feat: 收口聊天时知识库工具可见性

- 新增 chatTime 工具可见性抽象与知识库 resolver

- 聊天装配链路按当前用户过滤知识库工具并补齐调用兜底

- 补充聊天时显式登录快照与对应后端测试

easyflow-api/easyflow-api-admin/src/main/java/tech/easyflow/admin/controller/ai/BotController.java

@@ -17,6 +17,7 @@ import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 import tech.easyflow.admin.controller.ai.support.AiResourceCreatorNameSupport;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
 import tech.easyflow.ai.easyagents.listener.PromptChoreChatStreamListener;
 import tech.easyflow.ai.entity.*;
 import tech.easyflow.ai.publish.BotPublishAppService;
@@ -407,23 +408,32 @@ public class BotController extends BaseCurdController<BotService, Bot> {
     }
 
     private ChatRuntimeContext buildRuntimeContext(Bot bot, BigInteger conversationId, String prompt, List<String> attachments) {
-        LoginAccount account = SaTokenUtil.getLoginAccount();
+        LoginAccount account = requireCurrentLoginAccount();
         ChatRuntimeContext context = new ChatRuntimeContext();
         context.setChannel(ChatChannel.ADMIN);
         context.setSessionId(conversationId);
-        context.setTenantId(account == null ? BigInteger.ZERO : account.getTenantId());
-        context.setDeptId(account == null ? BigInteger.ZERO : account.getDeptId());
-        context.setUserId(account == null ? BigInteger.ZERO : account.getId());
-        context.setUserAccount(account == null ? "admin" : account.getLoginName());
-        context.setUserName(account == null ? "管理员" : (StringUtils.hasText(account.getNickname()) ? account.getNickname() : account.getLoginName()));
+        context.setTenantId(account.getTenantId());
+        context.setDeptId(account.getDeptId());
+        context.setUserId(account.getId());
+        context.setUserAccount(account.getLoginName());
+        context.setUserName(StringUtils.hasText(account.getNickname()) ? account.getNickname() : account.getLoginName());
         context.setAssistantId(bot == null ? BigInteger.ZERO : bot.getId());
         context.setAssistantCode(bot == null ? null : bot.getAlias());
         context.setAssistantName(bot == null ? null : bot.getTitle());
         context.setSessionTitle(prompt.length() > 200 ? prompt.substring(0, 200) : prompt);
         context.setAttachments(attachments);
+        ChatTimeToolAvailabilityContext.bindLoggedInSnapshot(context, account, bot);
         return context;
     }
 
+    private LoginAccount requireCurrentLoginAccount() {
+        try {
+            return SaTokenUtil.getLoginAccount();
+        } catch (Exception e) {
+            throw new BusinessException("当前登录状态失效，请重新登录后再试");
+        }
+    }
+
     @Override
     protected Result<?> onRemoveBefore(Collection<Serializable> ids) {
         QueryWrapper queryWrapperKnowledge = QueryWrapper.create().in(BotDocumentCollection::getBotId, ids);

easyflow-api/easyflow-api-usercenter/src/main/java/tech/easyflow/usercenter/controller/ai/UcBotController.java

@@ -17,6 +17,7 @@ import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
 import tech.easyflow.ai.entity.*;
 import tech.easyflow.ai.service.*;
 import tech.easyflow.ai.service.impl.BotServiceImpl;
@@ -287,24 +288,33 @@ public class UcBotController extends BaseCurdController<BotService, Bot> {
     }
 
     private ChatRuntimeContext buildRuntimeContext(Bot bot, BigInteger conversationId, String prompt, List<String> attachments) {
-        LoginAccount account = SaTokenUtil.getLoginAccount();
+        LoginAccount account = requireCurrentLoginAccount();
         ChatRuntimeContext context = new ChatRuntimeContext();
         context.setChannel(ChatChannel.USER_CENTER);
         context.setSessionId(conversationId);
-        context.setTenantId(account == null ? BigInteger.ZERO : account.getTenantId());
-        context.setDeptId(account == null ? BigInteger.ZERO : account.getDeptId());
-        context.setUserId(account == null ? BigInteger.ZERO : account.getId());
-        context.setUserAccount(account == null ? "anonymous" : account.getLoginName());
-        context.setUserName(account == null ? "匿名用户" : (StringUtils.hasText(account.getNickname()) ? account.getNickname() : account.getLoginName()));
+        context.setTenantId(account.getTenantId());
+        context.setDeptId(account.getDeptId());
+        context.setUserId(account.getId());
+        context.setUserAccount(account.getLoginName());
+        context.setUserName(StringUtils.hasText(account.getNickname()) ? account.getNickname() : account.getLoginName());
         context.setAssistantId(bot == null ? BigInteger.ZERO : bot.getId());
         context.setAssistantCode(bot == null ? null : bot.getAlias());
         context.setAssistantName(bot == null ? null : bot.getTitle());
         context.setSessionTitle(prompt.length() > 200 ? prompt.substring(0, 200) : prompt);
-        context.setAnonymous(account == null || BigInteger.ZERO.equals(account.getId()));
+        context.setAnonymous(false);
         context.setAttachments(attachments);
+        ChatTimeToolAvailabilityContext.bindLoggedInSnapshot(context, account, bot);
         return context;
     }
 
+    private LoginAccount requireCurrentLoginAccount() {
+        try {
+            return SaTokenUtil.getLoginAccount();
+        } catch (Exception e) {
+            throw new BusinessException("当前登录状态失效，请重新登录后再试");
+        }
+    }
+
     private Map<String, Object> getDefaultLlmOptions() {
         Map<String, Object> defaultLlmOptions = new HashMap<>();
         defaultLlmOptions.put("temperature", 0.7);

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeKnowledgeAvailabilityResolver.java

@@ -0,0 +1,100 @@
+package tech.easyflow.ai.chattime.availability;
+
+import org.springframework.stereotype.Component;
+import tech.easyflow.ai.entity.BotDocumentCollection;
+import tech.easyflow.ai.entity.DocumentCollection;
+import tech.easyflow.ai.permission.KnowledgeReadAccessSnapshot;
+import tech.easyflow.ai.permission.KnowledgeVisibilityQueryHelper;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.system.entity.vo.RoleCategoryAccessSnapshot;
+import tech.easyflow.system.enums.CategoryResourceType;
+import tech.easyflow.system.service.CategoryPermissionService;
+import tech.easyflow.system.service.SysDeptService;
+
+import java.math.BigInteger;
+import java.util.Collections;
+import java.util.Set;
+
+/**
+ * 知识库聊天时可用性判定器。
+ */
+@Component
+public class ChatTimeKnowledgeAvailabilityResolver implements ChatTimeToolAvailabilityResolver {
+
+    private final KnowledgeVisibilityQueryHelper knowledgeVisibilityQueryHelper;
+    private final CategoryPermissionService categoryPermissionService;
+    private final SysDeptService sysDeptService;
+
+    public ChatTimeKnowledgeAvailabilityResolver(KnowledgeVisibilityQueryHelper knowledgeVisibilityQueryHelper,
+                                                 CategoryPermissionService categoryPermissionService,
+                                                 SysDeptService sysDeptService) {
+        this.knowledgeVisibilityQueryHelper = knowledgeVisibilityQueryHelper;
+        this.categoryPermissionService = categoryPermissionService;
+        this.sysDeptService = sysDeptService;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean supports(Object candidate) {
+        return candidate instanceof DocumentCollection || candidate instanceof BotDocumentCollection;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public ChatTimeToolAvailabilityDecision resolve(ChatTimeToolAvailabilityContext context, Object candidate) {
+        LoginAccount loginAccount = context == null ? null : context.getLoginAccount();
+        if (loginAccount == null || loginAccount.getId() == null) {
+            return ChatTimeToolAvailabilityDecision.unavailable("CHAT_TIME_LOGIN_ACCOUNT_MISSING", "聊天上下文缺少当前用户身份");
+        }
+        DocumentCollection knowledge = extractKnowledge(candidate);
+        if (knowledge == null) {
+            return ChatTimeToolAvailabilityDecision.unavailable("CHAT_TIME_KNOWLEDGE_MISSING", "聊天绑定的知识库不存在");
+        }
+        KnowledgeReadAccessSnapshot readSnapshot = buildReadSnapshot(loginAccount);
+        if (knowledgeVisibilityQueryHelper.canRead(knowledge, readSnapshot)) {
+            return ChatTimeToolAvailabilityDecision.available();
+        }
+        return ChatTimeToolAvailabilityDecision.unavailable("CHAT_TIME_KNOWLEDGE_FORBIDDEN", "当前用户无权在聊天中访问该知识库");
+    }
+
+    /**
+     * 基于显式登录快照构造知识库读权限快照，避免依赖线程登录态。
+     *
+     * @param loginAccount 当前聊天用户
+     * @return 读权限快照
+     */
+    protected KnowledgeReadAccessSnapshot buildReadSnapshot(LoginAccount loginAccount) {
+        RoleCategoryAccessSnapshot categoryAccess = categoryPermissionService.getAccess(
+                CategoryResourceType.KNOWLEDGE.getCode(),
+                loginAccount
+        );
+        if (categoryAccess.isSuperAdmin()) {
+            return new KnowledgeReadAccessSnapshot(categoryAccess, Collections.emptySet());
+        }
+        BigInteger deptId = loginAccount.getDeptId();
+        Set<BigInteger> readableDeptIds = deptId == null
+                ? Collections.emptySet()
+                : sysDeptService.getSelfAndAncestorDeptIds(deptId);
+        return new KnowledgeReadAccessSnapshot(categoryAccess, readableDeptIds);
+    }
+
+    /**
+     * 从聊天工具候选项中提取知识库实体。
+     *
+     * @param candidate 候选项
+     * @return 知识库实体
+     */
+    protected DocumentCollection extractKnowledge(Object candidate) {
+        if (candidate instanceof DocumentCollection documentCollection) {
+            return documentCollection;
+        }
+        if (candidate instanceof BotDocumentCollection botDocumentCollection) {
+            return botDocumentCollection.getKnowledge();
+        }
+        return null;
+    }
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityContext.java

@@ -0,0 +1,122 @@
+package tech.easyflow.ai.chattime.availability;
+
+import tech.easyflow.ai.entity.Bot;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.core.runtime.ChatChannel;
+import tech.easyflow.core.runtime.ChatRuntimeContext;
+
+import java.io.Serializable;
+import java.math.BigInteger;
+import java.util.Map;
+
+/**
+ * 聊天时工具可用性判定上下文。
+ */
+public class ChatTimeToolAvailabilityContext implements Serializable {
+
+    /**
+     * 运行时上下文中保存聊天时权限快照的扩展字段 key。
+     */
+    public static final String RUNTIME_EXT_KEY = "chatTimeToolAvailabilityContext";
+
+    private LoginAccount loginAccount;
+
+    private Bot bot;
+
+    private ChatChannel chatChannel;
+
+    private BigInteger sessionId;
+
+    /**
+     * 将当前登录用户快照绑定到运行时上下文。
+     *
+     * @param runtimeContext 聊天运行时上下文
+     * @param loginAccount 登录用户快照
+     * @param bot 当前聊天助手
+     */
+    public static void bindLoggedInSnapshot(ChatRuntimeContext runtimeContext, LoginAccount loginAccount, Bot bot) {
+        if (!hasLoggedInAccount(loginAccount)) {
+            return;
+        }
+        ChatTimeToolAvailabilityContext chatTimeContext = new ChatTimeToolAvailabilityContext();
+        chatTimeContext.setLoginAccount(loginAccount);
+        chatTimeContext.setBot(bot);
+        chatTimeContext.setChatChannel(runtimeContext == null ? null : runtimeContext.getChannel());
+        chatTimeContext.setSessionId(runtimeContext == null ? null : runtimeContext.getSessionId());
+        chatTimeContext.bindToRuntimeContext(runtimeContext);
+    }
+
+    /**
+     * 判断是否为可用于聊天态权限判定的登录用户。
+     *
+     * @param loginAccount 登录用户快照
+     * @return 是否为有效登录用户
+     */
+    public static boolean hasLoggedInAccount(LoginAccount loginAccount) {
+        return loginAccount != null
+                && loginAccount.getId() != null
+                && !BigInteger.ZERO.equals(loginAccount.getId());
+    }
+
+    /**
+     * 绑定到聊天运行时上下文，供异步链路显式透传。
+     *
+     * @param runtimeContext 聊天运行时上下文
+     */
+    public void bindToRuntimeContext(ChatRuntimeContext runtimeContext) {
+        if (runtimeContext == null) {
+            return;
+        }
+        Map<String, Object> ext = runtimeContext.getExt();
+        ext.put(RUNTIME_EXT_KEY, this);
+    }
+
+    /**
+     * 从聊天运行时上下文中读取聊天时权限上下文。
+     *
+     * @param runtimeContext 聊天运行时上下文
+     * @return 聊天时权限上下文，不存在时返回 null
+     */
+    public static ChatTimeToolAvailabilityContext fromRuntimeContext(ChatRuntimeContext runtimeContext) {
+        if (runtimeContext == null || runtimeContext.getExt() == null) {
+            return null;
+        }
+        Object value = runtimeContext.getExt().get(RUNTIME_EXT_KEY);
+        if (value instanceof ChatTimeToolAvailabilityContext context) {
+            return context;
+        }
+        return null;
+    }
+
+    public LoginAccount getLoginAccount() {
+        return loginAccount;
+    }
+
+    public void setLoginAccount(LoginAccount loginAccount) {
+        this.loginAccount = loginAccount;
+    }
+
+    public Bot getBot() {
+        return bot;
+    }
+
+    public void setBot(Bot bot) {
+        this.bot = bot;
+    }
+
+    public ChatChannel getChatChannel() {
+        return chatChannel;
+    }
+
+    public void setChatChannel(ChatChannel chatChannel) {
+        this.chatChannel = chatChannel;
+    }
+
+    public BigInteger getSessionId() {
+        return sessionId;
+    }
+
+    public void setSessionId(BigInteger sessionId) {
+        this.sessionId = sessionId;
+    }
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityDecision.java

@@ -0,0 +1,63 @@
+package tech.easyflow.ai.chattime.availability;
+
+/**
+ * 聊天时工具可用性判定结果。
+ */
+public class ChatTimeToolAvailabilityDecision {
+
+    private boolean available;
+
+    private String reasonCode;
+
+    private String reasonMessage;
+
+    /**
+     * 创建可用判定。
+     *
+     * @return 可用判定
+     */
+    public static ChatTimeToolAvailabilityDecision available() {
+        ChatTimeToolAvailabilityDecision decision = new ChatTimeToolAvailabilityDecision();
+        decision.setAvailable(true);
+        return decision;
+    }
+
+    /**
+     * 创建不可用判定。
+     *
+     * @param reasonCode 原因编码
+     * @param reasonMessage 原因说明
+     * @return 不可用判定
+     */
+    public static ChatTimeToolAvailabilityDecision unavailable(String reasonCode, String reasonMessage) {
+        ChatTimeToolAvailabilityDecision decision = new ChatTimeToolAvailabilityDecision();
+        decision.setAvailable(false);
+        decision.setReasonCode(reasonCode);
+        decision.setReasonMessage(reasonMessage);
+        return decision;
+    }
+
+    public boolean isAvailable() {
+        return available;
+    }
+
+    public void setAvailable(boolean available) {
+        this.available = available;
+    }
+
+    public String getReasonCode() {
+        return reasonCode;
+    }
+
+    public void setReasonCode(String reasonCode) {
+        this.reasonCode = reasonCode;
+    }
+
+    public String getReasonMessage() {
+        return reasonMessage;
+    }
+
+    public void setReasonMessage(String reasonMessage) {
+        this.reasonMessage = reasonMessage;
+    }
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityResolver.java

@@ -0,0 +1,24 @@
+package tech.easyflow.ai.chattime.availability;
+
+/**
+ * 聊天时工具可用性判定器。
+ */
+public interface ChatTimeToolAvailabilityResolver {
+
+    /**
+     * 当前判定器是否支持指定候选项。
+     *
+     * @param candidate 聊天工具候选项
+     * @return 是否支持
+     */
+    boolean supports(Object candidate);
+
+    /**
+     * 计算候选项在当前聊天上下文中的可用性。
+     *
+     * @param context 聊天时上下文
+     * @param candidate 聊天工具候选项
+     * @return 判定结果
+     */
+    ChatTimeToolAvailabilityDecision resolve(ChatTimeToolAvailabilityContext context, Object candidate);
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityService.java

@@ -0,0 +1,37 @@
+package tech.easyflow.ai.chattime.availability;
+
+import java.util.List;
+
+/**
+ * 聊天时工具可用性编排服务。
+ */
+public interface ChatTimeToolAvailabilityService {
+
+    /**
+     * 评估单个候选项的聊天时可用性。
+     *
+     * @param context 聊天时上下文
+     * @param candidate 聊天工具候选项
+     * @return 判定结果
+     */
+    ChatTimeToolAvailabilityDecision evaluate(ChatTimeToolAvailabilityContext context, Object candidate);
+
+    /**
+     * 过滤当前聊天上下文中可用的候选项。
+     *
+     * @param context 聊天时上下文
+     * @param candidates 候选项列表
+     * @param <T> 候选项类型
+     * @return 过滤后的候选项
+     */
+    <T> List<T> filterAvailable(ChatTimeToolAvailabilityContext context, List<T> candidates);
+
+    /**
+     * 断言候选项在当前聊天上下文中可用。
+     *
+     * @param context 聊天时上下文
+     * @param candidate 聊天工具候选项
+     * @param fallbackMessage 默认兜底文案
+     */
+    void assertAvailable(ChatTimeToolAvailabilityContext context, Object candidate, String fallbackMessage);
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityServiceImpl.java

@@ -0,0 +1,68 @@
+package tech.easyflow.ai.chattime.availability;
+
+import org.springframework.stereotype.Service;
+import tech.easyflow.common.web.exceptions.BusinessException;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+/**
+ * 聊天时工具可用性编排服务实现。
+ */
+@Service
+public class ChatTimeToolAvailabilityServiceImpl implements ChatTimeToolAvailabilityService {
+
+    private final List<ChatTimeToolAvailabilityResolver> resolvers;
+
+    public ChatTimeToolAvailabilityServiceImpl(List<ChatTimeToolAvailabilityResolver> resolvers) {
+        this.resolvers = resolvers == null ? Collections.emptyList() : resolvers;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public ChatTimeToolAvailabilityDecision evaluate(ChatTimeToolAvailabilityContext context, Object candidate) {
+        if (candidate == null) {
+            return ChatTimeToolAvailabilityDecision.unavailable("TOOL_CANDIDATE_MISSING", "聊天工具候选项不存在");
+        }
+        for (ChatTimeToolAvailabilityResolver resolver : resolvers) {
+            if (resolver.supports(candidate)) {
+                return resolver.resolve(context, candidate);
+            }
+        }
+        return ChatTimeToolAvailabilityDecision.unavailable("TOOL_RESOLVER_MISSING", "当前聊天工具缺少可用性判定器");
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public <T> List<T> filterAvailable(ChatTimeToolAvailabilityContext context, List<T> candidates) {
+        if (candidates == null || candidates.isEmpty()) {
+            return Collections.emptyList();
+        }
+        return candidates.stream()
+                .filter(Objects::nonNull)
+                .filter(candidate -> evaluate(context, candidate).isAvailable())
+                .collect(Collectors.toList());
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void assertAvailable(ChatTimeToolAvailabilityContext context, Object candidate, String fallbackMessage) {
+        ChatTimeToolAvailabilityDecision decision = evaluate(context, candidate);
+        if (decision.isAvailable()) {
+            return;
+        }
+        String message = decision.getReasonMessage();
+        if (message == null || message.isBlank()) {
+            message = fallbackMessage;
+        }
+        throw new BusinessException(message == null || message.isBlank() ? "当前聊天工具不可用" : message);
+    }
+}

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/easyagents/tool/DocumentCollectionTool.java

@@ -4,30 +4,69 @@ import com.easyagents.core.document.Document;
 import com.easyagents.core.model.chat.tool.BaseTool;
 import com.easyagents.core.model.chat.tool.Parameter;
 import com.easyagents.rag.retrieval.RetrievalMode;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityService;
 import tech.easyflow.ai.entity.DocumentCollection;
 import tech.easyflow.ai.rag.KnowledgeRetrievalRequest;
 import tech.easyflow.ai.service.DocumentCollectionService;
 import tech.easyflow.common.util.SpringContextUtil;
+import tech.easyflow.common.web.exceptions.BusinessException;
 
 import java.math.BigInteger;
 import java.util.List;
 import java.util.Map;
 
+/**
+ * 知识库聊天工具。
+ */
 public class DocumentCollectionTool extends BaseTool {
 
     private BigInteger knowledgeId;
     private RetrievalMode retrievalMode = RetrievalMode.HYBRID;
+    private ChatTimeToolAvailabilityContext chatTimeContext;
 
+    /**
+     * 默认构造器。
+     */
     public DocumentCollectionTool() {
     }
 
+    /**
+     * 基于知识库实体构造聊天工具。
+     *
+     * @param documentCollection 知识库
+     * @param needEnglishName 是否使用英文名
+     */
     public DocumentCollectionTool(DocumentCollection documentCollection, boolean needEnglishName) {
         this(documentCollection, needEnglishName, RetrievalMode.HYBRID);
     }
 
+    /**
+     * 基于知识库实体构造聊天工具。
+     *
+     * @param documentCollection 知识库
+     * @param needEnglishName 是否使用英文名
+     * @param retrievalMode 检索模式
+     */
     public DocumentCollectionTool(DocumentCollection documentCollection, boolean needEnglishName, RetrievalMode retrievalMode) {
+        this(documentCollection, needEnglishName, retrievalMode, null);
+    }
+
+    /**
+     * 基于知识库实体和聊天时权限上下文构造聊天工具。
+     *
+     * @param documentCollection 知识库
+     * @param needEnglishName 是否使用英文名
+     * @param retrievalMode 检索模式
+     * @param chatTimeContext 聊天时权限上下文
+     */
+    public DocumentCollectionTool(DocumentCollection documentCollection,
+                                  boolean needEnglishName,
+                                  RetrievalMode retrievalMode,
+                                  ChatTimeToolAvailabilityContext chatTimeContext) {
         this.knowledgeId = documentCollection.getId();
         this.retrievalMode = retrievalMode == null ? RetrievalMode.HYBRID : retrievalMode;
+        this.chatTimeContext = chatTimeContext;
         if (needEnglishName) {
             this.name = documentCollection.getEnglishName();
         } else {
@@ -63,10 +102,42 @@ public class DocumentCollectionTool extends BaseTool {
         this.retrievalMode = retrievalMode == null ? RetrievalMode.HYBRID : retrievalMode;
     }
 
+    /**
+     * 获取聊天时权限上下文。
+     *
+     * @return 聊天时权限上下文
+     */
+    public ChatTimeToolAvailabilityContext getChatTimeContext() {
+        return chatTimeContext;
+    }
+
+    /**
+     * 设置聊天时权限上下文。
+     *
+     * @param chatTimeContext 聊天时权限上下文
+     */
+    public void setChatTimeContext(ChatTimeToolAvailabilityContext chatTimeContext) {
+        this.chatTimeContext = chatTimeContext;
+    }
+
+    /**
+     * 执行知识库检索。
+     *
+     * @param argsMap 工具入参
+     * @return 检索结果拼接文本
+     */
     @Override
     public Object invoke(Map<String, Object> argsMap) {
-
         DocumentCollectionService knowledgeService = SpringContextUtil.getBean(DocumentCollectionService.class);
+        DocumentCollection knowledge = null;
+        if (this.knowledgeId != null) {
+            knowledge = knowledgeService.getById(this.knowledgeId);
+        }
+        if (knowledge == null) {
+            throw new BusinessException("知识库不存在");
+        }
+        assertChatTimeAvailability(knowledge);
+
         KnowledgeRetrievalRequest request = new KnowledgeRetrievalRequest();
         request.setKnowledgeId(this.knowledgeId);
         request.setQuery((String) argsMap.get("input"));
@@ -91,5 +162,17 @@ public class DocumentCollectionTool extends BaseTool {
         return sb.toString();
     }
 
+    /**
+     * 当工具由聊天运行时装配时，执行聊天态权限兜底。
+     *
+     * @param knowledge 当前知识库实体
+     */
+    protected void assertChatTimeAvailability(DocumentCollection knowledge) {
+        if (chatTimeContext == null) {
+            return;
+        }
+        ChatTimeToolAvailabilityService availabilityService = SpringContextUtil.getBean(ChatTimeToolAvailabilityService.class);
+        availabilityService.assertAvailable(chatTimeContext, knowledge, "当前用户无权在聊天中访问该知识库");
+    }
 
 }

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/entity/DocumentCollection.java

@@ -8,6 +8,7 @@ import com.easyagents.store.milvus.MilvusVectorStore;
 import com.easyagents.store.milvus.MilvusVectorStoreConfig;
 import com.mybatisflex.annotation.Table;
 import tech.easyflow.ai.config.AiMilvusConfig;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
 import tech.easyflow.ai.easyagents.tool.DocumentCollectionTool;
 import tech.easyflow.ai.entity.base.DocumentCollectionBase;
 import tech.easyflow.ai.rag.KnowledgeRetrievalModes;
@@ -111,7 +112,19 @@ public class DocumentCollection extends DocumentCollectionBase implements Visibi
     }
 
     public Tool toFunction(boolean needEnglishName, String retrievalMode) {
-        return new DocumentCollectionTool(this, needEnglishName, KnowledgeRetrievalModes.parse(retrievalMode));
+        return toFunction(needEnglishName, retrievalMode, null);
+    }
+
+    /**
+     * 构造知识库聊天工具。
+     *
+     * @param needEnglishName 是否使用英文名称
+     * @param retrievalMode 检索模式
+     * @param chatTimeContext 聊天时权限上下文
+     * @return 聊天工具
+     */
+    public Tool toFunction(boolean needEnglishName, String retrievalMode, ChatTimeToolAvailabilityContext chatTimeContext) {
+        return new DocumentCollectionTool(this, needEnglishName, KnowledgeRetrievalModes.parse(retrievalMode), chatTimeContext);
     }
 
     public Object getOptionsByKey(String key) {

easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/service/impl/BotServiceImpl.java

@@ -24,10 +24,13 @@ import org.springframework.web.context.request.RequestAttributes;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.context.request.ServletRequestAttributes;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityService;
 import tech.easyflow.ai.easyagents.listener.ChatStreamListener;
 import tech.easyflow.ai.easyagents.memory.DefaultBotMessageMemory;
 import tech.easyflow.ai.easyagents.memory.PublicBotMessageMemory;
 import tech.easyflow.ai.easyagents.memory.RuntimeChatMemory;
+import tech.easyflow.ai.easyagents.tool.DocumentCollectionTool;
 import tech.easyflow.ai.easyagents.tool.WorkflowTool;
 import tech.easyflow.ai.easyagentsflow.support.PublishedWorkflowDefinitionIds;
 import tech.easyflow.ai.entity.*;
@@ -39,6 +42,7 @@ import tech.easyflow.ai.utils.CustomBeanUtils;
 import tech.easyflow.ai.utils.RegexUtils;
 import tech.easyflow.common.filestorage.FileStorageService;
 import tech.easyflow.common.filestorage.utils.PathGeneratorUtil;
+import tech.easyflow.common.entity.LoginAccount;
 import tech.easyflow.common.satoken.util.SaTokenUtil;
 import tech.easyflow.common.util.MapUtil;
 import tech.easyflow.common.util.Maps;
@@ -131,6 +135,8 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
     private CategoryPermissionService categoryPermissionService;
     @Resource
     private ChatRuntimeManager chatRuntimeManager;
+    @Resource
+    private ChatTimeToolAvailabilityService chatTimeToolAvailabilityService;
 
     @Override
     public Bot getDetail(String id) {
@@ -274,6 +280,7 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
                                 BotServiceImpl.ChatCheckResult chatCheckResult, List<String> attachments, ChatRuntimeContext runtimeContext) {
         Map<String, Object> modelOptions = chatCheckResult.getModelOptions();
         ChatModel chatModel = chatCheckResult.getChatModel();
+        ChatTimeToolAvailabilityContext chatTimeContext = buildChatTimeToolAvailabilityContext(runtimeContext, chatCheckResult.getAiBot());
         final MemoryPrompt memoryPrompt = new MemoryPrompt();
         String systemPrompt = buildSystemPromptWithFaqImageRule(
                 MapUtil.getString(modelOptions, Bot.KEY_SYSTEM_PROMPT)
@@ -293,6 +300,7 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
         userMessage.addTools(buildFunctionList(Maps.of("botId", botId)
                 .set("needEnglishName", false)
                 .set("bot", chatCheckResult.getAiBot())
+                .set("chatTimeContext", chatTimeContext)
                 .set("publishedOnly", chatCheckResult.isPublishedAccess())));
         ChatOptions chatOptions = getChatOptions(modelOptions);
         Boolean enableDeepThinking = MapUtil.getBoolean(modelOptions, Bot.KEY_ENABLE_DEEP_THINKING, false);
@@ -463,6 +471,7 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
             needEnglishName = false;
         }
         Bot runtimeBot = (Bot) buildParams.get("bot");
+        ChatTimeToolAvailabilityContext chatTimeContext = (ChatTimeToolAvailabilityContext) buildParams.get("chatTimeContext");
         boolean usePublishedSnapshot = Boolean.TRUE.equals(buildParams.get("publishedOnly"))
                 && runtimeBot != null
                 && runtimeBot.getPublishedSnapshotJson() != null
@@ -471,7 +480,7 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
         QueryWrapper queryWrapper = QueryWrapper.create();
         if (usePublishedSnapshot) {
             appendPublishedWorkflowTools(functionList, runtimeBot, needEnglishName);
-            appendPublishedKnowledgeTools(functionList, runtimeBot, needEnglishName);
+            appendPublishedKnowledgeTools(functionList, runtimeBot, needEnglishName, chatTimeContext);
         } else {
             // 工作流 function 集合
             queryWrapper.eq(BotWorkflow::getBotId, botId);
@@ -489,13 +498,7 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
             queryWrapper.eq(BotDocumentCollection::getBotId, botId);
             List<BotDocumentCollection> botDocumentCollections = botDocumentCollectionService.getMapper()
                     .selectListWithRelationsByQuery(queryWrapper);
-            if (botDocumentCollections != null && !botDocumentCollections.isEmpty()) {
-                for (BotDocumentCollection botDocumentCollection : botDocumentCollections) {
-                    Tool function = botDocumentCollection.getKnowledge()
-                            .toFunction(needEnglishName, botDocumentCollection.getRetrievalMode().name());
-                    functionList.add(function);
-                }
-            }
+            functionList.addAll(buildKnowledgeTools(botDocumentCollections, needEnglishName, chatTimeContext));
         }
 
         // 插件 function 集合
@@ -534,6 +537,39 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
         return functionList;
     }
 
+    /**
+     * 将 Bot 绑定的知识库候选项收敛为当前聊天可用的工具列表。
+     *
+     * @param botDocumentCollections Bot 知识库绑定项
+     * @param needEnglishName 是否使用英文名称
+     * @param chatTimeContext 聊天时权限上下文
+     * @return 知识库工具列表
+     */
+    List<Tool> buildKnowledgeTools(List<BotDocumentCollection> botDocumentCollections,
+                                   boolean needEnglishName,
+                                   ChatTimeToolAvailabilityContext chatTimeContext) {
+        List<Tool> functionList = new ArrayList<>();
+        if (botDocumentCollections == null || botDocumentCollections.isEmpty()) {
+            return functionList;
+        }
+        List<BotDocumentCollection> availableBindings = chatTimeContext == null
+                ? botDocumentCollections
+                : chatTimeToolAvailabilityService.filterAvailable(chatTimeContext, botDocumentCollections);
+        for (BotDocumentCollection botDocumentCollection : availableBindings) {
+            DocumentCollection knowledge = botDocumentCollection.getKnowledge();
+            if (knowledge == null) {
+                continue;
+            }
+            DocumentCollectionTool function = (DocumentCollectionTool) knowledge.toFunction(
+                    needEnglishName,
+                    botDocumentCollection.getRetrievalMode().name(),
+                    chatTimeContext
+            );
+            functionList.add(function);
+        }
+        return functionList;
+    }
+
     @SuppressWarnings("unchecked")
     private void appendPublishedWorkflowTools(List<Tool> functionList, Bot runtimeBot, boolean needEnglishName) {
         Object workflows = runtimeBot.getPublishedSnapshotJson().get("workflowBindings");
@@ -562,7 +598,10 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
     }
 
     @SuppressWarnings("unchecked")
-    private void appendPublishedKnowledgeTools(List<Tool> functionList, Bot runtimeBot, boolean needEnglishName) {
+    private void appendPublishedKnowledgeTools(List<Tool> functionList,
+                                               Bot runtimeBot,
+                                               boolean needEnglishName,
+                                               ChatTimeToolAvailabilityContext chatTimeContext) {
         Object knowledges = runtimeBot.getPublishedSnapshotJson().get("knowledgeBindings");
         if (!(knowledges instanceof List<?> knowledgeBindings)) {
             return;
@@ -579,14 +618,40 @@ public class BotServiceImpl extends ServiceImpl<BotMapper, Bot> implements BotSe
             if (knowledge == null) {
                 continue;
             }
+            if (chatTimeContext != null && !chatTimeToolAvailabilityService.evaluate(chatTimeContext, knowledge).isAvailable()) {
+                continue;
+            }
             Object retrievalMode = bindingMap.get("retrievalMode");
             functionList.add(knowledge.toFunction(
                     needEnglishName,
-                    retrievalMode == null ? null : String.valueOf(retrievalMode)
+                    retrievalMode == null ? null : String.valueOf(retrievalMode),
+                    chatTimeContext
             ));
         }
     }
 
+    /**
+     * 构造聊天时工具可用性上下文，并显式回填到运行时上下文中供后续异步工具调用复用。
+     *
+     * @param runtimeContext 聊天运行时上下文
+     * @param bot 当前聊天助手
+     * @return 聊天时工具可用性上下文
+     */
+    private ChatTimeToolAvailabilityContext buildChatTimeToolAvailabilityContext(ChatRuntimeContext runtimeContext, Bot bot) {
+        ChatTimeToolAvailabilityContext existing = ChatTimeToolAvailabilityContext.fromRuntimeContext(runtimeContext);
+        LoginAccount loginAccount = existing == null ? null : existing.getLoginAccount();
+        if (!ChatTimeToolAvailabilityContext.hasLoggedInAccount(loginAccount)) {
+            return null;
+        }
+        ChatTimeToolAvailabilityContext context = existing == null ? new ChatTimeToolAvailabilityContext() : existing;
+        context.setLoginAccount(loginAccount);
+        context.setBot(bot);
+        context.setChatChannel(runtimeContext == null ? null : runtimeContext.getChannel());
+        context.setSessionId(runtimeContext == null ? null : runtimeContext.getSessionId());
+        context.bindToRuntimeContext(runtimeContext);
+        return context;
+    }
+
     public String attachmentsToString(List<String> fileList) {
         StringBuilder messageBuilder = new StringBuilder();
         if (fileList != null && !fileList.isEmpty()) {

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/chattime/availability/ChatTimeKnowledgeAvailabilityResolverTest.java

@@ -0,0 +1,187 @@
+package tech.easyflow.ai.chattime.availability;
+
+import org.junit.Assert;
+import org.junit.Test;
+import tech.easyflow.ai.entity.DocumentCollection;
+import tech.easyflow.ai.permission.KnowledgeVisibilityQueryHelper;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.system.entity.vo.RoleCategoryAccessSnapshot;
+import tech.easyflow.system.service.CategoryPermissionService;
+import tech.easyflow.system.service.SysDeptService;
+
+import java.lang.reflect.Proxy;
+import java.math.BigInteger;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * {@link ChatTimeKnowledgeAvailabilityResolver} 单元测试。
+ *
+ * @author Codex
+ * @since 2026-05-10
+ */
+public class ChatTimeKnowledgeAvailabilityResolverTest {
+
+    /**
+     * 创建者应始终可访问自己的私有知识库。
+     */
+    @Test
+    public void resolveShouldAllowCreatorForPrivateKnowledge() {
+        LoginAccount loginAccount = buildLoginAccount(11, 3);
+        ChatTimeKnowledgeAvailabilityResolver resolver = buildResolver(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(11), false, false, Collections.emptySet()),
+                setOf(BigInteger.valueOf(3))
+        );
+
+        ChatTimeToolAvailabilityDecision decision = resolver.resolve(
+                buildContext(loginAccount),
+                buildKnowledge(11, 21, null, "PRIVATE")
+        );
+
+        Assert.assertTrue(decision.isAvailable());
+    }
+
+    /**
+     * 分类权限不通过时，即使知识库是公开范围也不可访问。
+     */
+    @Test
+    public void resolveShouldRejectWhenCategoryPermissionFails() {
+        LoginAccount loginAccount = buildLoginAccount(12, 3);
+        ChatTimeKnowledgeAvailabilityResolver resolver = buildResolver(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(99))),
+                setOf(BigInteger.valueOf(3))
+        );
+
+        ChatTimeToolAvailabilityDecision decision = resolver.resolve(
+                buildContext(loginAccount),
+                buildKnowledge(11, 21, null, "PUBLIC")
+        );
+
+        Assert.assertFalse(decision.isAvailable());
+        Assert.assertEquals("CHAT_TIME_KNOWLEDGE_FORBIDDEN", decision.getReasonCode());
+    }
+
+    /**
+     * 同部门或祖先部门命中时，应允许访问部门可见知识库。
+     */
+    @Test
+    public void resolveShouldAllowDeptScopedKnowledgeForReadableDept() {
+        LoginAccount loginAccount = buildLoginAccount(12, 9);
+        ChatTimeKnowledgeAvailabilityResolver resolver = buildResolver(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(21))),
+                setOf(BigInteger.valueOf(1), BigInteger.valueOf(3), BigInteger.valueOf(9))
+        );
+
+        ChatTimeToolAvailabilityDecision decision = resolver.resolve(
+                buildContext(loginAccount),
+                buildKnowledge(11, 21, BigInteger.valueOf(3), "DEPT")
+        );
+
+        Assert.assertTrue(decision.isAvailable());
+    }
+
+    /**
+     * 超级管理员始终可访问。
+     */
+    @Test
+    public void resolveShouldAllowSuperAdmin() {
+        LoginAccount loginAccount = buildLoginAccount(99, 1);
+        ChatTimeKnowledgeAvailabilityResolver resolver = buildResolver(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(99), true, true, Collections.emptySet()),
+                Collections.emptySet()
+        );
+
+        ChatTimeToolAvailabilityDecision decision = resolver.resolve(
+                buildContext(loginAccount),
+                buildKnowledge(11, 21, null, "PRIVATE")
+        );
+
+        Assert.assertTrue(decision.isAvailable());
+    }
+
+    private ChatTimeKnowledgeAvailabilityResolver buildResolver(RoleCategoryAccessSnapshot accessSnapshot,
+                                                                Set<BigInteger> deptIds) {
+        return new ChatTimeKnowledgeAvailabilityResolver(
+                new KnowledgeVisibilityQueryHelper(),
+                mockCategoryPermissionService(accessSnapshot),
+                mockSysDeptService(deptIds)
+        );
+    }
+
+    private ChatTimeToolAvailabilityContext buildContext(LoginAccount loginAccount) {
+        ChatTimeToolAvailabilityContext context = new ChatTimeToolAvailabilityContext();
+        context.setLoginAccount(loginAccount);
+        return context;
+    }
+
+    private LoginAccount buildLoginAccount(long accountId, long deptId) {
+        LoginAccount loginAccount = new LoginAccount();
+        loginAccount.setId(BigInteger.valueOf(accountId));
+        loginAccount.setDeptId(BigInteger.valueOf(deptId));
+        return loginAccount;
+    }
+
+    private DocumentCollection buildKnowledge(long createdBy, long categoryId, BigInteger deptId, String visibilityScope) {
+        DocumentCollection knowledge = new DocumentCollection();
+        knowledge.setId(BigInteger.valueOf(101));
+        knowledge.setCreatedBy(BigInteger.valueOf(createdBy));
+        knowledge.setCategoryId(BigInteger.valueOf(categoryId));
+        knowledge.setDeptId(deptId);
+        knowledge.setVisibilityScope(visibilityScope);
+        return knowledge;
+    }
+
+    private CategoryPermissionService mockCategoryPermissionService(RoleCategoryAccessSnapshot accessSnapshot) {
+        return (CategoryPermissionService) Proxy.newProxyInstance(
+                CategoryPermissionService.class.getClassLoader(),
+                new Class<?>[]{CategoryPermissionService.class},
+                (proxy, method, args) -> {
+                    if ("getAccess".equals(method.getName())) {
+                        return accessSnapshot;
+                    }
+                    if ("isSuperAdmin".equals(method.getName())) {
+                        return accessSnapshot.isSuperAdmin();
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private SysDeptService mockSysDeptService(Set<BigInteger> deptIds) {
+        Set<BigInteger> readableDeptIds = deptIds == null ? Collections.emptySet() : deptIds;
+        return (SysDeptService) Proxy.newProxyInstance(
+                SysDeptService.class.getClassLoader(),
+                new Class<?>[]{SysDeptService.class},
+                (proxy, method, args) -> {
+                    if ("getSelfAndAncestorDeptIds".equals(method.getName())) {
+                        return readableDeptIds;
+                    }
+                    if ("canUserAccessDeptScopedResource".equals(method.getName())) {
+                        BigInteger resourceDeptId = (BigInteger) args[1];
+                        return readableDeptIds.contains(resourceDeptId);
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private Set<BigInteger> setOf(BigInteger... values) {
+        Set<BigInteger> result = new LinkedHashSet<>();
+        Collections.addAll(result, values);
+        return result;
+    }
+
+    private Object defaultValue(Class<?> returnType) {
+        if (returnType == boolean.class) {
+            return false;
+        }
+        if (returnType == int.class) {
+            return 0;
+        }
+        if (returnType == long.class) {
+            return 0L;
+        }
+        return null;
+    }
+}

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/chattime/availability/ChatTimeToolAvailabilityContextTest.java

@@ -0,0 +1,58 @@
+package tech.easyflow.ai.chattime.availability;
+
+import org.junit.Assert;
+import org.junit.Test;
+import tech.easyflow.ai.entity.Bot;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.core.runtime.ChatChannel;
+import tech.easyflow.core.runtime.ChatRuntimeContext;
+
+import java.math.BigInteger;
+
+/**
+ * {@link ChatTimeToolAvailabilityContext} 单元测试。
+ *
+ * @author Codex
+ * @since 2026-05-10
+ */
+public class ChatTimeToolAvailabilityContextTest {
+
+    /**
+     * 登录用户快照应被显式绑定到聊天运行时上下文。
+     */
+    @Test
+    public void bindLoggedInSnapshotShouldAttachContextToRuntimeExt() {
+        ChatRuntimeContext runtimeContext = new ChatRuntimeContext();
+        runtimeContext.setChannel(ChatChannel.ADMIN);
+        runtimeContext.setSessionId(BigInteger.valueOf(2001));
+        LoginAccount loginAccount = new LoginAccount();
+        loginAccount.setId(BigInteger.valueOf(12));
+        Bot bot = new Bot();
+        bot.setId(BigInteger.valueOf(99));
+
+        ChatTimeToolAvailabilityContext.bindLoggedInSnapshot(runtimeContext, loginAccount, bot);
+
+        ChatTimeToolAvailabilityContext chatTimeContext = ChatTimeToolAvailabilityContext.fromRuntimeContext(runtimeContext);
+        Assert.assertNotNull(chatTimeContext);
+        Assert.assertEquals(BigInteger.valueOf(12), chatTimeContext.getLoginAccount().getId());
+        Assert.assertEquals(BigInteger.valueOf(99), chatTimeContext.getBot().getId());
+        Assert.assertEquals(ChatChannel.ADMIN, chatTimeContext.getChatChannel());
+        Assert.assertEquals(BigInteger.valueOf(2001), chatTimeContext.getSessionId());
+    }
+
+    /**
+     * 匿名或缺失账号快照时不应绑定聊天态权限上下文。
+     */
+    @Test
+    public void bindLoggedInSnapshotShouldIgnoreAnonymousAccount() {
+        ChatRuntimeContext runtimeContext = new ChatRuntimeContext();
+        runtimeContext.setChannel(ChatChannel.USER_CENTER);
+        runtimeContext.setSessionId(BigInteger.valueOf(3001));
+        LoginAccount loginAccount = new LoginAccount();
+        loginAccount.setId(BigInteger.ZERO);
+
+        ChatTimeToolAvailabilityContext.bindLoggedInSnapshot(runtimeContext, loginAccount, new Bot());
+
+        Assert.assertNull(ChatTimeToolAvailabilityContext.fromRuntimeContext(runtimeContext));
+    }
+}

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/easyagents/tool/DocumentCollectionToolTest.java

@@ -0,0 +1,305 @@
+package tech.easyflow.ai.easyagents.tool;
+
+import com.easyagents.core.document.Document;
+import com.easyagents.rag.retrieval.RetrievalMode;
+import org.junit.Assert;
+import org.junit.Test;
+import org.springframework.context.ApplicationContext;
+import tech.easyflow.ai.chattime.availability.ChatTimeKnowledgeAvailabilityResolver;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityService;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityServiceImpl;
+import tech.easyflow.ai.entity.DocumentCollection;
+import tech.easyflow.ai.permission.KnowledgeVisibilityQueryHelper;
+import tech.easyflow.ai.rag.KnowledgeRetrievalRequest;
+import tech.easyflow.ai.service.DocumentCollectionService;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.common.util.SpringContextUtil;
+import tech.easyflow.common.web.exceptions.BusinessException;
+import tech.easyflow.system.entity.vo.RoleCategoryAccessSnapshot;
+import tech.easyflow.system.service.CategoryPermissionService;
+import tech.easyflow.system.service.SysDeptService;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Proxy;
+import java.math.BigInteger;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.FutureTask;
+
+/**
+ * {@link DocumentCollectionTool} 单元测试。
+ *
+ * @author Codex
+ * @since 2026-05-10
+ */
+public class DocumentCollectionToolTest {
+
+    /**
+     * 直接构造一个本不应暴露的知识库 Tool 调用时，必须抛出无权限异常。
+     *
+     * @throws Exception 反射注入异常
+     */
+    @Test
+    public void invokeShouldThrowWhenChatTimeKnowledgeUnavailable() throws Exception {
+        TestDocumentCollectionService documentCollectionService = new TestDocumentCollectionService(
+                buildKnowledge(101, 11, 21, null, "PUBLIC"),
+                List.of(buildSearchDocument("should-not-reach"))
+        );
+        ChatTimeToolAvailabilityService availabilityService = buildAvailabilityService(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(99))),
+                Collections.emptySet()
+        );
+        ApplicationContext previousContext = getStaticField("applicationContext");
+        Object previousBeanFactory = getStaticField("beanFactory");
+        try {
+            setStaticField("beanFactory", null);
+            setStaticField("applicationContext", mockApplicationContext(documentCollectionService.toProxy(), availabilityService));
+            DocumentCollectionTool tool = new DocumentCollectionTool(
+                    buildKnowledge(101, 11, 21, null, "PUBLIC"),
+                    false,
+                    RetrievalMode.HYBRID,
+                    buildContext(12, 3)
+            );
+
+            BusinessException exception = Assert.assertThrows(
+                    BusinessException.class,
+                    () -> tool.invoke(Map.of("input", "test"))
+            );
+
+            Assert.assertEquals("当前用户无权在聊天中访问该知识库", exception.getMessage());
+            Assert.assertEquals(0, documentCollectionService.searchCount);
+        } finally {
+            setStaticField("applicationContext", previousContext);
+            setStaticField("beanFactory", previousBeanFactory);
+        }
+    }
+
+    /**
+     * 异步线程中即使没有当前线程登录态，也应能基于显式快照完成判权并执行检索。
+     *
+     * @throws Exception 反射注入异常
+     */
+    @Test
+    public void invokeShouldUseExplicitLoginSnapshotWithoutThreadState() throws Exception {
+        TestDocumentCollectionService documentCollectionService = new TestDocumentCollectionService(
+                buildKnowledge(101, 11, 21, null, "PUBLIC"),
+                List.of(buildSearchDocument("知识片段A"), buildSearchDocument("知识片段B"))
+        );
+        ChatTimeToolAvailabilityService availabilityService = buildAvailabilityService(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(21))),
+                Collections.emptySet()
+        );
+        ApplicationContext previousContext = getStaticField("applicationContext");
+        Object previousBeanFactory = getStaticField("beanFactory");
+        try {
+            setStaticField("beanFactory", null);
+            setStaticField("applicationContext", mockApplicationContext(documentCollectionService.toProxy(), availabilityService));
+            DocumentCollectionTool tool = new DocumentCollectionTool(
+                    buildKnowledge(101, 11, 21, null, "PUBLIC"),
+                    false,
+                    RetrievalMode.KEYWORD,
+                    buildContext(12, 3)
+            );
+            FutureTask<Object> task = new FutureTask<>(() -> tool.invoke(Map.of("input", "异步查询")));
+            Thread thread = new Thread(task, "document-collection-tool-test");
+            thread.start();
+
+            Object result = task.get();
+
+            Assert.assertEquals("知识片段A\n\n---\n\n知识片段B", result);
+            Assert.assertEquals(1, documentCollectionService.searchCount);
+            Assert.assertNotNull(documentCollectionService.lastRequest);
+            Assert.assertEquals("异步查询", documentCollectionService.lastRequest.getQuery());
+            Assert.assertEquals(RetrievalMode.KEYWORD, documentCollectionService.lastRequest.getRetrievalMode());
+            Assert.assertEquals("BOT_TOOL", documentCollectionService.lastRequest.getCallerType());
+            Assert.assertEquals("101", documentCollectionService.lastRequest.getCallerId());
+        } finally {
+            setStaticField("applicationContext", previousContext);
+            setStaticField("beanFactory", previousBeanFactory);
+        }
+    }
+
+    private ChatTimeToolAvailabilityService buildAvailabilityService(RoleCategoryAccessSnapshot accessSnapshot,
+                                                                    Set<BigInteger> deptIds) {
+        return new ChatTimeToolAvailabilityServiceImpl(List.of(
+                new ChatTimeKnowledgeAvailabilityResolver(
+                        new KnowledgeVisibilityQueryHelper(),
+                        mockCategoryPermissionService(accessSnapshot),
+                        mockSysDeptService(deptIds)
+                )
+        ));
+    }
+
+    private ChatTimeToolAvailabilityContext buildContext(long accountId, long deptId) {
+        LoginAccount loginAccount = new LoginAccount();
+        loginAccount.setId(BigInteger.valueOf(accountId));
+        loginAccount.setDeptId(BigInteger.valueOf(deptId));
+        ChatTimeToolAvailabilityContext context = new ChatTimeToolAvailabilityContext();
+        context.setLoginAccount(loginAccount);
+        return context;
+    }
+
+    private DocumentCollection buildKnowledge(long knowledgeId,
+                                              long createdBy,
+                                              long categoryId,
+                                              BigInteger deptId,
+                                              String visibilityScope) {
+        DocumentCollection knowledge = new DocumentCollection();
+        knowledge.setId(BigInteger.valueOf(knowledgeId));
+        knowledge.setTitle("knowledge-" + knowledgeId);
+        knowledge.setDescription("desc-" + knowledgeId);
+        knowledge.setCreatedBy(BigInteger.valueOf(createdBy));
+        knowledge.setCategoryId(BigInteger.valueOf(categoryId));
+        knowledge.setDeptId(deptId);
+        knowledge.setVisibilityScope(visibilityScope);
+        return knowledge;
+    }
+
+    private Document buildSearchDocument(String content) {
+        Document document = new Document();
+        document.setContent(content);
+        return document;
+    }
+
+    private ApplicationContext mockApplicationContext(DocumentCollectionService documentCollectionService,
+                                                      ChatTimeToolAvailabilityService availabilityService) {
+        return (ApplicationContext) Proxy.newProxyInstance(
+                ApplicationContext.class.getClassLoader(),
+                new Class[]{ApplicationContext.class},
+                (proxy, method, args) -> {
+                    if ("getBean".equals(method.getName()) && args != null && args.length == 1 && args[0] instanceof Class<?> clazz) {
+                        if (clazz == DocumentCollectionService.class) {
+                            return documentCollectionService;
+                        }
+                        if (clazz == ChatTimeToolAvailabilityService.class) {
+                            return availabilityService;
+                        }
+                    }
+                    if ("equals".equals(method.getName())) {
+                        return proxy == args[0];
+                    }
+                    if ("hashCode".equals(method.getName())) {
+                        return System.identityHashCode(proxy);
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private CategoryPermissionService mockCategoryPermissionService(RoleCategoryAccessSnapshot accessSnapshot) {
+        return (CategoryPermissionService) Proxy.newProxyInstance(
+                CategoryPermissionService.class.getClassLoader(),
+                new Class<?>[]{CategoryPermissionService.class},
+                (proxy, method, args) -> {
+                    if ("getAccess".equals(method.getName())) {
+                        return accessSnapshot;
+                    }
+                    if ("isSuperAdmin".equals(method.getName())) {
+                        return accessSnapshot.isSuperAdmin();
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private SysDeptService mockSysDeptService(Set<BigInteger> deptIds) {
+        Set<BigInteger> readableDeptIds = deptIds == null ? Collections.emptySet() : deptIds;
+        return (SysDeptService) Proxy.newProxyInstance(
+                SysDeptService.class.getClassLoader(),
+                new Class<?>[]{SysDeptService.class},
+                (proxy, method, args) -> {
+                    if ("getSelfAndAncestorDeptIds".equals(method.getName())) {
+                        return readableDeptIds;
+                    }
+                    if ("canUserAccessDeptScopedResource".equals(method.getName())) {
+                        BigInteger resourceDeptId = (BigInteger) args[1];
+                        return readableDeptIds.contains(resourceDeptId);
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    @SuppressWarnings("unchecked")
+    private <T> T getStaticField(String fieldName) throws Exception {
+        Field field = SpringContextUtil.class.getDeclaredField(fieldName);
+        field.setAccessible(true);
+        return (T) field.get(null);
+    }
+
+    private void setStaticField(String fieldName, Object value) throws Exception {
+        Field field = SpringContextUtil.class.getDeclaredField(fieldName);
+        field.setAccessible(true);
+        field.set(null, value);
+    }
+
+    private Set<BigInteger> setOf(BigInteger... values) {
+        Set<BigInteger> result = new LinkedHashSet<>();
+        Collections.addAll(result, values);
+        return result;
+    }
+
+    private Object defaultValue(Class<?> returnType) {
+        if (returnType == boolean.class) {
+            return false;
+        }
+        if (returnType == int.class) {
+            return 0;
+        }
+        if (returnType == long.class) {
+            return 0L;
+        }
+        return null;
+    }
+
+    /**
+     * 记录检索调用的最小知识库服务桩。
+     */
+    private static class TestDocumentCollectionService {
+
+        private final DocumentCollection knowledge;
+        private final List<Document> searchResult;
+        private int searchCount;
+        private KnowledgeRetrievalRequest lastRequest;
+
+        private TestDocumentCollectionService(DocumentCollection knowledge, List<Document> searchResult) {
+            this.knowledge = knowledge;
+            this.searchResult = searchResult;
+        }
+
+        private DocumentCollectionService toProxy() {
+            return (DocumentCollectionService) Proxy.newProxyInstance(
+                    DocumentCollectionService.class.getClassLoader(),
+                    new Class<?>[]{DocumentCollectionService.class},
+                    (proxy, method, args) -> {
+                        if ("getById".equals(method.getName())) {
+                            return knowledge;
+                        }
+                        if ("search".equals(method.getName()) && args != null && args.length == 1 && args[0] instanceof KnowledgeRetrievalRequest request) {
+                            this.searchCount++;
+                            this.lastRequest = request;
+                            return searchResult;
+                        }
+                        return defaultStaticValue(method.getReturnType());
+                    }
+            );
+        }
+
+        private static Object defaultStaticValue(Class<?> returnType) {
+            if (returnType == boolean.class) {
+                return false;
+            }
+            if (returnType == int.class) {
+                return 0;
+            }
+            if (returnType == long.class) {
+                return 0L;
+            }
+            return null;
+        }
+    }
+}

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/service/impl/BotServiceImplTest.java

@@ -0,0 +1,271 @@
+package tech.easyflow.ai.service.impl;
+
+import com.easyagents.core.model.chat.tool.Tool;
+import com.easyagents.rag.retrieval.RetrievalMode;
+import org.junit.Assert;
+import org.junit.Test;
+import tech.easyflow.ai.chattime.availability.ChatTimeKnowledgeAvailabilityResolver;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityContext;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityService;
+import tech.easyflow.ai.chattime.availability.ChatTimeToolAvailabilityServiceImpl;
+import tech.easyflow.ai.easyagents.tool.DocumentCollectionTool;
+import tech.easyflow.ai.entity.Bot;
+import tech.easyflow.ai.entity.BotDocumentCollection;
+import tech.easyflow.ai.entity.DocumentCollection;
+import tech.easyflow.ai.permission.KnowledgeVisibilityQueryHelper;
+import tech.easyflow.common.entity.LoginAccount;
+import tech.easyflow.system.entity.vo.RoleCategoryAccessSnapshot;
+import tech.easyflow.system.service.CategoryPermissionService;
+import tech.easyflow.system.service.SysDeptService;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * {@link BotServiceImpl} 单元测试。
+ *
+ * @author Codex
+ * @since 2026-05-10
+ */
+public class BotServiceImplTest {
+
+    /**
+     * 仅应为当前用户可访问的知识库生成聊天工具，并保留绑定检索模式。
+     *
+     * @throws Exception 反射注入异常
+     */
+    @Test
+    public void buildKnowledgeToolsShouldOnlyCreateAvailableTools() throws Exception {
+        BotServiceImpl service = new BotServiceImpl();
+        injectAvailabilityService(service, buildAvailabilityService(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(21))),
+                Collections.emptySet()
+        ));
+
+        List<Tool> tools = service.buildKnowledgeTools(
+                List.of(
+                        buildBinding(101, 11, 21, "PUBLIC", RetrievalMode.KEYWORD),
+                        buildBinding(102, 11, 99, "PUBLIC", RetrievalMode.HYBRID)
+                ),
+                false,
+                buildContext(12, 3)
+        );
+
+        Assert.assertEquals(1, tools.size());
+        Assert.assertTrue(tools.get(0) instanceof DocumentCollectionTool);
+        DocumentCollectionTool tool = (DocumentCollectionTool) tools.get(0);
+        Assert.assertEquals(BigInteger.valueOf(101), tool.getKnowledgeId());
+        Assert.assertEquals(RetrievalMode.KEYWORD, tool.getRetrievalMode());
+        Assert.assertNotNull(tool.getChatTimeContext());
+    }
+
+    /**
+     * 当全部绑定知识库都不可用时，聊天工具列表应为空。
+     *
+     * @throws Exception 反射注入异常
+     */
+    @Test
+    public void buildKnowledgeToolsShouldReturnEmptyWhenAllBindingsUnavailable() throws Exception {
+        BotServiceImpl service = new BotServiceImpl();
+        injectAvailabilityService(service, buildAvailabilityService(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(99))),
+                Collections.emptySet()
+        ));
+
+        List<Tool> tools = service.buildKnowledgeTools(
+                List.of(buildBinding(101, 11, 21, "PUBLIC", RetrievalMode.HYBRID)),
+                false,
+                buildContext(12, 3)
+        );
+
+        Assert.assertTrue(tools.isEmpty());
+    }
+
+    /**
+     * 已发布快照分支也应按聊天态权限过滤知识库，并保留检索模式。
+     *
+     * @throws Exception 反射调用异常
+     */
+    @Test
+    @SuppressWarnings("unchecked")
+    public void appendPublishedKnowledgeToolsShouldFilterUnavailableBindings() throws Exception {
+        BotServiceImpl service = new BotServiceImpl();
+        injectAvailabilityService(service, buildAvailabilityService(
+                new RoleCategoryAccessSnapshot("KNOWLEDGE", BigInteger.valueOf(12), false, false, setOf(BigInteger.valueOf(21))),
+                Collections.emptySet()
+        ));
+        injectDocumentCollectionService(service, mockDocumentCollectionService(
+                buildKnowledge(101, 11, 21, "PUBLIC"),
+                buildKnowledge(102, 11, 99, "PUBLIC")
+        ));
+
+        Bot runtimeBot = new Bot();
+        Map<String, Object> snapshot = new HashMap<>();
+        snapshot.put("knowledgeBindings", List.of(
+                buildPublishedBinding(101, RetrievalMode.KEYWORD),
+                buildPublishedBinding(102, RetrievalMode.HYBRID)
+        ));
+        runtimeBot.setPublishedSnapshotJson(snapshot);
+        List<Tool> functionList = new ArrayList<>();
+        Method method = BotServiceImpl.class.getDeclaredMethod(
+                "appendPublishedKnowledgeTools",
+                List.class,
+                Bot.class,
+                boolean.class,
+                ChatTimeToolAvailabilityContext.class
+        );
+        method.setAccessible(true);
+
+        method.invoke(service, functionList, runtimeBot, false, buildContext(12, 3));
+
+        Assert.assertEquals(1, functionList.size());
+        DocumentCollectionTool tool = (DocumentCollectionTool) functionList.get(0);
+        Assert.assertEquals(BigInteger.valueOf(101), tool.getKnowledgeId());
+        Assert.assertEquals(RetrievalMode.KEYWORD, tool.getRetrievalMode());
+    }
+
+    private void injectAvailabilityService(BotServiceImpl service, ChatTimeToolAvailabilityService availabilityService) throws Exception {
+        Field field = BotServiceImpl.class.getDeclaredField("chatTimeToolAvailabilityService");
+        field.setAccessible(true);
+        field.set(service, availabilityService);
+    }
+
+    private void injectDocumentCollectionService(BotServiceImpl service, tech.easyflow.ai.service.DocumentCollectionService documentCollectionService) throws Exception {
+        Field field = BotServiceImpl.class.getDeclaredField("documentCollectionService");
+        field.setAccessible(true);
+        field.set(service, documentCollectionService);
+    }
+
+    private ChatTimeToolAvailabilityService buildAvailabilityService(RoleCategoryAccessSnapshot accessSnapshot,
+                                                                    Set<BigInteger> deptIds) {
+        return new ChatTimeToolAvailabilityServiceImpl(List.of(
+                new ChatTimeKnowledgeAvailabilityResolver(
+                        new KnowledgeVisibilityQueryHelper(),
+                        mockCategoryPermissionService(accessSnapshot),
+                        mockSysDeptService(deptIds)
+                )
+        ));
+    }
+
+    private ChatTimeToolAvailabilityContext buildContext(long accountId, long deptId) {
+        LoginAccount loginAccount = new LoginAccount();
+        loginAccount.setId(BigInteger.valueOf(accountId));
+        loginAccount.setDeptId(BigInteger.valueOf(deptId));
+        ChatTimeToolAvailabilityContext context = new ChatTimeToolAvailabilityContext();
+        context.setLoginAccount(loginAccount);
+        return context;
+    }
+
+    private BotDocumentCollection buildBinding(long knowledgeId,
+                                               long createdBy,
+                                               long categoryId,
+                                               String visibilityScope,
+                                               RetrievalMode retrievalMode) {
+        DocumentCollection knowledge = buildKnowledge(knowledgeId, createdBy, categoryId, visibilityScope);
+        BotDocumentCollection binding = new BotDocumentCollection();
+        binding.setDocumentCollectionId(BigInteger.valueOf(knowledgeId));
+        binding.setKnowledge(knowledge);
+        binding.setRetrievalMode(retrievalMode);
+        return binding;
+    }
+
+    private DocumentCollection buildKnowledge(long knowledgeId,
+                                              long createdBy,
+                                              long categoryId,
+                                              String visibilityScope) {
+        DocumentCollection knowledge = new DocumentCollection();
+        knowledge.setId(BigInteger.valueOf(knowledgeId));
+        knowledge.setTitle("knowledge-" + knowledgeId);
+        knowledge.setDescription("desc-" + knowledgeId);
+        knowledge.setCreatedBy(BigInteger.valueOf(createdBy));
+        knowledge.setCategoryId(BigInteger.valueOf(categoryId));
+        knowledge.setVisibilityScope(visibilityScope);
+        return knowledge;
+    }
+
+    private Map<String, Object> buildPublishedBinding(long knowledgeId, RetrievalMode retrievalMode) {
+        Map<String, Object> binding = new HashMap<>();
+        binding.put("knowledgeId", String.valueOf(knowledgeId));
+        binding.put("retrievalMode", retrievalMode.name());
+        return binding;
+    }
+
+    private tech.easyflow.ai.service.DocumentCollectionService mockDocumentCollectionService(DocumentCollection... collections) {
+        Map<BigInteger, DocumentCollection> knowledgeMap = new HashMap<>();
+        for (DocumentCollection collection : collections) {
+            knowledgeMap.put(collection.getId(), collection);
+        }
+        return (tech.easyflow.ai.service.DocumentCollectionService) Proxy.newProxyInstance(
+                tech.easyflow.ai.service.DocumentCollectionService.class.getClassLoader(),
+                new Class<?>[]{tech.easyflow.ai.service.DocumentCollectionService.class},
+                (proxy, method, args) -> {
+                    if ("getPublishedById".equals(method.getName()) && args != null && args.length == 1 && args[0] instanceof BigInteger knowledgeId) {
+                        return knowledgeMap.get(knowledgeId);
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private CategoryPermissionService mockCategoryPermissionService(RoleCategoryAccessSnapshot accessSnapshot) {
+        return (CategoryPermissionService) Proxy.newProxyInstance(
+                CategoryPermissionService.class.getClassLoader(),
+                new Class<?>[]{CategoryPermissionService.class},
+                (proxy, method, args) -> {
+                    if ("getAccess".equals(method.getName())) {
+                        return accessSnapshot;
+                    }
+                    if ("isSuperAdmin".equals(method.getName())) {
+                        return accessSnapshot.isSuperAdmin();
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private SysDeptService mockSysDeptService(Set<BigInteger> deptIds) {
+        Set<BigInteger> readableDeptIds = deptIds == null ? Collections.emptySet() : deptIds;
+        return (SysDeptService) Proxy.newProxyInstance(
+                SysDeptService.class.getClassLoader(),
+                new Class<?>[]{SysDeptService.class},
+                (proxy, method, args) -> {
+                    if ("getSelfAndAncestorDeptIds".equals(method.getName())) {
+                        return readableDeptIds;
+                    }
+                    if ("canUserAccessDeptScopedResource".equals(method.getName())) {
+                        BigInteger resourceDeptId = (BigInteger) args[1];
+                        return readableDeptIds.contains(resourceDeptId);
+                    }
+                    return defaultValue(method.getReturnType());
+                }
+        );
+    }
+
+    private Set<BigInteger> setOf(BigInteger... values) {
+        Set<BigInteger> result = new LinkedHashSet<>();
+        Collections.addAll(result, values);
+        return result;
+    }
+
+    private Object defaultValue(Class<?> returnType) {
+        if (returnType == boolean.class) {
+            return false;
+        }
+        if (returnType == int.class) {
+            return 0;
+        }
+        if (returnType == long.class) {
+            return 0L;
+        }
+        return null;
+    }
+}