Class DefaultMcpToolResultExtractor

java.lang.Object

dev.langchain4j.mcp.client.DefaultMcpToolResultExtractor

All Implemented Interfaces:

McpToolResultExtractor

public class DefaultMcpToolResultExtractor
extends Object
implements McpToolResultExtractor

Default extractor for MCP tool responses backed by content[].

This implementation preserves the existing client behavior: it only supports content items of type text, joins multiple text fragments with newline characters, and stores the result in ToolExecutionResult.resultText(). It does not apply to responses that contain structuredContent.

Constructor Summary

Constructors

Constructor	Description
DefaultMcpToolResultExtractor()

Method Summary

Modifier and Type	Method	Description
dev.langchain4j.service.tool.ToolExecutionResult	extract(com.fasterxml.jackson.databind.JsonNode content, boolean isError)	Extracts a ToolExecutionResult from CallToolResult.result.content[].

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DefaultMcpToolResultExtractor

public DefaultMcpToolResultExtractor()

Method Details

extract

public dev.langchain4j.service.tool.ToolExecutionResult extract(com.fasterxml.jackson.databind.JsonNode content,
 boolean isError)

Description copied from interface: McpToolResultExtractor

Extracts a ToolExecutionResult from CallToolResult.result.content[].

Specified by:

extract in interface McpToolResultExtractor

Parameters:

content - the MCP tool result content array.

isError - whether the tool response is marked as an application-level error.

Returns:

the extracted ToolExecutionResult.