Package org.apache.juneau.rest.server.mcp

Class McpContentBlock

java.lang.Object

org.apache.juneau.rest.server.mcp.McpContentBlock

public final class McpContentBlock
extends Object

Revision-neutral content block returned by tool calls and prompt messages.

Carries all three variants supported today — text, image, and embedded resource — so a handler cannot express less through the neutral model than it can through a wire bean. Supersedes the wire-level Content dictionary and its three leaf types.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	McpContentBlock.Kind	Which content variant is populated.

Method Summary

Modifier and Type	Method	Description
String	data()	The base64 image payload.
static McpContentBlock	image(String data, String mimeType)	Creates an image content block.
McpContentBlock.Kind	kind()	Which variant this block carries.
String	mimeType()	The image media type.
McpResourceContents	resource()	The embedded resource payload.
static McpContentBlock	resource(McpResourceContents resource)	Creates an embedded-resource content block.
String	text()	The text payload.
static McpContentBlock	text(String text)	Creates a text content block.

Methods inherited from class java.lang.Object

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

Method Details

text

public static McpContentBlock text(String text)

Creates a text content block.

Parameters:

text - The text. Can be null.

Returns:

A new block. Never null.

image

public static McpContentBlock image(String data,
 String mimeType)

Creates an image content block.

Parameters:

data - Base64-encoded image bytes. Can be null.

mimeType - The image media type. Can be null.

Returns:

A new block. Never null.

resource

public static McpContentBlock resource(McpResourceContents resource)

Creates an embedded-resource content block.

Parameters:

resource - The embedded payload. Can be null.

Returns:

A new block. Never null.

kind

public McpContentBlock.Kind kind()

Which variant this block carries.

Returns:

The variant. Never null.

text

public String text()

The text payload.

Returns:

The text, or null unless this is a McpContentBlock.Kind.TEXT block.

data

public String data()

The base64 image payload.

Returns:

The data, or null unless this is a McpContentBlock.Kind.IMAGE block.

mimeType

public String mimeType()

The image media type.

Returns:

The media type, or null unless this is a McpContentBlock.Kind.IMAGE block.

resource

public McpResourceContents resource()

The embedded resource payload.

Returns:

The payload, or null unless this is a McpContentBlock.Kind.RESOURCE block.