第 44 章 消息接口

package org.apache.camel;

import java.util.Map;
import java.util.Set;

import javax.activation.DataHandler;

public interface Message {

    String getMessageId();
    void setMessageId(String messageId);

    Exchange getExchange();

    boolean isFault();
    void    setFault(boolean fault);

    Object getHeader(String name);
    Object getHeader(String name, Object defaultValue);
    <T> T getHeader(String name, Class<T> type);
    <T> T getHeader(String name, Object defaultValue, Class<T> type);
    Map<String, Object> getHeaders();
    void setHeader(String name, Object value);
    void setHeaders(Map<String, Object> headers);
    Object  removeHeader(String name);
    boolean removeHeaders(String pattern);
    boolean hasHeaders();

    Object getBody();
    Object getMandatoryBody() throws InvalidPayloadException;
    <T> T  getBody(Class<T> type);
    <T> T  getMandatoryBody(Class<T> type) throws InvalidPayloadException;
    void     setBody(Object body);
    <T> void setBody(Object body, Class<T> type);

    DataHandler getAttachment(String id);
    Map<String, DataHandler> getAttachments();
    Set<String> getAttachmentNames();
    void removeAttachment(String id);
    void addAttachment(String id, DataHandler content);
    void setAttachments(Map<String, DataHandler> attachments);
    boolean hasAttachments();

    Message copy();

    void copyFrom(Message message);

    String createExchangeId();
}