httpresponsecontext.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 136 行

/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://jersey.dev.java.net/CDDL+GPL.html
 * or jersey/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at jersey/legal/LICENSE.txt.
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 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
package com.sun.jersey.api.core;

import java.io.IOException;
import java.io.OutputStream;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;

/**
 * An abstraction of a HTTP response.
 * <p>
 * The default state is a HTTP response with a status code of 204 
 * (No Content) with no headers and entity.
 */
public interface HttpResponseContext {

    /**
     * Get the response that was set.
     * 
     * @return the response.
     */
    Response getResponse();
    
    /**
     * Set the response state from a Response instance. This replaces a 
     * pre-existing response state.
     *
     * @param response the response.
     */
    void setResponse(Response response);
    
    /**
     * Set the response state from a Response instance. This replaces any 
     * pre-existing response state.
     *
     * @param response the response.
     * @param contentType the MIME media type to use for the Content-Type response
     *        header if the header is not set by the response.
     */
    void setResponse(Response response, MediaType contentType);

    /**
     * Check if the response has been set using the setReponse methods.
     * 
     * @return true if the response has been set.
     */
    boolean isResponseSet();
    
    /**
     * @return the status of the response
     */
    int getStatus();
    
    /**
     * Set the status of the response.
     * @param status the status.
     */
    void setStatus(int status);
    
    /**
     * @return the entity of the response.
     */
    Object getEntity();
    
    /**
     * Set the entity of the response
     * @param entity the entity.
     */
    void setEntity(Object entity);
    
    /**
     * Get the HTTP response headers. The returned map is case-insensitive
     * with respect to the keys (header values). The method {@link #setResponse} 
     * will replace any headers previously set.
     *
     * @return a mutable map of headerd.
     */
    MultivaluedMap<String, Object> getHttpHeaders();
    
    /**
     * Get an {@link OutputStream} to which an entity may be written.
     * <p>
     * The first byte written will result in the writing of thethe status code 
     * and headers.
     *
     * @return the output stream
     * @throws java.io.IOException if an IO error occurs
     */
    OutputStream getOutputStream() throws IOException;
    
    /**
     * Ascertain if a response has been committed to the container.
     * <p>
     * A response is committed if the status code, headers have been
     * written to the container.
     *  
     * @return true if the response has been committed.
     */
    boolean isCommitted();
}