jsonobjectprovider.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 104 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.
 * Sun designates this particular file as subject to the "Classpath" exception
 * 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
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jersey.impl.provider.entity;


import com.sun.jersey.impl.ImplMessages;
import com.sun.jersey.impl.util.ThrowHelper;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 *
 * @author japod
 */
public class JSONObjectProvider  extends AbstractMessageReaderWriterProvider<JSONObject>{
    
    public JSONObjectProvider() {
        Class<?> c = JSONObject.class;
    }
    
    public boolean isReadable(Class<?> type, Type genericType, Annotation annotations[]) {
        return type == JSONObject.class;        
    }
    
    public JSONObject readFrom(
            Class<JSONObject> type, 
            Type genericType, 
            Annotation annotations[],
            MediaType mediaType, 
            MultivaluedMap<String, String> httpHeaders, 
            InputStream entityStream) throws IOException {
        try {
            return new JSONObject(readFromAsString(entityStream, mediaType));
        } catch (JSONException je) {
            throw ThrowHelper.withInitCause(je, new IOException(ImplMessages.ERROR_PARSING_JSON_OBJECT()));
        }
    }
    
    public boolean isWriteable(Class<?> type, Type genericType, Annotation annotations[]) {
        return type == JSONObject.class;        
    }
    
    public void writeTo(
            JSONObject t, 
            Class<?> type, 
            Type genericType, 
            Annotation annotations[], 
            MediaType mediaType, 
            MultivaluedMap<String, Object> httpHeaders,
            OutputStream entityStream) throws IOException {
        try {
            OutputStreamWriter writer = new OutputStreamWriter(entityStream, 
                    getCharset(mediaType, UTF8));
            t.write(writer);
            writer.write("\n");
            writer.flush();
        } catch (JSONException je) {
            throw ThrowHelper.withInitCause(je, new IOException(ImplMessages.ERROR_WRITING_JSON_OBJECT()));
        }
    }
}