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    • ro.nextreports.server.api.client.XStreamXmlProvider Maven / Gradle / Ivy

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    /*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ro.nextreports.server.api.client;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;

import com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.CompactWriter;
import com.thoughtworks.xstream.io.xml.DomDriver;

/**
 * @author Decebal Suiu
 */
@Produces({ MediaType.APPLICATION_XML })
@Consumes({ MediaType.APPLICATION_XML })
@Provider
public class XStreamXmlProvider extends AbstractMessageReaderWriterProvider {
	
    private static final Set> processed = new HashSet>();
    private static final XStream xstream = new XStream(new DomDriver());
    private static final String DEFAULT_ENCODING = "utf-8";

    {
        xstream.setMode(XStream.NO_REFERENCES);
        xstream.autodetectAnnotations(true);
    }

    public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType arg3) {
        return true;
    }

    public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType arg3) {
    	return true;
    }

    protected static String getCharsetAsString(MediaType m) {
        if (m == null) {
            return DEFAULT_ENCODING;
        }
        String result = m.getParameters().get("charset");
        
        return (result == null) ? DEFAULT_ENCODING : result;
    }

    protected XStream getXStream(Class type) {
        synchronized (processed) {
            if (!processed.contains(type)) {
                xstream.processAnnotations(type);
                processed.add(type);
            }
        }
        
        return xstream;
    } 

    public Object readFrom(Class aClass, Type genericType, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap map, InputStream stream)
            throws IOException, WebApplicationException  {
        String encoding = getCharsetAsString(mediaType);
        XStream xStream = getXStream(aClass);
        
        return xStream.fromXML(new InputStreamReader(stream, encoding));
    }

    public void writeTo(Object o, Class aClass, Type type, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap map, OutputStream stream)
            throws IOException, WebApplicationException {
        String encoding = getCharsetAsString(mediaType);
        XStream xStream = getXStream(o.getClass());
        xStream.marshal(o, new CompactWriter(new OutputStreamWriter(stream, encoding)));
    }
    
}
    
    
    
    

    




    
    
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