/*
* 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 org.apache.clerezza.triaxrs.providers.provided;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import org.apache.clerezza.triaxrs.util.StreamDataSource;
/**
* This class wraps the Java Activation Framework functionality,
* so it can be use as <code>MessageBodyReader</code>.
* The function <code>isReadable()</code> is not supported, because
* this provider can not be provided through the
* <code>ProvidersImpl</code> class and therefore the function
* is not needed.
*
* @author mir
*/
public class JafMessageBodyReader<T> implements MessageBodyReader<T> {
@Override
public boolean isReadable(Class<?> type, Type genericType,
Annotation[] annotations, MediaType mediaType) {
throw new UnsupportedOperationException("Not supported");
}
@Override
public T readFrom(Class<T> type, Type genericType,
Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
throws IOException, WebApplicationException {
DataSource dataSource = new StreamDataSource(entityStream, mediaType
.toString());
DataHandler dataHandler = new DataHandler(dataSource);
try {
Object content = dataHandler.getContent();
if (content.getClass().isAssignableFrom(type)) {
return (T) content;
}
} catch (IOException ex) {
return null;
}
return null;
}
}