/**
* 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.cxf.jaxrs.provider;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.List;
import javax.ws.rs.NotAcceptableException;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
@Provider
public class CachingMessageBodyReader<T> extends AbstractCachingMessageProvider<T>
implements MessageBodyReader<T> {
private List<MessageBodyReader<T>> delegatingReaders;
public boolean isReadable(Class<?> type, Type gType, Annotation[] anns, MediaType mt) {
if (delegatingReaders != null) {
return getDelegatingReader(type, gType, anns, mt) != null;
} else {
return isProviderKeyNotSet();
}
}
private MessageBodyReader<T> getDelegatingReader(Class<?> type, Type gType, Annotation[] anns, MediaType mt) {
for (MessageBodyReader<T> reader: delegatingReaders) {
if (reader.isReadable(type, gType, anns, mt)) {
return reader;
}
}
return null;
}
public T readFrom(Class<T> type, Type gType, Annotation[] anns, MediaType mt,
MultivaluedMap<String, String> theheaders, InputStream is)
throws IOException, WebApplicationException {
this.setObject(
getReader(type, gType, anns, mt).readFrom(type, gType, anns, mt, theheaders, is));
return getObject();
}
protected MessageBodyReader<T> getReader(Class<?> type, Type gType, Annotation[] anns, MediaType mt) {
if (delegatingReaders != null) {
return getDelegatingReader(type, gType, anns, mt);
}
MessageBodyReader<T> r = null;
mc.put(ACTIVE_JAXRS_PROVIDER_KEY, this);
try {
@SuppressWarnings("unchecked")
Class<T> actualType = (Class<T>)type;
r = mc.getProviders().getMessageBodyReader(actualType, gType, anns, mt);
} finally {
mc.put(ACTIVE_JAXRS_PROVIDER_KEY, null);
}
if (r == null) {
org.apache.cxf.common.i18n.Message message =
new org.apache.cxf.common.i18n.Message("NO_MSG_READER", BUNDLE, type);
LOG.severe(message.toString());
throw new NotAcceptableException();
}
return r;
}
public void setDelegatingReader(MessageBodyReader<T> reader) {
this.delegatingReaders = Collections.singletonList(reader);
}
public void setDelegatingReaders(List<MessageBodyReader<T>> readers) {
this.delegatingReaders = readers;
}
}