/**
* 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.camel.component.cxf.jaxrs;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.BadRequestException;
import javax.ws.rs.InternalServerErrorException;
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.MessageBodyWriter;
import org.apache.camel.spi.DataFormat;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
public class DataFormatProvider<T> implements MessageBodyWriter<T>, MessageBodyReader<T> {
private Map<String, DataFormat> formats = new HashMap<String, DataFormat>();
@Override
public boolean isReadable(Class<?> cls, Type type, Annotation[] anns, MediaType mt) {
return getDataFormat(mt) != null;
}
@Override
public boolean isWriteable(Class<?> cls, Type type, Annotation[] anns, MediaType mt) {
return getDataFormat(mt) != null;
}
@Override
public T readFrom(Class<T> cls, Type type, Annotation[] anns, MediaType mt,
MultivaluedMap<String, String> headers, InputStream is) throws IOException,
WebApplicationException {
DataFormat format = getValidDataFormat(mt);
try {
@SuppressWarnings("unchecked")
T result = (T)format.unmarshal(null, is);
return result;
} catch (Exception ex) {
throw new BadRequestException(ex);
}
}
@Override
public long getSize(T obj, Class<?> cls, Type type, Annotation[] anns, MediaType mt) {
return -1;
}
@Override
public void writeTo(T obj, Class<?> cls, Type type, Annotation[] anns, MediaType mt,
MultivaluedMap<String, Object> headers, OutputStream os) throws IOException,
WebApplicationException {
DataFormat format = getValidDataFormat(mt);
try {
format.marshal(null, obj, os);
} catch (Exception ex) {
throw new InternalServerErrorException(ex);
}
}
public void setFormat(DataFormat format) {
setFormat(MediaType.WILDCARD, format);
}
public void setFormat(String mediaType, DataFormat format) {
formats.put(mediaType, format);
}
public void setFormats(Map<String, DataFormat> formats) {
this.formats.putAll(formats);
}
private DataFormat getValidDataFormat(MediaType mt) {
DataFormat format = getDataFormat(mt);
if (format == null) {
throw new InternalServerErrorException();
}
return format;
}
private DataFormat getDataFormat(MediaType mt) {
String type = JAXRSUtils.mediaTypeToString(mt);
DataFormat format = formats.get(type);
if (format != null) {
return format;
}
int subtypeIndex = type.lastIndexOf('+');
if (subtypeIndex != -1) {
// example, application/json+v1, should still be handled by JSON
// handler, etc
format = formats.get(type.substring(0, subtypeIndex));
}
if (format == null && formats.containsKey(MediaType.WILDCARD)) {
format = formats.get(MediaType.WILDCARD);
}
return format;
}
}