/**
* 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.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.activation.DataHandler;
import javax.activation.DataSource;
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 javax.ws.rs.ext.Provider;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.jaxrs.ext.multipart.InputStreamDataSource;
@Provider
public class DataSourceProvider<T> implements MessageBodyReader<T>, MessageBodyWriter<T> {
private boolean useDataSourceContentType;
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) {
return isSupported(type, mt);
}
public T readFrom(Class<T> cls, Type genericType, Annotation[] annotations,
MediaType type,
MultivaluedMap<String, String> headers, InputStream is)
throws IOException {
DataSource ds = new InputStreamDataSource(is, type.toString());
return cls.cast(DataSource.class.isAssignableFrom(cls) ? ds : new DataHandler(ds));
}
public long getSize(T t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mt) {
return -1;
}
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) {
return isSupported(type, mt);
}
private boolean isSupported(Class<?> type, MediaType mt) {
return !mt.getType().equals("multipart")
&& (DataSource.class.isAssignableFrom(type) || DataHandler.class.isAssignableFrom(type));
}
public void writeTo(T src, Class<?> cls, Type genericType, Annotation[] annotations,
MediaType type, MultivaluedMap<String, Object> headers, OutputStream os)
throws IOException {
DataSource ds = DataSource.class.isAssignableFrom(cls)
? (DataSource)src : ((DataHandler)src).getDataSource();
if (useDataSourceContentType) {
setContentTypeIfNeeded(type, headers, ds.getContentType());
}
IOUtils.copy(ds.getInputStream(), os);
}
private void setContentTypeIfNeeded(MediaType type,
MultivaluedMap<String, Object> headers, String ct) {
if (!StringUtils.isEmpty(ct) && !type.equals(MediaType.valueOf(ct))) {
headers.putSingle("Content-Type", ct);
}
}
public void setUseDataSourceContentType(boolean useDataSourceContentType) {
this.useDataSourceContentType = useDataSourceContentType;
}
}