net.derquinse.common.jaxrs.ByteSourceBodyWriter Maven / Gradle / Ivy
/*
* Copyright (C) the original author or authors.
*
* Licensed 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 net.derquinse.common.jaxrs;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import net.derquinse.common.io.MemoryByteSource;
import com.google.common.io.ByteSource;
/**
* {@link ByteSource} message body writer.
* @author Andres Rodriguez.
*/
@Provider
public final class ByteSourceBodyWriter implements MessageBodyWriter {
/** Default constructor. */
public ByteSourceBodyWriter() {
}
@Override
public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return ByteSource.class.isAssignableFrom(type);
}
@Override
public long getSize(ByteSource t, Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
if (t instanceof MemoryByteSource) {
return ((MemoryByteSource) t).size();
}
return -1;
}
@Override
public void writeTo(ByteSource t, Class type, Type genericType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap httpHeaders, OutputStream entityStream) throws IOException,
WebApplicationException {
t.copyTo(entityStream);
}
}