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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.message.internal;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.activation.DataSource;
/**
* Provider for marshalling/un-marshalling of {@code application/octet-stream}
* entity type to/from a {@link DataSource} instance.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
@Produces({"application/octet-stream", "*/*"})
@Consumes({"application/octet-stream", "*/*"})
public class DataSourceProvider extends AbstractMessageReaderWriterProvider {
/**
* Modified from javax.mail.util.ByteArrayDataSource
*
* A DataSource backed by a byte array. The byte array may be
* passed in directly, or may be initialized from an InputStream
* or a String.
*
* @since JavaMail 1.4
* @author John Mani
* @author Bill Shannon
* @author Max Spivak
*/
public static class ByteArrayDataSource implements DataSource {
private byte[] data;
private int len = -1;
private String type;
private String name = "";
static class DSByteArrayOutputStream extends ByteArrayOutputStream {
public byte[] getBuf() {
return buf;
}
public int getCount() {
return count;
}
}
public ByteArrayDataSource(InputStream is, String type) throws IOException {
DSByteArrayOutputStream os = new DSByteArrayOutputStream();
ReaderWriter.writeTo(is, os);
this.data = os.getBuf();
this.len = os.getCount();
/*
* ByteArrayOutputStream doubles the size of the buffer every time
* it needs to expand, which can waste a lot of memory in the worst
* case with large buffers. Check how much is wasted here and if
* it's too much, copy the data into a new buffer and allow the
* old buffer to be garbage collected.
*/
if (this.data.length - this.len > 256 * 1024) {
this.data = os.toByteArray();
this.len = this.data.length; // should be the same
}
this.type = type;
}
@Override
public InputStream getInputStream() throws IOException {
if (data == null) {
throw new IOException("no data");
}
if (len < 0) {
len = data.length;
}
return new ByteArrayInputStream(data, 0, len);
}
@Override
public OutputStream getOutputStream() throws IOException {
throw new IOException("cannot do this");
}
@Override
public String getContentType() {
return type;
}
@Override
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
@Override
public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return DataSource.class == type;
}
@Override
public DataSource readFrom(
Class type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap httpHeaders,
InputStream entityStream) throws IOException {
ByteArrayDataSource ds = new ByteArrayDataSource(entityStream,
(mediaType == null) ? null : mediaType.toString());
return ds;
}
@Override
public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return DataSource.class.isAssignableFrom(type);
}
@Override
public void writeTo(
DataSource t,
Class type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap httpHeaders,
OutputStream entityStream) throws IOException {
InputStream in = t.getInputStream();
try {
writeTo(in, entityStream);
} finally {
in.close();
}
}
}
