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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.client.util;
import java.nio.ByteBuffer;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* A {@link ContentProvider} for {@link ByteBuffer}s.
* <p />
* The position and limit of the {@link ByteBuffer}s passed to the constructor are not modified,
* and each invocation of the {@link #iterator()} method returns a {@link ByteBuffer#slice() slice}
* of the original {@link ByteBuffer}.
*/
public class ByteBufferContentProvider extends AbstractTypedContentProvider
{
private final ByteBuffer[] buffers;
private final int length;
public ByteBufferContentProvider(ByteBuffer... buffers)
{
this("application/octet-stream", buffers);
}
public ByteBufferContentProvider(String contentType, ByteBuffer... buffers)
{
super(contentType);
this.buffers = buffers;
int length = 0;
for (ByteBuffer buffer : buffers)
length += buffer.remaining();
this.length = length;
}
@Override
public long getLength()
{
return length;
}
@Override
public Iterator<ByteBuffer> iterator()
{
return new Iterator<ByteBuffer>()
{
private int index;
@Override
public boolean hasNext()
{
return index < buffers.length;
}
@Override
public ByteBuffer next()
{
try
{
ByteBuffer buffer = buffers[index];
buffers[index] = buffer.slice();
++index;
return buffer;
}
catch (ArrayIndexOutOfBoundsException x)
{
throw new NoSuchElementException();
}
}
@Override
public void remove()
{
throw new UnsupportedOperationException();
}
};
}
}
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