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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.websocket.common.message;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.StandardCharsets;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Utf8Appendable;
/**
* A CharBuffer wrapped with the Utf8Appendable logic.
*/
public class Utf8CharBuffer extends Utf8Appendable
{
/**
* Convenience method to wrap a ByteBuffer with a {@link Utf8CharBuffer}
*
* @param buffer
* the buffer to wrap
* @return the Utf8ByteBuffer for the provided ByteBuffer
*/
public static Utf8CharBuffer wrap(ByteBuffer buffer)
{
return new Utf8CharBuffer(buffer.asCharBuffer());
}
private final CharBuffer buffer;
private Utf8CharBuffer(CharBuffer buffer)
{
super(buffer);
this.buffer = buffer;
}
public void append(char[] cbuf, int offset, int size)
{
append(BufferUtil.toDirectBuffer(new String(cbuf,offset,size),StandardCharsets.UTF_8));
}
public void append(int c)
{
buffer.append((char)c);
}
public void clear()
{
buffer.position(0);
buffer.limit(buffer.capacity());
}
public ByteBuffer getByteBuffer()
{
// remember settings
int limit = buffer.limit();
int position = buffer.position();
// flip to flush
buffer.limit(buffer.position());
buffer.position(0);
// get byte buffer
ByteBuffer bb = StandardCharsets.UTF_8.encode(buffer);
// restor settings
buffer.limit(limit);
buffer.position(position);
return bb;
}
@Override
public int length()
{
return buffer.capacity();
}
public int remaining()
{
return buffer.remaining();
}
@Override
public String toString()
{
StringBuilder str = new StringBuilder();
str.append("Utf8CharBuffer@").append(hashCode());
str.append("[p=").append(buffer.position());
str.append(",l=").append(buffer.limit());
str.append(",c=").append(buffer.capacity());
str.append(",r=").append(buffer.remaining());
str.append("]");
return str.toString();
}
}
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