//
// ========================================================================
// Copyright (c) 1995-2014 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.jsr356.decoders;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.websocket.DecodeException;
import javax.websocket.Decoder;
import javax.websocket.EndpointConfig;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.websocket.jsr356.samples.Fruit;
import org.eclipse.jetty.websocket.jsr356.samples.FruitBinaryEncoder;
/**
* Intentionally bad example of attempting to decode the same object to different message formats.
*/
public class BadDualDecoder implements Decoder.Text<Fruit>, Decoder.Binary<Fruit>
{
@Override
public Fruit decode(ByteBuffer bytes) throws DecodeException
{
try
{
int id = bytes.get(bytes.position());
if (id != FruitBinaryEncoder.FRUIT_ID_BYTE)
{
// not a binary fruit object
throw new DecodeException(bytes,"Not an encoded Binary Fruit object");
}
Fruit fruit = new Fruit();
fruit.name = getUTF8String(bytes);
fruit.color = getUTF8String(bytes);
return fruit;
}
catch (BufferUnderflowException e)
{
throw new DecodeException(bytes,"Unable to read Fruit from binary message",e);
}
}
@Override
public Fruit decode(String s) throws DecodeException
{
Pattern pat = Pattern.compile("([^|]*)|([^|]*)");
Matcher mat = pat.matcher(s);
if (!mat.find())
{
throw new DecodeException(s,"Unable to find Fruit reference encoded in text message");
}
Fruit fruit = new Fruit();
fruit.name = mat.group(1);
fruit.color = mat.group(2);
return fruit;
}
@Override
public void destroy()
{
}
private String getUTF8String(ByteBuffer buf)
{
int strLen = buf.getInt();
ByteBuffer slice = buf.slice();
slice.limit(slice.position() + strLen);
String str = BufferUtil.toUTF8String(slice);
buf.position(buf.position() + strLen);
return str;
}
@Override
public void init(EndpointConfig config)
{
}
@Override
public boolean willDecode(ByteBuffer bytes)
{
if (bytes == null)
{
return false;
}
int id = bytes.get(bytes.position());
return (id != FruitBinaryEncoder.FRUIT_ID_BYTE);
}
@Override
public boolean willDecode(String s)
{
if (s == null)
{
return false;
}
Pattern pat = Pattern.compile("([^|]*)|([^|]*)");
Matcher mat = pat.matcher(s);
return (mat.find());
}
}