| // |
| // ======================================================================== |
| // 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.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()); |
| } |
| } |