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      1 /*
      2  * Copyright (c) 2009-2010 jMonkeyEngine
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  * * Redistributions of source code must retain the above copyright
     10  *   notice, this list of conditions and the following disclaimer.
     11  *
     12  * * Redistributions in binary form must reproduce the above copyright
     13  *   notice, this list of conditions and the following disclaimer in the
     14  *   documentation and/or other materials provided with the distribution.
     15  *
     16  * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
     17  *   may be used to endorse or promote products derived from this software
     18  *   without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 package com.jme3.network.serializing.serializers;
     34 
     35 import com.jme3.network.serializing.Serializer;
     36 import java.io.IOException;
     37 import java.nio.BufferOverflowException;
     38 import java.nio.ByteBuffer;
     39 
     40 /**
     41  * String serializer.
     42  *
     43  * @author Lars Wesselius
     44  */
     45 @SuppressWarnings("unchecked")
     46 public class StringSerializer extends Serializer {
     47 
     48     public String readObject(ByteBuffer data, Class c) throws IOException {
     49 
     50         int length = -1;
     51         byte type = data.get();
     52         if (type == (byte)0) {
     53             return null;
     54         } else if (type == (byte)1) {
     55             // Byte
     56             length = data.get();
     57         } else if (type == (byte)2) {
     58             // Short
     59             length = data.getShort();
     60         } else if (type == (byte)3) {
     61             // Int
     62             length = data.getInt();
     63         }
     64         if (length == -1) throw new IOException("Could not read String: Invalid length identifier.");
     65 
     66         byte[] buffer = new byte[length];
     67         data.get(buffer);
     68         return new String(buffer, "UTF-8");
     69     }
     70 
     71     public void writeObject(ByteBuffer buffer, Object object) throws IOException {
     72         String string = (String)object;
     73 
     74         if (string == null) {
     75             // Write that it's 0.
     76             buffer.put((byte)0);
     77             return;
     78         }
     79         byte[] stringBytes = string.getBytes("UTF-8");
     80         int bufferLength = stringBytes.length;
     81 
     82         try {
     83             if (bufferLength <= Byte.MAX_VALUE) {
     84                 buffer.put((byte)1);
     85                 buffer.put((byte)bufferLength);
     86             } else if (bufferLength <= Short.MAX_VALUE) {
     87                 buffer.put((byte)2);
     88                 buffer.putShort((short)bufferLength);
     89             } else {
     90                 buffer.put((byte)3);
     91                 buffer.putInt(bufferLength);
     92             }
     93             buffer.put(stringBytes);
     94         }
     95         catch (BufferOverflowException e) {
     96             e.printStackTrace();
     97         }
     98     }
     99 }
    100