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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.mina.filter.codec.serialization;
21  
22  import java.io.DataOutputStream;
23  import java.io.IOException;
24  import java.io.ObjectOutput;
25  import java.io.OutputStream;
26  
27  import org.apache.mina.common.ByteBuffer;
28  
29  /**
30   * An {@link ObjectOutput} and {@link OutputStream} that can write the objects as
31   * the serialized form that {@link ObjectSerializationDecoder} can decode.
32   *
33   * @author The Apache Directory Project (mina-dev@directory.apache.org)
34   * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $
35   */
36  public class ObjectSerializationOutputStream extends OutputStream implements
37          ObjectOutput {
38  
39      private final DataOutputStream out;
40  
41      private int maxObjectSize = Integer.MAX_VALUE;
42  
43      public ObjectSerializationOutputStream(OutputStream out) {
44          if (out == null) {
45              throw new NullPointerException("out");
46          }
47  
48          if (out instanceof DataOutputStream) {
49              this.out = (DataOutputStream) out;
50          } else {
51              this.out = new DataOutputStream(out);
52          }
53      }
54  
55      /**
56       * Returns the allowed maximum size of the encoded object.
57       * If the size of the encoded object exceeds this value, this encoder
58       * will throw a {@link IllegalArgumentException}.  The default value
59       * is {@link Integer#MAX_VALUE}.
60       */
61      public int getMaxObjectSize() {
62          return maxObjectSize;
63      }
64  
65      /**
66       * Sets the allowed maximum size of the encoded object.
67       * If the size of the encoded object exceeds this value, this encoder
68       * will throw a {@link IllegalArgumentException}.  The default value
69       * is {@link Integer#MAX_VALUE}.
70       */
71      public void setMaxObjectSize(int maxObjectSize) {
72          if (maxObjectSize <= 0) {
73              throw new IllegalArgumentException("maxObjectSize: "
74                      + maxObjectSize);
75          }
76  
77          this.maxObjectSize = maxObjectSize;
78      }
79  
80      public void close() throws IOException {
81          out.close();
82      }
83  
84      public void flush() throws IOException {
85          out.flush();
86      }
87  
88      public void write(int b) throws IOException {
89          out.write(b);
90      }
91  
92      public void write(byte[] b) throws IOException {
93          out.write(b);
94      }
95  
96      public void write(byte[] b, int off, int len) throws IOException {
97          out.write(b, off, len);
98      }
99  
100     public void writeObject(Object obj) throws IOException {
101         ByteBuffer buf = ByteBuffer.allocate(64, false);
102         buf.setAutoExpand(true);
103         buf.putObject(obj);
104 
105         int objectSize = buf.position() - 4;
106         if (objectSize > maxObjectSize) {
107             buf.release();
108             throw new IllegalArgumentException(
109                     "The encoded object is too big: " + objectSize + " (> "
110                             + maxObjectSize + ')');
111         }
112 
113         out.write(buf.array(), 0, buf.position());
114         buf.release();
115     }
116 
117     public void writeBoolean(boolean v) throws IOException {
118         out.writeBoolean(v);
119     }
120 
121     public void writeByte(int v) throws IOException {
122         out.writeByte(v);
123     }
124 
125     public void writeBytes(String s) throws IOException {
126         out.writeBytes(s);
127     }
128 
129     public void writeChar(int v) throws IOException {
130         out.writeChar(v);
131     }
132 
133     public void writeChars(String s) throws IOException {
134         out.writeChars(s);
135     }
136 
137     public void writeDouble(double v) throws IOException {
138         out.writeDouble(v);
139     }
140 
141     public void writeFloat(float v) throws IOException {
142         out.writeFloat(v);
143     }
144 
145     public void writeInt(int v) throws IOException {
146         out.writeInt(v);
147     }
148 
149     public void writeLong(long v) throws IOException {
150         out.writeLong(v);
151     }
152 
153     public void writeShort(int v) throws IOException {
154         out.writeShort(v);
155     }
156 
157     public void writeUTF(String str) throws IOException {
158         out.writeUTF(str);
159     }
160 }