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    1   /*
    2    * Copyright 2009 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * License.  You may obtain a copy of the License at:
    7    *
    8    *    http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.handler.codec.serialization;
    17
    18  import java.io.IOException;
    19  import java.io.ObjectOutputStream;
    20  import java.io.ObjectStreamClass;
    21  import java.io.OutputStream;
    22
    23  /**
    24   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    25   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    26   *
    27   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
    28   *
    29   */
    30  class CompactObjectOutputStream extends ObjectOutputStream {
    31
    32      static final int TYPE_FAT_DESCRIPTOR = 0;
    33      static final int TYPE_THIN_DESCRIPTOR = 1;
    34
    35      CompactObjectOutputStream(OutputStream out) throws IOException {
    36          super(out);
    37      }
    38
    39      @Override
    40      protected void writeStreamHeader() throws IOException {
    41          writeByte(STREAM_VERSION);
    42      }
    43
    44      @Override
    45      protected void writeClassDescriptor(ObjectStreamClass desc) throws IOException {
    46          Class<?> clazz = desc.forClass();
    47          if (clazz.isPrimitive() || clazz.isArray()) {
    48              write(TYPE_FAT_DESCRIPTOR);
    49              super.writeClassDescriptor(desc);
    50          } else {
    51              write(TYPE_THIN_DESCRIPTOR);
    52              writeUTF(desc.getName());
    53          }
    54      }
    55  }