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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.common.support;
21  
22  import org.apache.mina.common.IoSession;
23  import org.apache.mina.common.WriteFuture;
24  
25  /**
26   * A default implementation of {@link WriteFuture}.
27   *
28   * @author The Apache Directory Project (mina-dev@directory.apache.org)
29   * @version $Rev: 599822 $, $Date: 2007-11-30 22:54:07 +0900 (Fri, 30 Nov 2007) $
30   */
31  public class DefaultWriteFuture extends DefaultIoFuture implements WriteFuture {
32      /**
33       * Returns a new {@link DefaultWriteFuture} which is already marked as 'written'.
34       */
35      public static WriteFuture newWrittenFuture(IoSession session) {
36          DefaultWriteFuture unwrittenFuture = new DefaultWriteFuture(session);
37          unwrittenFuture.setWritten(true);
38          return unwrittenFuture;
39      }
40  
41      /**
42       * Returns a new {@link DefaultWriteFuture} which is already marked as 'not written'.
43       */
44      public static WriteFuture newNotWrittenFuture(IoSession session) {
45          DefaultWriteFuture unwrittenFuture = new DefaultWriteFuture(session);
46          unwrittenFuture.setWritten(false);
47          return unwrittenFuture;
48      }
49  
50      /**
51       * Creates a new instance.
52       */
53      public DefaultWriteFuture(IoSession session) {
54          super(session);
55      }
56  
57      /**
58       * Creates a new instance which uses the specified object as a lock.
59       */
60      public DefaultWriteFuture(IoSession session, Object lock) {
61          super(session, lock);
62      }
63  
64      public boolean isWritten() {
65          if (isReady()) {
66              return (Boolean) getValue();
67          } else {
68              return false;
69          }
70      }
71  
72      public void setWritten(boolean written) {
73          setValue(written ? Boolean.TRUE : Boolean.FALSE);
74      }
75  }