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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   *   https://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  package org.apache.commons.compress.harmony.pack200;
20  
21  import java.beans.PropertyChangeListener;
22  import java.beans.PropertyChangeSupport;
23  import java.io.IOException;
24  import java.util.SortedMap;
25  import java.util.TreeMap;
26  
27  /**
28   * Provides generic JavaBeans support for the Pack/UnpackAdapters
29   */
30  public abstract class Pack200Adapter {
31  
32      protected static final int DEFAULT_BUFFER_SIZE = 8192;
33  
34      private final PropertyChangeSupport support = new PropertyChangeSupport(this);
35  
36      private final SortedMap<String, String> properties = new TreeMap<>();
37  
38      public void addPropertyChangeListener(final PropertyChangeListener listener) {
39          support.addPropertyChangeListener(listener);
40      }
41  
42      /**
43       * Completion between 0..1.
44       *
45       * @param value Completion between 0..1.
46       * @throws IOException if the value cannot be parsed
47       */
48      protected void completed(final double value) throws IOException {
49          firePropertyChange("pack.progress", null, String.valueOf((int) (100 * value))); //$NON-NLS-1$
50      }
51  
52      /**
53       * Reports a property update to listeners
54       *
55       * @param propertyName name of property being updated
56       * @param oldValue old property value
57       * @param newValue new property value
58       * @throws IOException if the values cannot be parsed
59       */
60      protected void firePropertyChange(final String propertyName, final Object oldValue, final Object newValue) throws IOException {
61          support.firePropertyChange(propertyName, oldValue, newValue);
62      }
63  
64      public SortedMap<String, String> properties() {
65          return properties;
66      }
67  
68      public void removePropertyChangeListener(final PropertyChangeListener listener) {
69          support.removePropertyChangeListener(listener);
70      }
71  }