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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.log4j.chainsaw.prefs;
18  
19  import java.util.*;
20  
21  /**
22   * @author Paul Smith <psmith@apache.org>
23   */
24  public class LoadSettingsEvent extends SettingsEvent {
25  
26      LoadSettingsEvent(Object source, Properties properties) {
27          super(source);
28          this.properties = properties;
29      }
30  
31      public String getSetting(String key) {
32          return properties.getProperty(key);
33      }
34  
35      public boolean asBoolean(String key) {
36          return Boolean.valueOf(getSetting(key));
37      }
38  
39      public int asInt(String key) {
40          String val = getSetting(key);
41          try {
42              return Integer.parseInt(val);
43          } catch (NumberFormatException e) {
44              e.printStackTrace();
45              throw new RuntimeException(
46                  "An error occurred retrieving the Integer value of the setting '"
47                      + key
48                      + "'");
49          }
50  
51      }
52  
53      private final Properties properties;
54  
55      /**
56       * Returns an unmodifiable Collection of values whose
57       * setting key begins (String.startsWith()) the specified
58       * string.
59       *
60       * @param string
61       */
62      public Collection getSettingsStartingWith(String string) {
63          Collection c = new ArrayList();
64  
65          for (Map.Entry<Object, Object> objectObjectEntry : properties.entrySet()) {
66              Map.Entry<Object, Object> entry = objectObjectEntry;
67              if (entry.getKey().toString().startsWith(string)) {
68                  c.add(entry.getValue());
69              }
70          }
71  
72          return Collections.unmodifiableCollection(c);
73  
74      }
75  }