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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.ArrayList;
20  import java.util.Collection;
21  import java.util.Collections;
22  import java.util.Iterator;
23  import java.util.Map;
24  import java.util.Properties;
25  
26  /**
27   * @author Paul Smith <psmith@apache.org>
28   *
29   */
30  public class LoadSettingsEvent extends SettingsEvent {
31  
32    LoadSettingsEvent(Object source, Properties properties) {
33      super(source);
34      this.properties = properties;
35    }
36  
37    public String getSetting(String key) {
38      return properties.getProperty(key);
39    }
40    
41    public boolean asBoolean(String key) {
42    	return Boolean.valueOf(getSetting(key)).booleanValue();
43    }
44    
45    public int asInt(String key) {
46      String val = getSetting(key);
47      try {
48        return Integer.parseInt(val);
49      } catch (NumberFormatException e) {
50        e.printStackTrace();
51        throw new RuntimeException(
52          "An error occurred retrieving the Integer value of the setting '"
53            + key
54            + "'");
55        }
56  
57    }
58    private final Properties properties;
59    /**
60     * Returns an unmodifiable Collection of values whose
61     * setting key begins (String.startsWith()) the specified
62     * string.
63     * @param string
64     */
65    public Collection getSettingsStartingWith(String string)
66    {
67      Collection c = new ArrayList();
68      
69      for (Iterator iter = properties.entrySet().iterator(); iter.hasNext(); )
70      {
71        Map.Entry entry = (Map.Entry) iter.next();
72        if(entry.getKey().toString().startsWith(string)) {
73          c.add(entry.getValue());
74        }
75      }
76      
77      return Collections.unmodifiableCollection(c);
78      
79    }
80  }