src/java/org/apache/log4j/chainsaw/prefs/LoadSettingsEvent.java

/*
 * Copyright 1999,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.log4j.chainsaw.prefs;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

/**
 * @author Paul Smith <psmith@apache.org>
 *
 */
public class LoadSettingsEvent extends SettingsEvent {

  LoadSettingsEvent(Object source, Properties properties) {
    super(source);
    this.properties = properties;
  }

  public String getSetting(String key) {
    return properties.getProperty(key);
  }
  
  public boolean asBoolean(String key) {
  	return Boolean.valueOf(getSetting(key)).booleanValue();
  }
  
  public int asInt(String key) {
    String val = getSetting(key);
    try {
      return Integer.parseInt(val);
    } catch (NumberFormatException e) {
      e.printStackTrace();
      throw new RuntimeException(
        "An error occurred retrieving the Integer value of the setting '"
          + key
          + "'");
      }

  }
  private final Properties properties;
  /**
   * Returns an unmodifiable Collection of values whose
   * setting key begins (String.startsWith()) the specified
   * string.
   * @param string
   */
  public Collection getSettingsStartingWith(String string)
  {
    Collection c = new ArrayList();
    
    for (Iterator iter = properties.entrySet().iterator(); iter.hasNext(); )
    {
      Map.Entry entry = (Map.Entry) iter.next();
      if(entry.getKey().toString().startsWith(string)) {
        c.add(entry.getValue());
      }
    }
    
    return Collections.unmodifiableCollection(c);
    
  }
}