View Javadoc

    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 &lt;psmith@apache.org&gt;
    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  }