001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019 package org.apache.fulcrum.yaafi.framework.configuration;
020
021 import java.util.Properties;
022
023 /**
024 * A implementation to provide out-of-the-box component configuration properties
025 * using the following algorithm:
026 *
027 * <ul>
028 * <li>add the user-supplied defaults to the result<li>
029 * <li>add the system properties to the result<li>
030 * <li>add the Merlin context entries to the result<li>
031 * </ul>
032 *
033 * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
034 */
035 public class ComponentConfigurationPropertiesResolverImpl
036 extends ComponentConfigurationPropertiesResolverBaseImpl
037 {
038 /**
039 * @see org.apache.fulcrum.yaafi.framework.configuration.ComponentConfigurationPropertiesResolver#resolve(java.util.Properties)
040 */
041 public Properties resolve(Properties defaults) throws Exception
042 {
043 String location = this.getLocation();
044 Properties result = this.loadProperties(location);
045
046 if(defaults != null)
047 {
048 result.putAll(defaults);
049 }
050
051 result.putAll(System.getProperties());
052 this.addAvalonContext(result);
053
054 return result;
055 }
056 }