001    /* $Id: SetPropertiesLoaderHandler.java 992073 2010-09-02 19:37:06Z simonetripodi $
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * 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, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.commons.digester.annotations.handlers;
019    
020    import java.lang.reflect.Field;
021    
022    import org.apache.commons.digester.annotations.DigesterLoaderHandler;
023    import org.apache.commons.digester.annotations.FromAnnotationsRuleSet;
024    import org.apache.commons.digester.annotations.providers.SetPropertiesRuleProvider;
025    import org.apache.commons.digester.annotations.rules.SetProperty;
026    
027    /**
028     * Handler that takes care to create the {@link SetPropertiesRuleProvider}.
029     *
030     * @since 2.1
031     */
032    public final class SetPropertiesLoaderHandler implements DigesterLoaderHandler<SetProperty, Field> {
033    
034        /**
035         * {@inheritDoc}
036         */
037        public void handle(SetProperty annotation, Field element, FromAnnotationsRuleSet ruleSet) {
038            SetPropertiesRuleProvider ruleProvider =
039                ruleSet.getProvider(annotation.pattern(), SetPropertiesRuleProvider.class);
040    
041            if (ruleProvider == null) {
042                ruleProvider = new SetPropertiesRuleProvider();
043                ruleSet.addRuleProvider(annotation.pattern(), ruleProvider);
044            }
045    
046            ruleProvider.addAlias(annotation, element);
047        }
048    
049    }