001    /* $Id: StackCallParamRuleProvider.java 992746 2010-09-05 09:31:53Z 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.providers;
019    
020    import org.apache.commons.digester.CallParamRule;
021    import org.apache.commons.digester.annotations.AnnotationRuleProvider;
022    import org.apache.commons.digester.annotations.reflect.MethodArgument;
023    import org.apache.commons.digester.annotations.rules.StackCallParam;
024    
025    /**
026     * Provides instances of {@link CallParamRule}.
027     *
028     * @see CallParamRule#CallParamRule(int,int)
029     * @since 2.1
030     */
031    public final class StackCallParamRuleProvider
032            implements AnnotationRuleProvider<StackCallParam, MethodArgument, CallParamRule> {
033    
034        private int paramIndex;
035    
036        private int stackIndex;
037    
038        /**
039         * {@inheritDoc}
040         */
041        public void init(StackCallParam annotation, MethodArgument element) {
042            this.paramIndex = element.getIndex();
043            this.stackIndex = annotation.stackIndex();
044        }
045    
046        /**
047         * {@inheritDoc}
048         */
049        public CallParamRule get() {
050            return new CallParamRule(this.paramIndex, this.stackIndex);
051        }
052    
053    }