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 */
018package org.apache.commons.digester.annotations.providers;
019
020import org.apache.commons.digester.CallParamRule;
021import org.apache.commons.digester.annotations.AnnotationRuleProvider;
022import org.apache.commons.digester.annotations.reflect.MethodArgument;
023import 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 */
031public 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}