com.feilong.lib.digester3.SetNextRule Maven / Gradle / Ivy

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package com.feilong.lib.digester3;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * 
 * Rule implementation that calls a method on the (top-1) (parent) object, passing the top object (child) as an
 * argument. It is commonly used to establish parent-child relationships.
 * 
 * 
 * This rule now supports more flexible method matching by default. It is possible that this may break (some) code
 * written against release 1.1.1 or earlier. See {@link #isExactMatch()} for more details.
 * 
 * 
 * Note that while CallMethodRule uses commons-beanutils' data-conversion functionality (ConvertUtils class) to convert
 * parameter values into the appropriate type for the parameter to the called method, this rule does not. Needing to use
 * ConvertUtils functionality when building parent-child relationships is expected to be very rare; however if you do
 * need this then instead of using this rule, create a CallMethodRule specifying targetOffset of 1 in the constructor.
 * 
 */
public class SetNextRule extends AbstractMethodRule{

    // ----------------------------------------------------------- Constructors

    /**
     * Construct a "set next" rule with the specified method name. The method's argument type is assumed to be the class
     * of the child object.
     * 
     * @param methodName
     *            Method name of the parent method to call
     */
    public SetNextRule(String methodName){
        super(methodName);
    }

    /**
     * Construct a "set next" rule with the specified method name.
     * 
     * @param methodName
     *            Method name of the parent method to call
     * @param paramType
     *            Java class name of the parent method's argument (if you wish to use a primitive type,
     *            specify the corresonding Java wrapper class instead, such as java.lang.Boolean
     *            for a boolean parameter)
     */
    public SetNextRule(String methodName, String paramType){
        super(methodName, paramType);
    }

    /**
     * Construct a "set next" rule with the specified method name.
     * 
     * @param methodName
     *            Method name of the parent method to call
     * @param paramType
     *            Java class of the parent method's argument (if you wish to use a primitive type, specify the
     *            corresonding Java wrapper class instead, such as java.lang.Boolean for a
     *            boolean parameter)
     */
    public SetNextRule(String methodName, Class paramType){
        super(methodName, paramType);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Object getChild(){
        return getDigester().peek(0);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Object getParent(){
        return getDigester().peek(1);
    }

}