/*
 * Copyright 2004 Niall Pemberton
 * 
 * Licensed 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.
 */
package lib.framework.util;

import org.apache.commons.beanutils.DynaBean;
import org.apache.struts.validator.LazyValidatorForm;

/**
 * <p>Lazy <i>ActionForm</i> based on the <i>NestedLazyBean</i>
 *    implementation.</p>
 * 
 * <p><i>NestedLazyBean</i> overrides the default indexed type from being
 *     a <code>java.util.ArrayList</code> to an array of itself.</p>
 * 
 * <p>Combined with the power of the Struts <i>Nested</i> tags, 
 *    this implementation can nest ad infinitum.</p>
 * 
 * @author Niall Pemberton
 */
public class NestedLazyForm extends LazyValidatorForm {
    
    
   /**
    * Constructor which installs a (@link NestedLazyBean) as the DynaBean
    * backing this <i>Lazy</i> ActionForm.
    */
    public NestedLazyForm() {
        super(new NestedLazyBean());
    }
    
    /**
     * Override the <i>default</i> indexed bean property to be a NestedLazyBean.
     * This only affects <code>List</code> type indexed properties.
     * 
     * @return a new <code>NestedLazyBean</code>.
     */
    protected DynaBean newIndexedBean(String name) {
        return new NestedLazyBean();
    }

}