xmllistattribute.java

structs源码

/*
 * $Id: XmlListAttribute.java 471754 2006-11-06 14:55:09Z husted $
 *
 * 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.
 */

package org.apache.struts.tiles.xmlDefinition;

import java.util.ArrayList;
import java.util.List;


/**
 * An attribute as a <code>List</code>.
 * This attribute associates a name with a list. The list can be found by the
 * property name.
 * Elements in list are retrieved using List methods.
 * This class is used to read configuration files.
 */
public class XmlListAttribute extends XmlAttribute
{
    /** List.
     * We declare a List to avoid cast.
     * Parent "value" property points to the same list.
     */
  private List list;

    /**
     * Constructor.
     */
  public XmlListAttribute()
    {
    list = new ArrayList();
    setValue(list);
    }

    /**
     * Constructor.
     * @param name Name.
     * @param value List.
     */
  public XmlListAttribute( String name, List value)
    {
    super( name, value );
    list = value;
    }

    /**
     * Add an element in list.
     * We use a property to avoid rewriting a new class.
     * @param element XmlAttribute to add.
     */
  public void add( XmlAttribute element )
    {
    list.add( element.getValue() );
    }

    /**
     * Add an element in list.
     * @param value Object to add.
     */
  public void add( Object value )
    {
    //list.add( value );
      // To correct a bug in digester, we need to check the object type
      // Digester doesn't call correct method according to object type ;-(
    if(value instanceof XmlAttribute)
      {
      add((XmlAttribute)value);
      return;
      }
     else
      list.add( value );
    }

    /**
     * Add an element in list.
     * @param value Object to add.
     */
  public void addObject( Object value )
    {
    list.add( value );
    }



}