treenode.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * 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 org.apache.myfaces.custom.tree;

import java.util.Iterator;

/**
 * Defines the requirements for an object that can be used as a tree node for
 * {@link HtmlTree}. (inspired by javax.swing.tree.TreeNode).
 * 
 * @author <a href="mailto:[e-mail]">Oliver Rossmueller </a>
 * @version $Revision: 1.6 $ $Date: 2005/02/11 00:54:02 $
 *
 *          $Log: TreeNode.java,v $
 *          Revision 1.6  2005/02/11 00:54:02  svieujot
 *          Revert changes commited to the wrong branch.
 *
 *          Revision 1.4  2004/11/26 12:14:10  oros
 *          MYFACES-8: applied tree table patch by David Le Strat
 *
 *  *  
 */
public interface TreeNode
{

    /**
     * @return Gets the user object of this node.
     */
    Object getUserObject();

    /**
     * Answer the child at the given index.
     */
    TreeNode getChildAt(int childIndex);

    /**
     * Answer the number of children this node contains.
     */
    int getChildCount();

    /**
     * Answer the parent of this node.
     */
    TreeNode getParent();

    /**
     * Answer the index of the given node in this node's children.
     */
    int getIndex(TreeNode node);

    /**
     * Answer true if this node allows children.
     */
    boolean getAllowsChildren();

    /**
     * Answer true if this is a leaf node.
     */
    boolean isLeaf();

    /**
     * Answer the children of the receiver. The base collection is unmodifyable.
     */
    Iterator children();

}