defaultmutabletreenode.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.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

/**
 * Default implementation of {@link MutableTreeNode}.
 * 
 * @author <a href="mailto:[e-mail]">Oliver Rossmueller </a>
 * @version $Revision: 1.5 $ $Date: 2005/02/24 01:46:20 $
 *
 * $Log: DefaultMutableTreeNode.java,v $
 * Revision 1.5  2005/02/24 01:46:20  oros
 * fixed constructor to use List instead of ArrayList
 *
 * Revision 1.4  2004/11/26 12:14:10  oros
 * MYFACES-8: applied tree table patch by David Le Strat
 *
 *  
 */
public class DefaultMutableTreeNode implements MutableTreeNode
{

    private List children = new ArrayList();

    private Object userObject;

    MutableTreeNode parent;

    private boolean allowsChildren = true;

    /**
     * @param userObject The userObject.
     */
    public DefaultMutableTreeNode(Object userObject)
    {
        this.userObject = userObject;
    }

    /**
     * @param children The children.
     * @param allowsChildren The allowsChildren.
     */
    public DefaultMutableTreeNode(List children, boolean allowsChildren)
    {
        this.children = children;
        this.allowsChildren = allowsChildren;
    }

    /**
     * @param userObject The userobject.
     * @param parent The parent.
     * @param allowsChildren The allowsChildren.
     */
    public DefaultMutableTreeNode(Object userObject, MutableTreeNode parent, boolean allowsChildren)
    {
        this.userObject = userObject;
        this.parent = parent;
        this.allowsChildren = allowsChildren;
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#insert(org.apache.myfaces.custom.tree.MutableTreeNode)
     */
    public void insert(MutableTreeNode child)
    {
        children.add(child);
        child.setParent(this);
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#insert(org.apache.myfaces.custom.tree.MutableTreeNode, int)
     */
    public void insert(MutableTreeNode child, int index)
    {
        children.add(index, child);
        child.setParent(this);
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#remove(int)
     */
    public void remove(int index)
    {
        MutableTreeNode child = (MutableTreeNode) children.remove(index);
        child.setParent(null);
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#remove(org.apache.myfaces.custom.tree.MutableTreeNode)
     */
    public void remove(MutableTreeNode node)
    {
        if (children.remove(node))
        {
            node.setParent(null);
        }
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#setUserObject(java.lang.Object)
     */
    public void setUserObject(Object object)
    {
        this.userObject = object;
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getUserObject()
     */
    public Object getUserObject()
    {
        return userObject;
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#removeFromParent()
     */
    public void removeFromParent()
    {
        if (parent == null)
        {
            return;
        }
        parent.remove(this);
    }

    /**
     * @see org.apache.myfaces.custom.tree.MutableTreeNode#setParent(org.apache.myfaces.custom.tree.MutableTreeNode)
     */
    public void setParent(MutableTreeNode parent)
    {
        this.parent = parent;
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getChildAt(int)
     */
    public TreeNode getChildAt(int index)
    {
        return (TreeNode) children.get(index);
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getChildCount()
     */
    public int getChildCount()
    {
        return children.size();
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getParent()
     */
    public TreeNode getParent()
    {
        return parent;
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getIndex(org.apache.myfaces.custom.tree.TreeNode)
     */
    public int getIndex(TreeNode node)
    {
        return children.indexOf(node);
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#getAllowsChildren()
     */
    public boolean getAllowsChildren()
    {
        return allowsChildren;
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#isLeaf()
     */
    public boolean isLeaf()
    {
        return children.isEmpty();
    }

    /**
     * @see org.apache.myfaces.custom.tree.TreeNode#children()
     */
    public Iterator children()
    {
        return Collections.unmodifiableCollection(children).iterator();
    }

    /**
     * @see java.lang.Object#toString()
     */
    public String toString()
    {
        if (userObject != null)
        {
            return userObject.toString();
        }
        return super.toString();
    }
}