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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF1.2 features. A JSF1.2 implementation is required to use this version of the Tomahawk library.
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/*
 * 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.myfaces.custom.tree;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

/**
 * Default implementation of {@link MutableTreeNode}.
 *
 * @author Oliver Rossmueller 
 * @version $Revision: 472638 $ $Date: 2006-11-08 15:54:13 -0500 (Wed, 08 Nov 2006) $
 */
public class DefaultMutableTreeNode implements MutableTreeNode, Serializable
{

    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 children == null ? 
                null : Collections.unmodifiableCollection(children).iterator();
    }

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