// Copyright 2004, 2005 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.tapestry.contrib.tree.simple;
import java.io.Serializable;
import java.util.Iterator;
import javax.swing.tree.TreePath;
import org.apache.tapestry.contrib.tree.model.ITreeDataModel;
import org.apache.tapestry.contrib.tree.model.ITreeNode;
/**
* @author ceco
*/
public class SimpleTreeDataModel implements ITreeDataModel, Serializable
{
private static final long serialVersionUID = 9215832847660213349L;
protected ITreeNode m_objRootNode;
/**
* Constructor for SimpleTreeDataModel.
*/
public SimpleTreeDataModel(ITreeNode objRootNode)
{
super();
m_objRootNode = objRootNode;
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getRoot()
*/
public Object getRoot()
{
return m_objRootNode;
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getChildCount(Object)
*/
public int getChildCount(Object objParent)
{
ITreeNode objParentNode = (ITreeNode) objParent;
return objParentNode.getChildCount();
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getChildren(Object)
*/
public Iterator getChildren(Object objParent)
{
ITreeNode objParentNode = (ITreeNode) objParent;
return objParentNode.getChildren().iterator();
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getObject(Object)
*/
public Object getObject(Object objUniqueKey)
{
if (objUniqueKey != null)
{
TreePath objPath = (TreePath) objUniqueKey;
return objPath.getLastPathComponent();
}
return null;
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getUniqueKey(Object,
* Object)
*/
public Object getUniqueKey(Object objTarget, Object objParentUniqueKey)
{
TreePath objPath = (TreePath) objParentUniqueKey;
Object objTargetUID = null;
if (objPath != null)
{
objTargetUID = objPath.pathByAddingChild(objTarget);
}
else
{
objTargetUID = new TreePath(objTarget);
}
return objTargetUID;
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#isAncestorOf(Object,
* Object)
*/
public boolean isAncestorOf(Object objTargetUniqueKey,
Object objParentUniqueKey)
{
TreePath objParentPath = (TreePath) objParentUniqueKey;
TreePath objTargetPath = (TreePath) objTargetUniqueKey;
boolean bResult = objParentPath.isDescendant(objTargetPath);
return bResult;
}
/**
* @see org.apache.tapestry.contrib.tree.model.ITreeDataModel#getParentUniqueKey
*/
public Object getParentUniqueKey(Object objChildUniqueKey)
{
TreePath objChildPath = (TreePath) objChildUniqueKey;
TreePath objParentPath = objChildPath.getParentPath();
if (objParentPath == null) return null;
return objParentPath.getLastPathComponent();
}
}