/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.launcher;
/**
* Internal class used to store tree structures of ItemDescriptors
*/
class ItemTreeNode {
private ItemTreeNode nextSibling;
private ItemTreeNode firstChild;
private ItemDescriptor descriptor;
/**
* Constructs a leaf ItemTreeNode with a given descriptor.
*
* @param descriptor the descriptor
*/
public ItemTreeNode(ItemDescriptor descriptor) {
this.descriptor = descriptor;
}
/**
* Adds a node to the Tree in sorted order by name.
*
* @param node the node to add. Note that node.nextSibling must be null
*/
public void addSortedNode(ItemTreeNode node) {
if (firstChild == null) {
firstChild = node;
} else if (firstChild.descriptor.getName().compareTo(node.descriptor.getName()) > 0) {
node.nextSibling = firstChild;
firstChild = node;
} else {
ItemTreeNode cursor;
for (cursor = firstChild; cursor.nextSibling != null; cursor = cursor.nextSibling) {
ItemTreeNode sibling = cursor.nextSibling;
if (sibling.descriptor.getName().compareTo(node.descriptor.getName()) > 0) break;
}
node.nextSibling = cursor.nextSibling;
cursor.nextSibling = node;
}
}
/**
* Returns the descriptor for this node.
*
* @return the descriptor
*/
public ItemDescriptor getDescriptor() {
return descriptor;
}
/**
* Returns the next sibling of this node.
*
* @return the next sibling, or null if none
*/
public ItemTreeNode getNextSibling() {
return nextSibling;
}
/**
* Returns the first child of this node.
*
* @return the first child, or null if none
*/
public ItemTreeNode getFirstChild() {
return firstChild;
}
}