/*
 * Copyright (c) 2005,2009 Declarative Engineering LLC.
 * All rights reserved.  This program and the accompanying materials
 * are made available under the terms of the Declarative Engineering LLC
 * verson 1 which accompanies this distribution, and is available at
 * http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
 */
package com.foundation.tcv.swt;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

/*
 * Encapsulates one node of data which is associated with an object in the table.
 */
public class TreeNodeData implements java.io.Externalizable {
	/** The object identifier for the row being added. */
	private int objectId;
	/** The data for the node. */
	private Object data;
	/** Whether the node could possibly have children. */
	private boolean canHaveChildren = false;
	
	/**
	 * TreeNodeData constructor.
	 */
	public TreeNodeData() {
	}//TreeNodeData()//
	/**
	 * TreeNodeData constructor.
	 * @param objectId The object identifier for the row being added.
	 * @param data The data for the node.
	 * @param canHaveChildren Whether the node could possibly have children.
	 */
	public TreeNodeData(int objectId, Object data, boolean canHaveChildren) {
		this.objectId = objectId;
		this.data = data;
		this.canHaveChildren = canHaveChildren;
	}//TreeNodeData()//
	/**
	 * Gets the object identifier for the row.
	 * @return The object identifier which identifies the object that is associated with the row of data.  Note that there can be more than one row per object id.
	 */
	public int getObjectId() {
		return objectId;
	}//getObjectId()//
	/**
	 * Determines whether the node could possibly have children.
	 * @return Whether the node might have children.
	 */
	public boolean canHaveChildren() {
		return canHaveChildren;
	}//canHaveChildren()//
	/**
	 * Gets the data used to display the node.
	 * @return The data for the node.
	 */
	public Object getData() {
		return data;
	}//getData()//
	/* (non-Javadoc)
	 * @see java.io.Externalizable#readExternal(java.io.ObjectInput)
	 */
	public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
		/*byte version = */in.readByte();
		objectId = in.readInt();
		data = in.readObject();
		canHaveChildren = in.readBoolean();
	}//readExternal()//
	/* (non-Javadoc)
	 * @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
	 */
	public void writeExternal(ObjectOutput out) throws IOException {
		out.writeByte(0);
		out.writeInt(objectId);
		out.writeObject(data);
		out.writeBoolean(canHaveChildren);
	}//writeExternal()//
}//TreeNodeData//