jsomcreatedomtree.java

Kohonen网络的学习过程可描述为：对于每一个网络的输入

package fi.javasom.jsom;
/**
 * This is JSomCreateDomTree class that creates a DOM tree of the map.
 * character data. This class itself does nothing, the
 * real processing is done by its subclasses.
 *
 *  Copyright (C) 2001  Tomi Suuronen
 *
 *  @version 1.0
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

import org.apache.xerces.dom.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.util.Date;
import java.text.SimpleDateFormat;
import fi.javasom.jsom.*;

public class JSomCreateDomTree
{
	private WeightVectors wVector;
	private JsomMap mapData;
	private int wSize; //the number of weight vectors
	private int aSize; //the number of authors
	private int x; //x cache
	private int y; //y cache
	private Document d;
	private Element mapnode; //cache
	private Element author; //cache
	private double[] locationCache;
	private String labelCache;
	private String projectName;
	private String projectCode;
	private String fileCode;
	private String fileDate;
	private double distance; //distance between nodes

	/**
	 * Constructor.
	 *
	 * @param WeightVectors wVector - weight vectors.
	 * @param JsomMap mapData - metadata information about the map.
	 * @param double distance - the distance between two nodes.
	*/
	public JSomCreateDomTree(WeightVectors wVector,JsomMap mapData,double distance)
	{
		this.wVector = wVector;
		this.mapData = mapData;
		this.distance = distance;
		wSize = wVector.getCount();
		aSize = mapData.getAuthorCount();
		projectName = mapData.getProjectName();
		projectCode = mapData.getProjectCode();
		fileCode = mapData.getFileCode();
		fileDate = mapData.getFileDate();

		/* resolves the current date and format */
		Date currentTime = new Date();
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy'-'MM'-'dd");

		/* starts creating the DOM tree */
		try
		{
			DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder dBuilder = dfactory.newDocumentBuilder();
			d = dBuilder.newDocument();
		}
		catch(Exception e)
		{
			System.out.println(e.getMessage());
		}
		Element jsommap = d.createElement("jsommap");
		Element meta = d.createElement("meta");

		meta.setAttribute("creationdate",formatter.format(currentTime));
		Element map = d.createElement("map");
		if(wVector.getLatticeType().equals("rect"))
		{
			map.setAttribute("width","" + (wVector.getXDimension() * (int)distance + 40));
			map.setAttribute("height","" + (wVector.getYDimension() * (int)distance + 40));
		}
		else //hexa
		{
			map.setAttribute("width","" + (wVector.getXDimension() * (int)distance + 40 + (int)(distance / 2.0)));
			map.setAttribute("height","" + (wVector.getYDimension() * (int)(distance * 0.87) + 40));
		}

		/* constructs the metadata part */
		if(!fileCode.equals("") || !fileDate.equals(""))
		{
			Element datafile = d.createElement("datafile");
			if(!fileCode.equals(""))
			{
				datafile.setAttribute("code",fileCode);
			}
			if(!fileDate.equals(""))
			{
				datafile.setAttribute("date",fileDate);
			}
			meta.appendChild(datafile);
		}
		if(!projectName.equals(""))
		{
			Element project = d.createElement("project");
			project.setAttribute("name",projectName);
			if(!projectCode.equals(""))
			{
				project.setAttribute("code",projectCode);
			}
			meta.appendChild(project);
		}
		if(aSize>0) //checks if there is any authors
		{
			Element author = d.createElement("author");
			for(int i=0;i<aSize;i++)
			{
				author = d.createElement("author");
				author.setAttribute("name",mapData.getAuthorNameAt(i));
				author.setAttribute("organization",mapData.getAuthorOrganizationAt(i));
				meta.appendChild(author.cloneNode(false));
			}
		}

		/* constructs the map part */
		for(int i=0;i<wSize;i++)
		{
			labelCache = wVector.getNodeLabelAt(i);
			locationCache = wVector.getNodeLocationAt(i);
			mapnode = d.createElement("mapnode");
			x = (int)(locationCache[0] * distance) + (int)distance;
			y = (int)(locationCache[1] * distance) + (int)distance;
			mapnode.setAttribute("x","" + x);
			mapnode.setAttribute("y","" + y);
			if(!labelCache.equals(""))
			{
				mapnode.setAttribute("label",labelCache);
			}
			map.appendChild(mapnode.cloneNode(false));
		}
		jsommap.appendChild(meta);
		jsommap.appendChild(map);
		d.appendChild(jsommap);
	}

	/**
	 *	Returns the creted DOM document tree.
	 *
	 * @return Document - document DOM tree.
	*/
	public Document getDomTreeDocument()
	{
		return d;
	}
}