jsommapoutput.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 JSomMapOutput class that outputs the map in wanted format.
 *
 *  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 fi.javasom.jsom.*;
import java.io.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import javax.xml.parsers.*;
import org.apache.xerces.dom.*;
import org.w3c.dom.*;
import org.apache.fop.apps.*;
import org.apache.fop.render.pdf.*;
import org.xml.sax.*;

public class JSomMapOutput
{
	private File folder;
	private File cache;
	private JSomCreateDomTree dom; //DOM tree.
	private String fileName; //name of the file to be created.
	private String xslfile; //XSL file to be used.
	private String paper; //the size of a paper for pdf.
	private String orientation; //orientation of a paper for pdf.
	private StringWriter embedSVG; //embedded SVG code.
	private JsomMap map; //information about the map.

	/**
	 * Constructor.
	 *
	 * @param File folder - Output folder.
	 * @param DocuemntImpl dom - Document DOM tree.
	 * @param String paper - the size of the paper :: a4 | letter
	 * @param String orientation - the orientation of the paper :: portrait || landscape
	 * @param JsomMap map - the information about the map
	*/
	public JSomMapOutput(File folder,JSomCreateDomTree dom,String paper,String orientation, JsomMap map)
	{
		this.folder = folder;
		this.dom = dom;
		this.paper = paper;
		this.orientation = orientation;
		this.map = map;
	}

	/**
	 * Outputs the map in the specified format with a specific name.
	 *
	 * @param String type = Type of the map:: xml | svg | pdf.
	 * @param String fileName = name of the file (without a suffix).
	*/
	public void outputMap(String type,String fileName)
	{
		this.fileName = fileName;
		type = type.toLowerCase();
		if(type.equals("pdf"))
		{
			try
			{
				cache = new File(folder,fileName+"."+type);
				xslfile = "jsom_svg_pdf.xsl";
				embedSVG = new StringWriter(); // Creates an empy StringWriter object for the output.
				transform("pdf");
				XMLReader parser = (XMLReader)new org.apache.xerces.parsers.SAXParser();
				FopConstructor fc = new FopConstructor(paper,orientation,embedSVG.toString());
				Driver driver = new Driver();
				driver.setRenderer("org.apache.fop.render.pdf.PDFRenderer",Version.getVersion());
				driver.addElementMapping("org.apache.fop.fo.StandardElementMapping");
				driver.addElementMapping("org.apache.fop.svg.SVGElementMapping");
				driver.addPropertyList("org.apache.fop.fo.StandardPropertyListMapping");
				driver.addPropertyList("org.apache.fop.svg.SVGPropertyListMapping");
				driver.setOutputStream(new FileOutputStream(cache));
				driver.buildFOTree(parser,new org.xml.sax.InputSource(new StringReader(fc.getFopString())));
				driver.format();
				driver.render();
			}
			catch(Exception e)
			{
				System.out.println(e.getMessage());
			}
		}
		else //XML and SVG
		{
			if(type.equals("xml"))
			{
				xslfile = "jsom_copier.xsl";
			}
			else //svg
			{
				xslfile = "jsom_svg.xsl";
			}
			cache = new File(folder,fileName+"."+type);
			transform("save");
		}
	}

	/*
	 * Makes the transformation.
	 *
	 * @param String function - type of transformation. save (saves into a file) | pdf.
	*/
	private void transform(String function)
	{
		/* Uses TRAX API to transform the data */
		try
		{
			TransformerFactory tFactory = TransformerFactory.newInstance();
			Transformer transformer = tFactory.newTransformer(new StreamSource(xslfile));
			if(function.equals("save"))
			{
				transformer.transform(new DOMSource(dom.getDomTreeDocument()),new StreamResult(cache));
			}
			else //pdf
			{
				transformer.transform(new DOMSource(dom.getDomTreeDocument()),new javax.xml.transform.stream.StreamResult(embedSVG));
			}
		}
		catch(Exception e)
		{
			System.out.println(e.getMessage());
		}
	}

	/*********************************************************************************/

	/*
	 * Constructs the XSL Formatting Objects as a DocumentImpl.
	*/
	private class FopConstructor
	{
		private String row;

		/**
		 * Constructor.
		 *
		 * @param String paper - the size of the paper :: A4 | Letter
		 * @param String orientation - the orientation of the paper :: Portrait || Landscape
		*/
		public FopConstructor(String paper, String orientation, String svg)
		{
			String height = "", width = "", papert = "";
			row = "";
			if(paper.toLowerCase().equals("a4"))
			{
				papert = "A4";
				if(orientation.toLowerCase().equals("portrait"))
				{
					height = "297mm";
					width = "210mm";
				}
				else //landscape
				{
					height = "210mm";
					width = "297mm";
				}
			}
			else //letter
			{
				papert = "Letter";
				if(orientation.toLowerCase().equals("portrait"))
				{
					height = "279mm";
					width = "216mm";
				}
				else //landscape
				{
					height = "216mm";
					width = "279mm";
				}
			}
			row += "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
			row += "<fo:root xmlns:fo=\"http://www.w3.org/1999/XSL/Format\">";
			row += "<fo:layout-master-set>";
			row += "<fo:simple-page-master master-name=\""+papert+"\" page-height=\""+height+"\" page-width=\""+width+"\" margin-top=\"10mm\" margin-bottom=\"10mm\" margin-left=\"10mm\" margin-right=\"10mm\">";
			row += "<fo:region-body margin-top=\"0mm\"/>";
			row += "<fo:region-after extent=\"20mm\"/>";
			row += "</fo:simple-page-master>";
			row += "</fo:layout-master-set>";
			row += "<fo:page-sequence master-name=\""+papert+"\" >";
			row += "<fo:static-content flow-name=\"xsl-region-after\">";
			row += "<fo:block text-align=\"start\" font-size=\"10pt\" font-family=\"Helvetica\" line-height=\"12pt\" border-top-width=\"thin\">";
			row += "<fo:inline font-weight=\"bold\">Project name:</fo:inline> "+map.getProjectName();
			row += "</fo:block>";
			row += "<fo:block text-align=\"start\" font-size=\"10pt\" font-family=\"Helvetica\" line-height=\"12pt\" >";
			row += "<fo:inline font-weight=\"bold\">Project code:</fo:inline> "+map.getProjectCode();
			row += "</fo:block>";
			row += "<fo:block text-align=\"start\" font-size=\"10pt\" font-family=\"Helvetica\" line-height=\"12pt\" >";
			row += "<fo:inline font-weight=\"bold\">Identifier:</fo:inline> "+fileName;
			row += "</fo:block>";
			row += "<fo:block text-align=\"end\" font-size=\"10pt\" font-family=\"Helvetica\" line-height=\"12pt\" >";
			row += "p. <fo:page-number/>";
			row += "</fo:block>";
    	row += "</fo:static-content>";
			row += "<fo:flow flow-name=\"xsl-region-body\">";
			row += "<fo:block>";
			row += "<fo:instream-foreign-object>";
			/* start of SVG data addition */
			row += svg;
			/* end of SVG data addition */
			row += "</fo:instream-foreign-object>";
			row += "</fo:block>";
			row += "</fo:flow>";
			row += "</fo:page-sequence>";
			row += "</fo:root>";
		}

		/**
		 * Builds the XSL Formatting Objects as a string.
		 *
		 * @return String - the XSL FO document.
		*/
		public String getFopString()
		{
			return row;
		}
	}
}