/**
 * Feel free to use this code as a starting point for your own Application.
 * 
 * This code is provided 'as is' with no warranty, either express or implied, of
 * any kind.
 * 
 * We don't recemmend the use of this code in Nuclear Reactors or any space
 * related application which requires the calculation of a coefficient
 * for gravity.
 * 
 * Please report any errors or suggestions to support@luansil.com.
 * 
 * @author Greg Gaffney, Lunasil Ltd.
 */

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.net.URL;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder;
import org.apache.commons.logging.impl.SimpleLog;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

import com.lunasil.xf.XincEngine;

/**
 * This Class shows how to use XincEngine to create 
 * PDF documents from Java. 
 * 
 * In this sample the setUp() method is called first to
 * do things like loading configuration and creating a logger.
 * Documents are then formatted and finally tearDown() is called
 * to do any final clean up work.
 */
public class ApiDemo2
{
	
	
	public void
	setUp() throws Exception
	{
		SimpleLog logger = new SimpleLog("Test");
		logger.setLevel(SimpleLog.LOG_LEVEL_WARN);
		XincEngine.setLogger(logger);
	}
	
	public void
	tearDown() throws Exception
	{
	}


	public XMLReader
	createXMLReader() throws SAXException
	{
		XMLReader xReader = null;

		try
		{
			xReader = XMLReaderFactory.createXMLReader();
		}
		catch (SAXException e)
		{
			// This should work in JRE 1.4.1
			try
			{
				xReader = XMLReaderFactory.createXMLReader(
					"org.apache.crimson.parser.XMLReaderImpl");
			}
			catch (SAXException e2)
			{
			}
			
			// This should work if we're using xalan-j 2.5.1
			if (xReader == null)
			{
				try
				{
					xReader = XMLReaderFactory.createXMLReader(
						"org.apache.xerces.parsers.SAXParser");
				}
				catch (SAXException e1)
				{
				}
			}
			
			// If all else fails, throw the original exception...
			if (xReader == null)
				throw e;
		}

		// These features are required.
        xReader.setFeature(
			"http://xml.org/sax/features/namespaces",
			true);
        xReader.setFeature(
			"http://xml.org/sax/features/namespace-prefixes",
			true);

		return xReader;
	}

	
	

	/**
	 * This is an example of using XincEngine to do the formatting of
	 * a simple Fo file.
	 * 
	 * @throws Exception
	 */
	public void
	test1()	throws Exception
	{
		String foFileName = "http://www.lunasil.com/samples/helloworld.fo";
		String outputFileName = "/helloworld.pdf";
		URL baseUrl = new URL(foFileName);

		XincEngine x = new XincEngine();

		// This is optional. Pdf is the default.
		x.setRenderer("Pdf");

		// A base URL needs to be set so that relative URL's can
		// be resolved. Relative URL's are typically encountered in
		// external-graphic elements.
		x.setBaseUrl(baseUrl);

		// Uncomment these lines if you want to specify your own
		// distinct configuration.
//		DefaultConfigurationBuilder builder = new DefaultConfigurationBuilder();
//		Configuration config = builder.buildFromFile("xincconfig.xml");
//		formatter.setConfiguration(config);

		FileOutputStream fos = new FileOutputStream(outputFileName);
		BufferedOutputStream bos = new BufferedOutputStream(fos, 0x4000);

		x.setOutputStream(bos);

		// Don't create the Content Handler until you have finished
		// configuring the XincEngine instance.
		ContentHandler ch = x.createContentHandler();

		XMLReader xReader = createXMLReader();
		xReader.setContentHandler(ch);
		xReader.parse(foFileName);
		bos.close();
		fos.close();
	}

	/**
	 * This is an example of using the XincEngine to do the formatting of
	 * an XML document using a stylesheet.
	 * 
	 * @throws Exception
	 */
	public void
	test2()	throws Exception
	{
		String xmlFileName = "http://www.lunasil.com/samples/ReportData.xml";
		String styleFileName = "http://www.lunasil.com/samples/ReportStyle.xsl";
		String outputFileName = "/ReportStyle.pdf";
		URL baseUrl = new URL(xmlFileName);

		XincEngine x = new XincEngine();
		x.setBaseUrl(baseUrl);

		FileOutputStream fos = new FileOutputStream(outputFileName);
		BufferedOutputStream bos = new BufferedOutputStream(fos, 0x4000);
		x.setOutputStream(bos);

		StreamSource docSource = new StreamSource(xmlFileName);
		Source styleSource = new StreamSource(styleFileName);

		ContentHandler ch = x.createContentHandler();
		Result saxResult = new SAXResult(ch);

	 	TransformerFactory fact = TransformerFactory.newInstance();
	 	Transformer transformer = fact.newTransformer(styleSource);
	 	transformer.transform(docSource, saxResult);
		bos.close();
		fos.close();
	}

	
	
	public static void main(String[] args) throws Exception
	{
		ApiDemo2 demo = new ApiDemo2();
		
		demo.setUp();
		demo.test1();
		demo.test2();
		demo.tearDown();
	}

}