package test;

import org.apache.log4j.Logger;
import java.io.File;
import java.io.OutputStream;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Source;
import javax.xml.transform.Result;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.sax.SAXResult;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;

/**
 *
 * @author blazek
 */
public class FopGen {

    static Logger logger = Logger.getLogger(FopGen.class);
    private String xconf;
    private String fontBase;
    private String xmlInput;
    private String xsltInput;
    private String pdfOutput;

    public FopGen() {
    }

    public FopGen(String xconf, String fontBase, String xmlInput, String xsltInput, String pdfOutput) {
        this.xconf = xconf;
        this.fontBase = fontBase;
        this.xmlInput = xmlInput;
        this.xsltInput = xsltInput;
        this.pdfOutput = pdfOutput;
    }

    public String getXconf() {
        return xconf;
    }

    public void setXconf(String xconf) {
        this.xconf = xconf;
    }

    public String getFontBase() {
        return fontBase;
    }

    public void setFontBase(String fontBase) {
        this.fontBase = fontBase;
    }

    public String getXmlInput() {
        return xmlInput;
    }

    public void setXmlInput(String xmlInput) {
        this.xmlInput = xmlInput;
    }

    public String getXsltInput() {
        return xsltInput;
    }

    public void setXsltInput(String xsltInput) {
        this.xsltInput = xsltInput;
    }

    public String getPdfOutput() {
        return pdfOutput;
    }

    public void setPdfOutput(String pdfOutput) {
        this.pdfOutput = pdfOutput;
    }        

    public boolean createPDF() {

        try {
            // configure fopFactory as desired
            FopFactory fopFactory = FopFactory.newInstance();

            // configure fonts
            fopFactory.setUserConfig(this.xconf);
            fopFactory.getFontManager().setFontBaseURL("file://" + this.fontBase);
            FOUserAgent foUserAgent = fopFactory.newFOUserAgent();

            // Setup output
            OutputStream out = new java.io.FileOutputStream(new File(this.pdfOutput));
            out = new java.io.BufferedOutputStream(out);

            try {
                // Construct fop with desired output format
                Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);

                // Setup XSLT
                TransformerFactory factory = TransformerFactory.newInstance();
                Transformer transformer = factory.newTransformer(new StreamSource(new File(this.xsltInput)));

                // Setup input for XSLT transformation
                Source src = new StreamSource(new File(this.xmlInput));

                // Resulting SAX events (the generated FO) must be piped through to FOP
                Result res = new SAXResult(fop.getDefaultHandler());

                // Start XSLT transformation and FOP processing
                transformer.transform(src, res);
            } finally {
                out.close();
            }
        } catch (Exception e) {
            e.printStackTrace(System.err);
            System.exit(-1);
        }

        return true;
    }
}