import java.io.BufferedOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.FormattingResults;
import org.apache.fop.apps.MimeConstants;
import org.apache.fop.apps.PageSequenceResults;

import java.io.FileOutputStream;

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


class TestUriResolver implements URIResolver {

  @Override
  public Source resolve(String href, String base) throws TransformerException {
    if(href.endsWith(".png")) {
      File f=new File(href);
      System.out.println("resolve on "+href+" canRead returns " + f.canRead());
      return new StreamSource(new File(href));
    } else {
      return null;
    }
  }
}


public class FopUriResolver {
  
  public void run(String fileName) throws IOException {
    OutputStream out = null;

    try {
        FopFactory fopFactory= FopFactory.newInstance();
        FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
        foUserAgent.setURIResolver(new TestUriResolver());
        out = new FileOutputStream(fileName+".pdf");
        out = new BufferedOutputStream(out);
        Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = factory.newTransformer(); 
        Source src = new StreamSource(fileName+".fo");
        Result res = new SAXResult(fop.getDefaultHandler());
        transformer.transform(src, res);
    } catch (Exception e) {
        e.printStackTrace(System.err);
        System.exit(-1);
    } finally {
        out.close();
    }
  }

  public static void main(String[] args) throws IOException {
    new FopUriResolver().run("t1");
    new FopUriResolver().run("t2");
  }

}