import java.io.*;

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.fop.apps.FopFactory;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.MimeConstants;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.pdf.PDFEncryptionParams;

/*

separator ; for windows; 

$ javac -cp 'fop-2.1.jar;xmlgraphics-commons-2.3.0-20170616.031120-4.jar' SimpleFop.java

$ java -cp 'fop-2.1.jar;xmlgraphics-commons-2.3.0-20170616.031120-4.jar;commons-logging-api-1.1.jar;commons-io-2.4.jar;batik-all-1.9.0-20170327.100521-31.jar;avalon-framework-impl-4.3.1.jar;avalon-framework-api-4.3.1.jar;.' SimpleFop

*/


public class SimpleFop {

    public static void main(String[] args) throws Exception {

	java.net.URI baseUri = new java.net.URI("./");

        FopFactory fopFactory = FopFactory.newInstance(baseUri);

        OutputStream out = new BufferedOutputStream(new FileOutputStream(new File("./myfile.pdf")));

        try {

            FOUserAgent foUserAgent = fopFactory.newFOUserAgent();

            String  pdfUserPassword = null;
            String  pdfOwnerPassword = null;
            boolean allowPrint = false;
            boolean allowCopyContent = true;
            boolean allowEditContent = true;
            boolean allowEditAnnotations = true;
            boolean encryptMetadata = false;
            String  pdfAMode = null;

            int encryptionLength  = 128;
            boolean allowFillInForms      = true;
            boolean allowAccessContent    = true;
            boolean allowAssembleDocument = true;
            boolean allowPrintHq          = true;

                        
            PDFEncryptionParams pdfEncryptionParams =  new PDFEncryptionParams(
                pdfUserPassword,  pdfOwnerPassword, allowPrint,
                allowCopyContent, allowEditContent, allowEditAnnotations,
                encryptMetadata);

        
            pdfEncryptionParams.setAllowFillInForms(allowFillInForms);
            pdfEncryptionParams.setAllowAccessContent(allowAccessContent);
            pdfEncryptionParams.setAllowAssembleDocument(allowAssembleDocument);
            pdfEncryptionParams.setAllowPrintHq(allowPrintHq);

            pdfEncryptionParams.setEncryptionLengthInBits(encryptionLength);

            pdfEncryptionParams.setAllowAccessContent(true);
            pdfEncryptionParams.setAllowAssembleDocument(true);
 
            foUserAgent.getRendererOptions().put("encryption-params", pdfEncryptionParams);

            Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);

            TransformerFactory factory = TransformerFactory.newInstance();
	    Transformer transformer = factory.newTransformer(new StreamSource(new File("./fop.simple.xml")));

	    Source src = new StreamSource(new java.io.StringReader("<?xml version=\"1.0\" encoding=\"utf-8\"?><root></root>"));

            Result res = new SAXResult(fop.getDefaultHandler());

            transformer.transform(src, res);

        } finally {
            out.close();
        }
    }

}