Examples

The software is expected to run on servers with multiple CPU cores. This example is multi-threaded because it is the standard use case.

package com.ricoh.pdf2pdfua.api.example;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.ricoh.pdf2pdfua.api.IControlFile;
import com.ricoh.pdf2pdfua.api.PDFUAException;
import com.ricoh.pdf2pdfua.api.PdfUaLoader;
import com.ricoh.pdf2pdfua.api.PdfUaOpt;
import com.ricoh.pdf2pdfua.api.Pdfua;
import com.ricoh.pdf2pdfua.api.preprocessor.PreprocessingException;

public class Pdf2PdfUaApiExample {
    static class ThreadSafeIterator {
        Iterator<File> i;

        ThreadSafeIterator(List<File> files) {
            i = files.iterator();
        }

        synchronized File next() {
            if (i.hasNext())
                return i.next();
            return null;
        }
    }

    static void exit(String msg) {
        System.err.println(msg);
        System.exit(1);
    }

    static File changeExtension(File f) {
        return new File(f.getAbsolutePath().replace(".pdf", ".ua.pdf"));
    }

    static Thread[] createThreadArray() {
        return new Thread[Runtime.getRuntime().availableProcessors()];
    }

    static void convertBatch(String controlFilePath, List<File> pdfs)
            throws PreprocessingException, InterruptedException {
        final Pdfua pdfuaInstance = PdfUaLoader.load();
        final IControlFile cf = pdfuaInstance.newControlFile(controlFilePath);
        final PdfUaOpt opt = pdfuaInstance.newOpt();
        final ThreadSafeIterator it = new ThreadSafeIterator(pdfs);
        Thread[] threads = createThreadArray();
        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Thread() {
                public void run() {
                    File pdfIn;
                    while ((pdfIn = it.next()) != null) {
                        try {
                            FileInputStream fis = new FileInputStream(pdfIn);
                            File out = changeExtension(pdfIn);
                            pdfuaInstance.run(fis, out, cf, opt);
                        } catch (FileNotFoundException | PDFUAException e) {
                            e.printStackTrace();
                        }
                    }
                }
            };
        }
        for (Thread t : threads)
            t.start();
        for (Thread t : threads)
            t.join();
        System.out.println("Batch complete!");
    }

    public static void main(String[] args)
            throws PreprocessingException, InterruptedException {
        if (args.length < 1)
            exit("No control file!");
        ArrayList<File> files = new ArrayList<>();
        for (int i = 1; i < args.length; i++)
            files.add(new File(args[i]));
        if (files.isEmpty())
            exit("No PDF file to convert!");
        convertBatch(args[0], files);
    }
}

This example illustrates how PDF2PDFUA can work without using files. This is useful when PDF2PDFUA is integrated in other systems such as web applications.

package com.ricoh.pdf2pdfua.api.example;

import java.io.FileInputStream;
import java.io.FileOutputStream;

import com.ricoh.pdf2pdfua.api.PdfUaLoader;
import com.ricoh.pdf2pdfua.api.Pdfua;

public class Pdf2PdfUaApiExampleBytesOutput {
    public static void main(String[] args) throws Exception {
        Pdfua ua = PdfUaLoader.load();
        byte[] outputBytes = ua.run(
            new FileInputStream("./untagged.pdf"),
            ua.newControlFile("./control-file.xml"),
            ua.newOpt()
        );
        var os = new FileOutputStream("./out.pdf");
        os.write(outputBytes);
        os.close();
    }
}