Search & replace PDF text or images in Java

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

package com.pdftron.android.pdfnetsdksamples.samples;

import com.pdftron.android.pdfnetsdksamples.OutputListener;
import com.pdftron.android.pdfnetsdksamples.PDFNetSample;
import com.pdftron.android.pdfnetsdksamples.R;
import com.pdftron.android.pdfnetsdksamples.util.Utils;
import com.pdftron.pdf.ContentReplacer;
import com.pdftron.pdf.Image;
import com.pdftron.pdf.PDFDoc;
import com.pdftron.pdf.Page;
import com.pdftron.pdf.Rect;
import com.pdftron.sdf.SDFDoc;

import java.util.ArrayList;

public class ContentReplacerTest extends PDFNetSample {

	private static OutputListener mOutputListener;

	private static ArrayList<String> mFileList = new ArrayList<>();

    public ContentReplacerTest() {
        setTitle(R.string.sample_contentreplacer_title);
        setDescription(R.string.sample_contentreplacer_description);
    }

	@Override
	public void run(OutputListener outputListener) {
		super.run(outputListener);
		mOutputListener = outputListener;
		mFileList.clear();
		printHeader(outputListener);

        // The first step in every application using PDFNet is to initialize the
        // library and set the path to common PDF resources. The library is usually
        // initialized only once, but calling Initialize() multiple times is also fine.

        //--------------------------------------------------------------------------------
        // Example 1) Update a business card template with personalized info

        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + "BusinessCardTemplate.pdf").getAbsolutePath());
            doc.initSecurityHandler();

            ContentReplacer replacer = new ContentReplacer();
            Page page = doc.getPage(1);
            // first, replace the image on the first page
            Image img = Image.create(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath());
            replacer.addImage(page.getMediaBox(), img.getSDFObj());
            // next, replace the text place holders on the second page
            replacer.addString("NAME", "John Smith");
            replacer.addString("QUALIFICATIONS", "Philosophy Doctor");
            replacer.addString("JOB_TITLE", "Software Developer");
            replacer.addString("ADDRESS_LINE1", "#100 123 Software Rd");
            replacer.addString("ADDRESS_LINE2", "Vancouver, BC");
            replacer.addString("PHONE_OFFICE", "604-730-8989");
            replacer.addString("PHONE_MOBILE", "604-765-4321");
            replacer.addString("EMAIL", "info@pdftron.com");
            replacer.addString("WEBSITE_URL", "http://www.pdftron.com");
            // finally, apply
            replacer.process(page);

            doc.save(Utils.createExternalFile("BusinessCard.pdf", mFileList).getAbsolutePath(), SDFDoc.SaveMode.REMOVE_UNUSED, null);
            doc.close();
            mOutputListener.println("Done. Result saved in BusinessCard.pdf");
        } catch (Exception e) {
            mOutputListener.printError(e.getStackTrace());
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 2) Replace text in a region with new text

        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + "newsletter.pdf").getAbsolutePath());
            doc.initSecurityHandler();

            ContentReplacer replacer = new ContentReplacer();
            Page page = doc.getPage(1);
            Rect target_region = page.getMediaBox();
            String replacement_text = "hello hello hello hello hello hello hello hello hello hello";
            replacer.addText(target_region, replacement_text);
            replacer.process(page);

            doc.save(Utils.createExternalFile("ContentReplaced.pdf", mFileList).getAbsolutePath(), SDFDoc.SaveMode.REMOVE_UNUSED, null);
            doc.close();
            mOutputListener.println("Done. Result saved in ContentReplaced.pdf");
        } catch (Exception e) {
            mOutputListener.printError(e.getStackTrace());
            return;
        }

        mOutputListener.println("Done.");

		for (String file : mFileList) {
			addToFileList(file);
		}
		printFooter(outputListener);
	}

}