More languages
Some test text!
More languages
Sample Java code for using PDFTron SDK to search text on PDF pages using regular expressions. The TextSearch utility class builds on functionality available in TextExtractor to simplify most common search operations. Learn more about our Java PDF Library and PDF Indexed Search Library.
Get Started Samples DownloadTo run this sample, get started with a free trial of Apryse SDK.
//---------------------------------------------------------------------------------------
// 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.common.PDFNetException;
import com.pdftron.pdf.Action;
import com.pdftron.pdf.Highlights;
import com.pdftron.pdf.PDFDoc;
import com.pdftron.pdf.Page;
import com.pdftron.pdf.Rect;
import com.pdftron.pdf.TextSearch;
import com.pdftron.pdf.TextSearchResult;
import com.pdftron.sdf.SDFDoc;
import java.util.ArrayList;
public class TextSearchTest extends PDFNetSample {
private static OutputListener mOutputListener;
private static ArrayList<String> mFileList = new ArrayList<>();
public TextSearchTest() {
setTitle(R.string.sample_textsearch_title);
setDescription(R.string.sample_textsearch_description);
}
@Override
public void run(OutputListener outputListener) {
super.run(outputListener);
mOutputListener = outputListener;
mFileList.clear();
printHeader(outputListener);
try {
PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + "credit card numbers.pdf").getAbsolutePath());
doc.initSecurityHandler();
TextSearch txt_search = new TextSearch();
int mode = TextSearch.e_whole_word | TextSearch.e_page_stop;
String pattern = "joHn sMiTh";
//PDFDoc doesn't allow simultaneous access from different threads. If this
//document could be used from other threads (e.g., the rendering thread inside
//PDFView/PDFViewCtrl, if used), it is good practice to lock it.
//Notice: don't forget to call doc.Unlock() to avoid deadlock.
doc.lock();
//call Begin() method to initialize the text search.
txt_search.begin(doc, pattern, mode, -1, -1);
int step = 0;
//call Run() method iteratively to find all matching instances.
while (true) {
TextSearchResult result = txt_search.run();
if (result.getCode() == TextSearchResult.e_found) {
if (step == 0) {
//step 0: found "John Smith"
//note that, here, 'ambient_string' and 'hlts' are not written to,
//as 'e_ambient_string' and 'e_highlight' are not set.
mOutputListener.println(result.getResultStr() + "'s credit card number is: ");
//now switch to using regular expressions to find John's credit card number
mode = txt_search.getMode();
mode |= TextSearch.e_reg_expression | TextSearch.e_highlight;
txt_search.setMode(mode);
String new_pattern = "\\d{4}-\\d{4}-\\d{4}-\\d{4}"; //or "(\\d{4}-){3}\\d{4}"
txt_search.setPattern(new_pattern);
step = step + 1;
} else if (step == 1) {
//step 1: found John's credit card number
mOutputListener.println(" " + result.getResultStr());
//note that, here, 'hlts' is written to, as 'e_highlight' has been set.
//output the highlight info of the credit card number
Highlights hlts = result.getHighlights();
hlts.begin(doc);
while (hlts.hasNext()) {
mOutputListener.println("The current highlight is from page: " + hlts.getCurrentPageNumber());
hlts.next();
}
//see if there is an AMEX card number
String new_pattern = "\\d{4}-\\d{6}-\\d{5}";
txt_search.setPattern(new_pattern);
step = step + 1;
} else if (step == 2) {
//found an AMEX card number
mOutputListener.println("\nThere is an AMEX card number:");
mOutputListener.println(" " + result.getResultStr());
//change mode to find the owner of the credit card; supposedly, the owner's
//name proceeds the number
mode = txt_search.getMode();
mode |= TextSearch.e_search_up;
txt_search.setMode(mode);
String new_pattern = "[A-z]++ [A-z]++";
txt_search.setPattern(new_pattern);
step = step + 1;
} else if (step == 3) {
//found the owner's name of the AMEX card
mOutputListener.println("Is the owner's name:");
mOutputListener.println(" " + result.getResultStr() + "?");
//add a link annotation based on the location of the found instance
Highlights hlts = result.getHighlights();
hlts.begin(doc);
while (hlts.hasNext()) {
Page cur_page = doc.getPage(hlts.getCurrentPageNumber());
double[] q = hlts.getCurrentQuads();
int quad_count = q.length / 8;
for (int i = 0; i < quad_count; ++i) {
//assume each quad is an axis-aligned rectangle
int offset = 8 * i;
double x1 = Math.min(Math.min(Math.min(q[offset + 0], q[offset + 2]), q[offset + 4]), q[offset + 6]);
double x2 = Math.max(Math.max(Math.max(q[offset + 0], q[offset + 2]), q[offset + 4]), q[offset + 6]);
double y1 = Math.min(Math.min(Math.min(q[offset + 1], q[offset + 3]), q[offset + 5]), q[offset + 7]);
double y2 = Math.max(Math.max(Math.max(q[offset + 1], q[offset + 3]), q[offset + 5]), q[offset + 7]);
com.pdftron.pdf.annots.Link hyper_link = com.pdftron.pdf.annots.Link.create(doc, new Rect(x1, y1, x2, y2), Action.createURI(doc, "http://www.pdftron.com"));
cur_page.annotPushBack(hyper_link);
}
hlts.next();
}
doc.save(Utils.createExternalFile("credit card numbers_linked.pdf", mFileList).getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
break;
}
} else if (result.getCode() == TextSearchResult.e_page) {
//you can update your UI here, if needed
} else {
break;
}
}
doc.unlock();
doc.close();
} catch (PDFNetException e) {
mOutputListener.printError(e.getStackTrace());
}
for (String file : mFileList) {
addToFileList(file);
}
printFooter(outputListener);
}
}