SearchControllerHeadless.java

package org.icepdf.os.examples.search;
/*
 * Copyright 2006-2017 ICEsoft Technologies Canada Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS
 * IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

import org.icepdf.core.exceptions.PDFException;
import org.icepdf.core.exceptions.PDFSecurityException;
import org.icepdf.core.pobjects.Document;
import org.icepdf.core.pobjects.PDimension;
import org.icepdf.core.pobjects.Page;
import org.icepdf.core.search.DocumentSearchController;
import org.icepdf.core.util.GraphicsRenderingHints;
import org.icepdf.ri.common.search.DocumentSearchControllerImpl;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

/**
 * The <code>SearchControllerHeadless</code> class is an example of how to
 * search a document and save page capture with search highlighting to disk.
 * A file specified at the command line is opened and every page in the document
 * is captured as an image and saved to disk as a PNG graphic file.
 *
 * @since 4.2
 */
public class SearchControllerHeadless {
    public static void main(String[] args) {

        // Get a file from the command line to open
        String filePath = args[0];

        // save page captures to file.
        float scale = 1.0f;
        float rotation = 0f;

        // open the document
        Document document = new Document();
        try {
            document.setFile(filePath);

            // get the search controller
            DocumentSearchController searchController =
                    new DocumentSearchControllerImpl(document);
            // add a specified search terms.
            searchController.addSearchTerm("PDF", true, false);
            searchController.addSearchTerm("Part", true, false);
            searchController.addSearchTerm("Contents", true, false);

            // Paint each pages content to an image and write the image to file
            for (int i = 0; i < 5; i++) {

                Page page = document.getPageTree().getPage(i);
                // initialize the page so we are using the same  WordText object
                // thar are used to paint the page.
                page.init();

                // search the page
                searchController.searchPage(i);

                // build the image for capture.
                PDimension sz = page.getSize(Page.BOUNDARY_CROPBOX, rotation, scale);
                int pageWidth = (int) sz.getWidth();
                int pageHeight = (int) sz.getHeight();
                BufferedImage image = new BufferedImage(pageWidth,
                        pageHeight,
                        BufferedImage.TYPE_INT_RGB);
                Graphics g = image.createGraphics();
                Graphics2D g2d = (Graphics2D) g;

                // capture current transform for graphics context.
                page.paint(g, GraphicsRenderingHints.SCREEN,
                        Page.BOUNDARY_CROPBOX, rotation, scale, true, true);
                g2d.dispose();

                // capture the page image to file
                File file = new File("imageCapture1_" + i + ".png");
                ImageIO.write(image, "png", file);
                image.flush();
            }
            // clean up resources
            document.dispose();

        } catch (PDFException e) {
            e.printStackTrace();
        } catch (PDFSecurityException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}