source: osm/applications/editors/josm/plugins/pdfimport/src/pdfimport/pdfbox/PdfBoxParser.java@ 23863

package pdfimport.pdfbox;
import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.Dimension;
import java.awt.geom.Rectangle2D;
import java.io.File;
import java.util.List;

import org.apache.pdfbox.pdfviewer.PageDrawer;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.util.PDFStreamEngine;

import pdfimport.PathOptimizer;

public class PdfBoxParser extends PDFStreamEngine{
        private final PathOptimizer target;

        public PdfBoxParser(PathOptimizer target){
                this.target = target;
        }

        @SuppressWarnings("unchecked")
        public void parse(File file) throws Exception
        {
                PDDocument document = PDDocument.load( file);

                if( document.isEncrypted() ){
                        throw new Exception(tr("Encrypted documents not supported."));
                }

                List allPages = document.getDocumentCatalog().getAllPages();

                if (allPages.size() != 1) {
                        throw new Exception(tr("The PDF file must have exactly one page."));
                }

                PDPage page = (PDPage)allPages.get(0);
                PDRectangle pageSize = page.findMediaBox();
                Dimension pageDimension = pageSize.createDimension();
                int rotation = page.getRotation();

                GraphicsProcessor p = new GraphicsProcessor(target, rotation, pageDimension.getHeight());
                PageDrawer drawer = new PageDrawer();
                drawer.drawPage(p, page, pageDimension);
                this.target.bounds = new Rectangle2D.Double(pageSize.getLowerLeftX(), pageSize.getLowerLeftY(), pageSize.getWidth(), pageSize.getHeight());
        }
}