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Package containing tasks implemented using sambox.
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/*
* Copyright 2015 by Andrea Vacondio ([email protected]).
*
* This file is part of the Sejda source code
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
*/
package org.sejda.impl.sambox;
import org.sejda.impl.sambox.component.DefaultPdfSourceOpener;
import org.sejda.impl.sambox.component.PDDocumentHandler;
import org.sejda.impl.sambox.component.SamboxOutlineLevelsHandler;
import org.sejda.impl.sambox.component.optimization.OptimizationRuler;
import org.sejda.impl.sambox.component.split.PageDestinationsLevelPdfSplitter;
import org.sejda.model.exception.TaskException;
import org.sejda.model.input.PdfSource;
import org.sejda.model.input.PdfSourceOpener;
import org.sejda.model.outline.OutlinePageDestinations;
import org.sejda.model.parameter.SplitByOutlineLevelParameters;
import org.sejda.model.task.BaseTask;
import org.sejda.model.task.TaskExecutionContext;
import org.sejda.sambox.pdmodel.PDDocument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.sejda.commons.util.IOUtils.closeQuietly;
import static org.sejda.core.notification.dsl.ApplicationEventsNotifier.notifyEvent;
/**
* Task splitting an input pdf document on a set of pages given by an outline level defined in the input parameter.
*
* @author Andrea Vacondio
*
*/
public class SplitByOutlineLevelTask extends BaseTask {
private static final Logger LOG = LoggerFactory.getLogger(SplitByOutlineLevelTask.class);
private int totalSteps;
private PDDocument document = null;
private PdfSourceOpener documentLoader;
private PageDestinationsLevelPdfSplitter splitter;
@Override
public void before(SplitByOutlineLevelParameters parameters, TaskExecutionContext executionContext)
throws TaskException {
super.before(parameters, executionContext);
totalSteps = parameters.getSourceList().size();
documentLoader = new DefaultPdfSourceOpener(executionContext);
}
@Override
public void execute(SplitByOutlineLevelParameters parameters) throws TaskException {
int currentStep = 0;
for (PdfSource> source : parameters.getSourceList()) {
currentStep++;
LOG.debug("Opening {} ", source);
executionContext().notifiableTaskMetadata().setCurrentSource(source);
document = source.open(documentLoader).getUnderlyingPDDocument();
LOG.debug("Retrieving outline information for level {}", parameters.getLevelToSplitAt());
OutlinePageDestinations pagesDestination = new SamboxOutlineLevelsHandler(document,
parameters.getMatchingTitleRegEx()).getPageDestinationsForLevel(parameters.getLevelToSplitAt());
splitter = new PageDestinationsLevelPdfSplitter(document, parameters, pagesDestination,
new OptimizationRuler(parameters.getOptimizationPolicy()).apply(document));
LOG.debug("Starting split by outline level for {} ", parameters);
splitter.split(executionContext(), parameters.getOutputPrefix(), source);
closeQuietly(document);
notifyEvent(executionContext().notifiableTaskMetadata()).stepsCompleted(currentStep).outOf(totalSteps);
}
executionContext().notifiableTaskMetadata().clearCurrentSource();
LOG.debug("Input documents splitted and written to {}", parameters.getOutput());
}
@Override
public void after() {
closeQuietly(document);
splitter = null;
}
}