org.silverpeas.core.viewer.util.JsonPdfUtil.java Source code

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Here is the source code for org.silverpeas.core.viewer.util.JsonPdfUtil.java

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/*
 * Copyright (C) 2000 - 2018 Silverpeas
 *
 * 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.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception.  You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "https://www.silverpeas.org/legal/floss_exception.html"
 *
 * 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 <http://www.gnu.org/licenses/>.
 */
package org.silverpeas.core.viewer.util;

import org.apache.commons.exec.CommandLine;
import org.silverpeas.core.util.exec.ExternalExecution;
import org.silverpeas.core.util.exec.ExternalExecutionException;
import org.silverpeas.core.viewer.service.JsonPdfToolManager;
import org.silverpeas.core.viewer.service.ViewerException;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

/**
 * Some centralization about the use of pdf2json tool.
 * @author Yohann Chastagnier
 */
public class JsonPdfUtil extends ExternalExecution {

    public static final String JSON_DOCUMENT_EXTENSION = "js";

    private static final String PDF_TO_JSON_COMMON_PARAMS = "-enc UTF-8 -compress -split 10";

    /**
     * Indicates if tool that permits to convert PDF into JSon data is activated.
     * @return
     */
    public static boolean isActivated() {
        return JsonPdfToolManager.isActivated();
    }

    /**
     * Converts a PDF file into a SWF file.
     * @param pdfFile the pdf file
     * @param destination the destination file without include some path parts in relation to the
     * mechanism of conversion.
     */
    public static void convert(final File pdfFile, final File destination) {
        File out = new File(destination.getParentFile(), destination.getName() + "_%." + JSON_DOCUMENT_EXTENSION);
        try {
            if (exec(buildJsonPdfCommandLine(pdfFile, out)).isEmpty()) {
                throw new ViewerException("pdf2json conversion failed...");
            }
        } catch (ExternalExecutionException e) {
            throw new ViewerException(e);
        }
    }

    static CommandLine buildJsonPdfCommandLine(File inputFile, File outputFile) {
        Map<String, File> files = new HashMap<String, File>(2);
        files.put("inputFile", inputFile);
        files.put("outputFile", outputFile);
        CommandLine commandLine = new CommandLine("pdf2json");
        commandLine.addArgument("${inputFile}", false);
        commandLine.addArguments(PDF_TO_JSON_COMMON_PARAMS, false);
        commandLine.addArgument("${outputFile}", false);
        commandLine.setSubstitutionMap(files);
        return commandLine;
    }
}