org.apache.openmeetings.core.converter.DocumentConverter.java Source code

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Here is the source code for org.apache.openmeetings.core.converter.DocumentConverter.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
package org.apache.openmeetings.core.converter;

import static org.apache.commons.io.FileUtils.copyFile;
import static org.apache.openmeetings.util.OmFileHelper.EXTENSION_PDF;
import static org.apache.openmeetings.util.OpenmeetingsVariables.CONFIG_PATH_OFFICE;

import java.io.File;
import java.util.function.Consumer;

import org.apache.openmeetings.db.dao.basic.ConfigurationDao;
import org.apache.openmeetings.db.entity.file.FileItem;
import org.apache.openmeetings.util.StoredFile;
import org.apache.openmeetings.util.process.ProcessResult;
import org.apache.openmeetings.util.process.ProcessResultList;
import org.apache.wicket.util.string.Strings;
import org.artofsolving.jodconverter.OfficeDocumentConverter;
import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class DocumentConverter {
    private static final Logger log = LoggerFactory.getLogger(DocumentConverter.class);
    private static final String JOD_JOD_NAME = "doJodConvert";

    @Autowired
    protected ConfigurationDao cfgDao;
    @Autowired
    private ImageConverter imageConverter;

    public ProcessResultList convertPDF(FileItem f, StoredFile sf) throws Exception {
        return convertPDF(f, sf, new ProcessResultList());
    }

    public ProcessResultList convertPDF(FileItem f, StoredFile sf, ProcessResultList logs) throws Exception {
        boolean fullProcessing = !sf.isPdf();
        File original = f.getFile(sf.getExt());
        File pdf = f.getFile(EXTENSION_PDF);
        log.debug("fullProcessing: " + fullProcessing);
        if (fullProcessing) {
            log.debug("-- running JOD --");
            logs.add(doJodConvert(original, pdf));
        } else if (!EXTENSION_PDF.equals(sf.getExt())) {
            copyFile(original, pdf);
        }

        log.debug("-- generate page images --");
        return imageConverter.convertDocument(f, pdf, logs);
    }

    public static void createOfficeManager(String officePath, Consumer<OfficeManager> consumer) {
        OfficeManager manager = null;
        try {
            DefaultOfficeManagerConfiguration configuration = new DefaultOfficeManagerConfiguration();
            if (!Strings.isEmpty(officePath)) {
                configuration.setOfficeHome(officePath);
            }
            manager = configuration.buildOfficeManager();
            manager.start();
            if (consumer != null) {
                consumer.accept(manager);
            }
        } finally {
            if (manager != null) {
                manager.stop();
            }
        }
    }

    /**
     * Generates PDF using JOD Library (external library)
     *
     * @param in - file to convert
     * @param out - file to write result
     * @return - result of the conversion as {@link ProcessResult}
     */
    public ProcessResult doJodConvert(File in, File out) {
        try {
            createOfficeManager(cfgDao.getString(CONFIG_PATH_OFFICE, null), man -> {
                OfficeDocumentConverter converter = new OfficeDocumentConverter(man);
                converter.convert(in, out);
            });
        } catch (Exception ex) {
            log.error(JOD_JOD_NAME, ex);
            return new ProcessResult(JOD_JOD_NAME, ex.getMessage(), ex);
        }
        return new ProcessResult(JOD_JOD_NAME, "Document converted successfully", null).setExitCode(0);
    }
}