JPEG2JP2000Converter.java

package eu.europeana.cloud.migrator.processing;

import eu.europeana.cloud.migrator.ResourceMigrator;
import org.apache.log4j.Logger;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

public class JPEG2JP2000Converter
        extends CommandExecutor
        implements FileProcessor {

    private static final Logger logger = Logger.getLogger(JPEG2JP2000Converter.class);

    private static final int JPEG_TO_TIFF_COMMAND_ID = 0;

    private static final int TIFF_TO_JP2000_COMMAND_ID = 1;

    private static final String TIFF_EXTENSION = ".tiff";

    private static final String JP2000_EXTENSION = ".jp2";

    public JPEG2JP2000Converter(String configFile) {
        super(configFile);
    }

    @Override
    public File process(URI fileURI) {
        File outFolder = new File(workingDirectory);
        File tiff = null;
        File jp2 = null;

        try {
            // run jpeg to tiff conversion
            tiff = File.createTempFile("convert", TIFF_EXTENSION, outFolder);
            List<String> parameters = new ArrayList<String>();
            parameters.add(Paths.get(fileURI).toAbsolutePath().toString().replace(ResourceMigrator.WINDOWS_SEPARATOR, ResourceMigrator.LINUX_SEPARATOR));
            parameters.add(tiff.getAbsolutePath());

            if (!runCommand(JPEG_TO_TIFF_COMMAND_ID, parameters).getResult()) {
                logger.error("Error while converting jpeg to tiff.");
                return null;
            }

            // run tiff to jp2 conversion
            jp2 = File.createTempFile("convert", JP2000_EXTENSION, outFolder);
            parameters.clear();
            parameters.add(tiff.getAbsolutePath());
            parameters.add(jp2.getAbsolutePath());

            if (!runCommand(TIFF_TO_JP2000_COMMAND_ID, parameters).getResult()) {
                logger.error("Error while converting tiff to jp2000.");
                if (jp2 != null)
                    jp2.delete();
                return null;
            }
        }
        catch (IOException e) {
            logger.error("Problem while converting from JPEG to JP2000.", e);
        }
        finally {
            if (tiff != null)
                tiff.delete();
        }
        return jp2;
    }

}