nl.mpi.tla.flat.deposit.action.PackageAssembly.java Source code

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Here is the source code for nl.mpi.tla.flat.deposit.action.PackageAssembly.java

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/*
 * Copyright (C) 2015 menzowi
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package nl.mpi.tla.flat.deposit.action;

import java.io.File;
import java.net.URI;
import java.util.UUID;
import nl.mpi.tla.flat.deposit.Context;
import nl.mpi.tla.flat.deposit.DepositException;
import nl.mpi.tla.flat.deposit.Resource;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.http.client.fluent.Request;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author menzowi
 */
public class PackageAssembly extends AbstractAction {

    private static final Logger logger = LoggerFactory.getLogger(PackageAssembly.class.getName());

    @Override
    public boolean perform(Context context) throws DepositException {
        try {
            File dir = new File(getParameter("dir", "./resources"));
            if (!dir.exists())
                FileUtils.forceMkdir(dir);
            int downloads = 0;
            for (Resource res : context.getSIP().getResources()) {
                if (res.hasFile()) {
                    if (res.getFile().canRead()) {
                        logger.info("Previously download[" + res.getFile() + "] of Resource[" + res.getURI()
                                + "] is still available.");
                        continue;
                    } else
                        logger.info("Previously download[" + res.getFile() + "] of Resource[" + res.getURI()
                                + "] isn't available anymore!");
                }
                URI uri = res.getURI();
                if (uri.toString().startsWith(dir.toString())) {
                    // the file is already in the workdir resources directory
                    res.setFile(new File(uri.toString()));
                } else if (uri.toString().startsWith("hdl:" + getParameter("prefix", "foo") + "/") || uri.toString()
                        .startsWith("http://hdl.handle.net/" + getParameter("prefix", "foo") + "/")) {
                    // it has already a local handle
                    // TODO: what to do? resolve to its local location, and check?
                } else {
                    // download the content into a local file 
                    String ext = FilenameUtils.getExtension(uri.getPath());
                    File file = dir.toPath()
                            .resolve("./" + UUID.randomUUID().toString() + (!ext.equals("") ? "." + ext : ""))
                            .toFile();
                    Request.Get(uri).execute().saveContent(file);
                    res.setFile(file);
                    logger.info("Downloaded Resource[" + (++downloads) + "][" + uri + "] to [" + file + "]");
                }
            }
            if (downloads > 0) {
                context.getSIP().save();
            }
        } catch (Exception ex) {
            throw new DepositException("Couldn't assemble the package!", ex);
        }
        return true;
    }

}