co.turnus.versioning.impl.SimpleFileVersioner.java Source code

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Here is the source code for co.turnus.versioning.impl.SimpleFileVersioner.java

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/* 
 * TURNUS, the co-exploration framework
 * 
 * Copyright (C) 2014 EPFL SCI STI MM
 *
 * This file is part of TURNUS.
 *
 * TURNUS 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.
 *
 * TURNUS 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 TURNUS.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Additional permission under GNU GPL version 3 section 7
 * 
 * If you modify this Program, or any covered work, by linking or combining it
 * with Eclipse (or a modified version of Eclipse or an Eclipse plugin or 
 * an Eclipse library), containing parts covered by the terms of the 
 * Eclipse Public License (EPL), the licensors of this Program grant you 
 * additional permission to convey the resulting work.  Corresponding Source 
 * for a non-source form of such a combination shall include the source code 
 * for the parts of Eclipse libraries used as well as that of the  covered work.
 * 
 */
package co.turnus.versioning.impl;

import java.io.File;
import java.util.Date;
import java.util.UUID;

import co.turnus.versioning.Version;
import co.turnus.versioning.Versioner;
import co.turnus.versioning.VersioningFactory;

import com.google.common.hash.Hashing;
import com.google.common.io.Files;

public class SimpleFileVersioner implements Versioner {

    public static final String NAME = "Simple File Versioner";

    @Override
    public String getName() {
        return NAME;
    }

    @Override
    public Version getVersion(File file) {
        Date date = new Date();
        Version v = VersioningFactory.eINSTANCE.createVersion();
        v.setVersioningDate(date);

        if (file != null && file.exists()) {
            v.setLastModificationDate(new Date(file.lastModified()));
            try {
                v.setId(Files.hash(file, Hashing.md5()).toString());
            } catch (Exception e) {
                v.setId(UUID.randomUUID().toString());
            }
        } else {
            v.setLastModificationDate(date);
            v.setId(UUID.randomUUID().toString());
        }

        v.setAttribute("versioner", NAME);

        return v;
    }

}