org.ow2.util.archive.impl.DefaultArchiveFactory Maven / Gradle / Ivy

Go to download
/**
 * Copyright 2007-2012 Bull S.A.S.
 *
 * Licensed 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.ow2.util.archive.impl;

import java.io.File;
import java.io.IOException;
import java.util.jar.JarFile;

import org.ow2.util.archive.api.IArchive;
import org.ow2.util.archive.api.IArchiveFactory;
import org.ow2.util.log.Log;
import org.ow2.util.log.LogFactory;

/**
 * Default factory that manages the file (jar file or directories).
 * @author Florent Benoit
 */
public class DefaultArchiveFactory implements IArchiveFactory {

    /**
     * Logger.
     */
    private Log logger = LogFactory.getLog(DefaultArchiveFactory.class);

    /**
     * Creates an EZBArchive object for the given object.
     * @param file the file that this factory can manage.
     * @return a new EZBArchive instance or null if it's not an archive
     */
    public IArchive create(final File file) {
        if (file.isDirectory()) {
            return new DirectoryArchiveImpl(file);
        }

        // check that this is a valid JAR file, else return null
        JarFile jarFile = null;
        try {
            jarFile = new JarFile(file);
        } catch (IOException e) {
            // not a valid jar file
            logger.debug("File ''{0}'' is not a valid Jar File", file);

        } finally {
            if (jarFile != null) {
                try {
                    jarFile.close();
                } catch (IOException e) {
                    logger.debug("Cannot close the jar file ''{0}''", jarFile);
                }
            }
        }
        if (jarFile != null) {
            return new JarArchiveImpl(file);
        } else {
            return new FileArchiveImpl(file);
        }
    }

    /**
     * @return the type supported by the factory
     */
    public Class getSupportedClass() {
        return File.class;
    }

}