StandardArtifactFSFactory.java

/*******************************************************************************
 * Copyright (c) 2008, 2010 VMware Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   VMware Inc. - initial contribution
 *******************************************************************************/

package org.eclipse.virgo.kernel.artifact.fs;

import java.io.File;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;

import org.eclipse.virgo.kernel.artifact.fs.internal.DirectoryArtifactFS;
import org.eclipse.virgo.kernel.artifact.fs.internal.FileArtifactFS;
import org.eclipse.virgo.kernel.artifact.fs.internal.JarFileArtifactFS;


public final class StandardArtifactFSFactory implements ArtifactFSFactory {
    
    private static final List<String> JAR_EXTENSIONS = Arrays.asList("jar", "war");

    /**
     * {@inheritDoc}
     */
    public ArtifactFS create(File file) {
        if (file.isDirectory()) {
            return new DirectoryArtifactFS(file);
        }
        return looksLikeAJar(file.getName()) ? new JarFileArtifactFS(file) : new FileArtifactFS(file);
    }
    
    private boolean looksLikeAJar(String name) {
        String fileName = name.toLowerCase(Locale.ENGLISH);

        int dotLocation = fileName.lastIndexOf('.');
        if (dotLocation == -1) {
            return false;
        }
        return JAR_EXTENSIONS.contains(fileName.substring(dotLocation + 1));
    }


}