VFSPackageScanClassResolver

VFSPackageScanClassResolver

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *  *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */

package org.switchyard.component.camel.deploy;

import org.apache.camel.impl.DefaultPackageScanClassResolver;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

/**
 * JBoss VFS package scan Class resolver.
 *
 * @author <a href="mailto:[email protected]">[email protected]</a>
 */
public class VFSPackageScanClassResolver extends DefaultPackageScanClassResolver {

    private static final String VFS = "vfs";
    private static final String[] ARCHIVE_TYPES = new String[] {".jar", ".zip", ".sar", ".ear", ".war"};

    @Override
    protected URL customResourceLocator(URL url) throws IOException {
        try {
            URI uri = url.toURI();
            if (VFS.equals(uri.getScheme())) {
                return translate(uri).toURL();
            } else {
                return super.customResourceLocator(url);
            }
        } catch (Exception e) {
            return super.customResourceLocator(url);
        }
    }

    /**
     * Translate a VFS URI into a file based URI that can be understood by
     * DefaultPackageScanClassResolver (super class).
     * @param uri The URI to be translated.
     * @return The translated URI.
     * @throws URISyntaxException URI Syntax exception.
     * @throws MalformedURLException badly formed URL exception.
     */
    protected static URI translate(URI uri) throws URISyntaxException, MalformedURLException {
        if (VFS.equals(uri.getScheme())) {
            String path = uri.getPath();

            for (String archiveType : ARCHIVE_TYPES) {
                int indexOfResource = path.indexOf(archiveType + "/");
                if (indexOfResource != -1) {
                    path = path.substring(0, indexOfResource + archiveType.length());
                    break;
                }
            }

            return new URI("file:" + path);
        } else {
            throw new RuntimeException("Invalid URL scheme on URL '" + uri + "'.  Must be a 'vfs' scheme.");
        }
    }
}