
/*
 * Janino - An embedded Java[TM] compiler
 *
 * Copyright (c) 2001-2010, Arno Unkrig
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *       following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *       following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. The name of the author may not be used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.codehaus.janino.util.resource;

import java.util.*;

/**
 * A {@link org.codehaus.janino.util.resource.ResourceFinder} that finds its resources through a collection of
 * other {@link org.codehaus.janino.util.resource.ResourceFinder}s.
 */
@SuppressWarnings("rawtypes") public
class MultiResourceFinder extends ResourceFinder {
    private final Collection resourceFinders; // One for each entry

    /**
     * @param resourceFinders The entries of the "path"
     */
    public
    MultiResourceFinder(Collection resourceFinders) { this.resourceFinders = resourceFinders; }

    // Implement ResourceFinder.

    @Override public final Resource
    findResource(String resourceName) {
        for (Iterator it = this.resourceFinders.iterator(); it.hasNext();) {
            ResourceFinder rf       = (ResourceFinder) it.next();
            Resource       resource = rf.findResource(resourceName);
//System.err.println("*** " + resourceName + " in " + rf + "? => " + url);
            if (resource != null) return resource;
        }
        return null;
    }
}
