/*****************************************************************
 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.cayenne.resource;

import java.net.MalformedURLException;
import java.net.URL;

import org.apache.cayenne.CayenneRuntimeException;

/**
 * A {@link Resource} implementation wrapping a resource URL.
 * 
 * @since 3.1
 */
public class URLResource implements Resource {

    private URL url;

    public URLResource(URL url) {
        this.url = url;
    }

    public Resource getRelativeResource(String relativePath) {
        try {
            return new URLResource(new URL(url, relativePath));
        }
        catch (MalformedURLException e) {
            throw new CayenneRuntimeException(
                    "Error creating relative resource '%s' : '%s'",
                    e,
                    url,
                    relativePath);
        }
    }

    public URL getURL() {
        return url;
    }
    
    @Override
    public String toString() {
        String urlString = String.valueOf(url);
        return "<URLResource: " + urlString + ">";
    }

}