/**
 * Copyright 2005-2013 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.rice.kew.engine.node.var.schemes;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.apache.log4j.Logger;
import org.kuali.rice.kew.engine.RouteContext;
import org.kuali.rice.kew.engine.node.PropertiesUtil;
import org.kuali.rice.kew.engine.node.var.Property;
import org.kuali.rice.kew.engine.node.var.PropertyScheme;


/**
 * A property scheme that interprets the locator as a URL.
 * 
 * @author Kuali Rice Team (rice.collab@kuali.org)
 */
public class URLScheme implements PropertyScheme {
    private static final Logger LOG = Logger.getLogger(URLScheme.class);

    public String getName() {
        return "url";
    }
    public String getShortName() {
        return "url";
    }

    public Object load(Property property, RouteContext context) {
        LOG.info("Reading url '" + property.locator + "'...");
        InputStream is;
        try {
            is = new URL(property.locator).openStream();
            if (is == null) {
                throw new RuntimeException("Unable to access URL: " + property.locator);
            }
            return PropertiesUtil.readResource(is);
        } catch (IOException ioe) {
            throw new RuntimeException("Error loading resource: " + property.locator, ioe);
        }
    }

    public String toString() {
        return "[URLScheme]";
    }
}
