/*
 * Copyright (c) 2018 - 2023, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
 *
 * Entgra (Pvt) Ltd. 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 io.entgra.device.mgt.core.device.mgt.core.config.permission;

import org.scannotation.archiveiterator.DirectoryIteratorFactory;
import org.scannotation.archiveiterator.Filter;
import org.scannotation.archiveiterator.JarIterator;
import org.scannotation.archiveiterator.StreamIterator;

import java.io.IOException;
import java.net.URL;
import java.util.concurrent.ConcurrentHashMap;

class ExtendedIteratorFactory {

    private static final ConcurrentHashMap<String, DirectoryIteratorFactory> registry = new ConcurrentHashMap();

    static StreamIterator create(URL url, Filter filter) throws IOException {
        String urlString = url.toString();
        if(urlString.endsWith("!/")) {
            urlString = urlString.substring(4);
            urlString = urlString.substring(0, urlString.length() - 2);
            url = new URL(urlString);
        }

        if(!urlString.endsWith("/")) {
            return new JarIterator(url.openStream(), filter);
        } else {
            DirectoryIteratorFactory factory = registry.get(url.getProtocol());
            if(factory == null) {
                throw new IOException("Unable to scan directory of protocol: " + url.getProtocol());
            } else {
                return factory.create(url, filter);
            }
        }
    }

    static {
        registry.put("file", new ExtendedFileProtocolIteratorFactory());
    }
}
