001/*
002 *  Copyright 2020 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.core.resources;
017
018import java.util.Comparator;
019import java.util.Objects;
020
021import org.apache.cocoon.components.LifecycleHelper;
022import org.apache.cocoon.util.log.SLF4JLoggerAdapter;
023
024import org.ametys.core.util.LambdaUtils;
025import org.ametys.runtime.plugin.component.AbstractThreadSafeComponentExtensionPoint;
026import org.ametys.runtime.plugin.component.LogEnabled;
027
028/**
029 * Extension point for {@link ResourceHandlerProvider}.
030 */
031public class ResourceHandlerProviderExtensionPoint extends AbstractThreadSafeComponentExtensionPoint<ResourceHandlerProvider>
032{
033    /** Avalon Role */
034    public static final String ROLE = ResourceHandlerProviderExtensionPoint.class.getName();
035    
036    /**
037     * Get the extension of max priority matching the provided source, based on the registered suffixes
038     * @param source The source
039     * @return The corresponding extension
040     * @throws Exception if an error occurs during ResourceHandler creation.
041     */
042    public ResourceHandler getResourceHandler(String source) throws Exception
043    {
044        return getExtensionsIds().stream()
045                                 .map(this::getExtension)
046                                 .sorted(Comparator.comparing(ResourceHandlerProvider::getPriority).reversed())
047                                 .map(LambdaUtils.wrap(provider -> provider.getResourceHandler(source)))
048                                 .filter(Objects::nonNull)
049                                 .findFirst()
050                                 .orElse(_getDefaultResourceHandler());
051    }
052    
053    private ResourceHandler _getDefaultResourceHandler() throws Exception
054    {
055        ResourceHandler handler = new DefaultResourceHandler();
056        LifecycleHelper.setupComponent(handler, new SLF4JLoggerAdapter(getLogger()), _context, _cocoonManager, null);
057        if (handler instanceof LogEnabled)
058        {
059            ((LogEnabled) handler).setLogger(getLogger());
060        }
061        
062        return handler;
063    }
064}