001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and others.
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 *
016 * Contributors:
017 *     Anahide Tchertchian
018 */
019package org.nuxeo.ecm.web.resources.wro.provider;
020
021import java.util.Collections;
022import java.util.HashMap;
023import java.util.List;
024import java.util.Map;
025
026import org.apache.commons.logging.Log;
027import org.apache.commons.logging.LogFactory;
028import org.nuxeo.ecm.web.resources.api.Processor;
029import org.nuxeo.ecm.web.resources.api.service.WebResourceManager;
030import org.nuxeo.runtime.api.Framework;
031
032import ro.isdc.wro.model.resource.locator.UriLocator;
033import ro.isdc.wro.model.resource.processor.ResourcePostProcessor;
034import ro.isdc.wro.model.resource.processor.ResourcePreProcessor;
035import ro.isdc.wro.util.provider.ConfigurableProviderSupport;
036
037/**
038 * Nuxeo contributor to wro processors and locators, registered as a service.
039 *
040 * @since 7.3
041 */
042public class NuxeoConfigurableProvider extends ConfigurableProviderSupport {
043
044    private static final Log log = LogFactory.getLog(NuxeoConfigurableProvider.class);
045
046    public static final String PRE_TYPE = "wroPre";
047
048    public static final String POST_TYPE = "wroPost";
049
050    @Override
051    public Map<String, UriLocator> provideLocators() {
052        Map<String, UriLocator> map = new HashMap<String, UriLocator>();
053        map.put(NuxeoUriLocator.ALIAS, new NuxeoUriLocator());
054        return map;
055    }
056
057    public Map<String, ResourcePreProcessor> providePreProcessors() {
058        Map<String, ResourcePreProcessor> map = new HashMap<String, ResourcePreProcessor>();
059        // extend with runtime service processors registration
060        List<? extends Processor> processors = resolveProcessors(PRE_TYPE);
061        for (Processor p : processors) {
062            Class<?> klass = p.getTargetProcessorClass();
063            if (klass == null) {
064                // assume alias references a native wro processor
065                continue;
066            }
067            ResourcePreProcessor proc;
068            try {
069                proc = (ResourcePreProcessor) klass.newInstance();
070                map.put(p.getName(), proc);
071            } catch (ReflectiveOperationException e) {
072                log.error("Caught error when instanciating resource pre processor", e);
073                continue;
074            }
075        }
076        return map;
077    }
078
079    @Override
080    public Map<String, ResourcePostProcessor> providePostProcessors() {
081        Map<String, ResourcePostProcessor> map = new HashMap<String, ResourcePostProcessor>();
082        // extend with runtime service processors registration
083        List<Processor> processors = resolveProcessors(POST_TYPE);
084        for (Processor p : processors) {
085            Class<?> klass = p.getTargetProcessorClass();
086            if (klass == null) {
087                // assume alias references a native wro processor
088                continue;
089            }
090            ResourcePostProcessor proc;
091            try {
092                proc = (ResourcePostProcessor) klass.newInstance();
093                map.put(p.getName(), proc);
094            } catch (ReflectiveOperationException e) {
095                log.error("Caught error when instanciating resource post processor", e);
096                continue;
097            }
098        }
099        return map;
100    }
101
102    public static List<Processor> resolveProcessors(String type) {
103        WebResourceManager service = Framework.getService(WebResourceManager.class);
104        List<Processor> processors = service.getProcessors(type);
105        if (processors != null) {
106            return processors;
107        }
108        return Collections.emptyList();
109    }
110
111}