001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Thomas Roger <troger@nuxeo.com>
016 */
017
018package org.nuxeo.ecm.platform.content.template.service;
019
020import java.util.ArrayList;
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.runtime.model.ContributionFragmentRegistry;
029
030/**
031 * Registry of {@link PostContentCreationHandler}s.
032 *
033 * @author <a href="mailto:troger@nuxeo.com">Thomas Roger</a>
034 * @since 5.5
035 */
036public class PostContentCreationHandlerRegistry extends
037        ContributionFragmentRegistry<PostContentCreationHandlerDescriptor> {
038
039    private static final Log log = LogFactory.getLog(PostContentCreationHandlerRegistry.class);
040
041    protected Map<String, PostContentCreationHandlerDescriptor> postContentCreationHandlerDescriptors = new HashMap<String, PostContentCreationHandlerDescriptor>();
042
043    @Override
044    public String getContributionId(PostContentCreationHandlerDescriptor contrib) {
045        return contrib.getName();
046    }
047
048    @Override
049    public void contributionUpdated(String id, PostContentCreationHandlerDescriptor contrib,
050            PostContentCreationHandlerDescriptor newOrigContrib) {
051        if (contrib.isEnabled()) {
052            postContentCreationHandlerDescriptors.put(id, contrib);
053        } else {
054            postContentCreationHandlerDescriptors.remove(id);
055        }
056    }
057
058    @Override
059    public void contributionRemoved(String id, PostContentCreationHandlerDescriptor contrib) {
060        postContentCreationHandlerDescriptors.remove(id);
061    }
062
063    @Override
064    public PostContentCreationHandlerDescriptor clone(PostContentCreationHandlerDescriptor postContentCreationHandler) {
065        try {
066            return (PostContentCreationHandlerDescriptor) postContentCreationHandler.clone();
067        } catch (CloneNotSupportedException e) {
068            // this should never occur since clone implements Cloneable
069            throw new RuntimeException(e);
070        }
071    }
072
073    @Override
074    public void merge(PostContentCreationHandlerDescriptor src, PostContentCreationHandlerDescriptor dst) {
075        if (src.getClazz() != null) {
076            dst.setClazz(src.getClazz());
077        }
078        if (src.isEnabled() != dst.isEnabled()) {
079            dst.setEnabled(src.isEnabled());
080        }
081        int order = src.getOrder();
082        if (order > 0 && order != dst.getOrder()) {
083            dst.setOrder(src.getOrder());
084        }
085    }
086
087    public List<PostContentCreationHandler> getOrderedHandlers() {
088        List<PostContentCreationHandlerDescriptor> descs = new ArrayList<PostContentCreationHandlerDescriptor>(
089                postContentCreationHandlerDescriptors.values());
090        Collections.sort(descs);
091
092        List<PostContentCreationHandler> handlers = new ArrayList<PostContentCreationHandler>();
093        for (PostContentCreationHandlerDescriptor desc : descs) {
094            try {
095                handlers.add(desc.getClazz().newInstance());
096            } catch (ReflectiveOperationException e) {
097                log.error("Unable to instantiate class for handler: " + desc.getName(), e);
098            }
099        }
100        return handlers;
101    }
102
103}