001/*
002 * (C) Copyright 2018 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 *
017 * Contributors:
018 *     bdelbosc
019 */
020package org.nuxeo.runtime.codec;
021
022import java.util.HashMap;
023import java.util.Map;
024
025import org.apache.commons.logging.Log;
026import org.apache.commons.logging.LogFactory;
027import org.nuxeo.lib.stream.codec.Codec;
028import org.nuxeo.runtime.model.ComponentContext;
029import org.nuxeo.runtime.model.ComponentInstance;
030import org.nuxeo.runtime.model.DefaultComponent;
031
032public class CodecServiceImpl extends DefaultComponent implements CodecService {
033    private static final Log log = LogFactory.getLog(CodecServiceImpl.class);
034
035    public static final String CODEC_XP = "codec";
036
037    public static final int APPLICATION_STARTED_ORDER = -600;
038
039    protected final Map<String, CodecDescriptor> configs = new HashMap<>();
040
041    protected final Map<String, CodecFactory> codecFactories = new HashMap<>();
042
043    @Override
044    public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) {
045        if (extensionPoint.equals(CODEC_XP)) {
046            CodecDescriptor descriptor = (CodecDescriptor) contribution;
047            configs.put(descriptor.getName(), descriptor);
048            log.debug(String.format("Register Codec contribution: %s", descriptor));
049            codecFactories.put(descriptor.getName(), descriptor.getInstance());
050        }
051    }
052
053    @Override
054    public int getApplicationStartedOrder() {
055        return APPLICATION_STARTED_ORDER;
056    }
057
058    @Override
059    public void deactivate(ComponentContext context) {
060        super.deactivate(context);
061        log.debug("Deactivating service");
062    }
063
064    @Override
065    public void activate(ComponentContext context) {
066        super.activate(context);
067        log.debug("Activating service");
068    }
069
070    @Override
071    public <T> Codec<T> getCodec(String codecName, Class<T> objectClass) {
072        if (!codecFactories.containsKey(codecName)) {
073            return null;
074        }
075        // TODO codec are thread safe so we can use a cache codecName, objectClass -> codec
076        return codecFactories.get(codecName).newCodec(objectClass);
077    }
078}