001/**
002 * Copyright 2005-2014 The Kuali Foundation
003 *
004 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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.kuali.rice.krad.data.metadata.impl;
017
018import java.util.HashMap;
019import java.util.Map;
020
021import org.kuali.rice.krad.data.metadata.DataObjectMetadata;
022import org.kuali.rice.krad.data.metadata.MetadataRepository;
023import org.kuali.rice.krad.data.provider.MetadataProvider;
024import org.kuali.rice.krad.data.provider.ProviderRegistry;
025import org.springframework.beans.factory.annotation.Required;
026
027/**
028 * MetadataRepository implementation backed by the ProviderRegistry
029 *
030 * @author Kuali Rice Team (rice.collab@kuali.org)
031 */
032public class MetadataRepositoryImpl implements MetadataRepository {
033
034    private ProviderRegistry registry;
035
036    @Required
037    public void setProviderRegistry(ProviderRegistry registry) {
038        this.registry = registry;
039    }
040
041    @Override
042        public synchronized DataObjectMetadata getMetadata(Class<?> type) {
043        // don't compose, just return first provider result
044        for (MetadataProvider provider: registry.getMetadataProviders()) {
045            if (provider.handles(type)) {
046                return provider.getMetadataForType(type);
047            }
048        }
049        return null;
050    }
051
052    @Override
053        public Map<Class<?>, DataObjectMetadata> getAllMetadata() {
054                Map<Class<?>, DataObjectMetadata> allMetaData = new HashMap<Class<?>, DataObjectMetadata>();
055        // accumulate all metadata
056        // subsequent mappings for given data object type override previous mappings
057        // so provider order matters - last one wins
058        for (MetadataProvider provider: registry.getMetadataProviders()) {
059            allMetaData.putAll(provider.provideMetadata());
060        }
061        return allMetaData;
062    }
063
064    @Override
065    public boolean contains(Class<?> type) {
066        return getMetadata(type) != null;
067    }
068
069}