001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.metamodel.progmodel;
021
022import java.util.Collections;
023import java.util.List;
024
025import com.google.common.collect.Lists;
026
027import org.apache.isis.core.commons.config.IsisConfiguration;
028import org.apache.isis.core.commons.factory.InstanceUtil;
029import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
030import org.apache.isis.core.metamodel.facets.FacetFactory;
031import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
032
033public abstract class ProgrammingModelAbstract implements ProgrammingModel {
034
035    private final List<FacetFactory> facetFactories = Lists.newArrayList();
036    private final List<Object> facetFactoryInstancesOrClasses = Lists.newArrayList();
037
038    @Override
039    public void init() {
040        initializeIfRequired();
041    }
042
043    private void initializeIfRequired() {
044        if(!facetFactories.isEmpty()) {
045            return;
046        }
047        initialize();
048    }
049
050    private void initialize() {
051        for (final Object factoryInstanceOrClass : facetFactoryInstancesOrClasses) {
052            final FacetFactory facetFactory = asFacetFactory(factoryInstanceOrClass);
053            facetFactories.add(facetFactory);
054        }
055    }
056
057    private static FacetFactory asFacetFactory(final Object factoryInstanceOrClass) {
058        if(factoryInstanceOrClass instanceof FacetFactory) {
059            return (FacetFactory) factoryInstanceOrClass;
060        } else {
061            @SuppressWarnings("unchecked")
062            Class<? extends FacetFactory> factoryClass = (Class<? extends FacetFactory>) factoryInstanceOrClass;
063            return (FacetFactory) InstanceUtil.createInstance(factoryClass);
064        }
065    }
066
067    private void assertNotInitialized() {
068        if(!facetFactories.isEmpty()) {
069            throw new IllegalStateException("Programming model already initialized");
070        }
071    }
072
073
074    @Override
075    public final List<FacetFactory> getList() {
076        initializeIfRequired();
077        return Collections.unmodifiableList(facetFactories);
078    }
079
080    @Override
081    public final void addFactory(final Class<? extends FacetFactory> factoryClass) {
082        assertNotInitialized();
083        facetFactoryInstancesOrClasses.add(factoryClass);
084    }
085
086    @Override
087    public final void removeFactory(final Class<? extends FacetFactory> factoryClass) {
088        assertNotInitialized();
089        facetFactoryInstancesOrClasses.remove(factoryClass);
090    }
091
092    @Override
093    public void addFactory(FacetFactory facetFactory) {
094        assertNotInitialized();
095        facetFactoryInstancesOrClasses.add(facetFactory);
096    }
097
098    @Override
099    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
100        for (FacetFactory facetFactory : getList()) {
101            if(facetFactory instanceof MetaModelValidatorRefiner) {
102                MetaModelValidatorRefiner metaModelValidatorRefiner = (MetaModelValidatorRefiner) facetFactory;
103                metaModelValidatorRefiner.refineMetaModelValidator(metaModelValidator, configuration);
104            }
105        }
106    }
107}