/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.smodel.language;
import jetbrains.mps.smodel.adapter.ids.MetaIdFactory;
import jetbrains.mps.smodel.adapter.ids.SConceptId;
import jetbrains.mps.smodel.runtime.ConceptDescriptor;
import jetbrains.mps.smodel.runtime.StructureAspectDescriptor;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Actually it is a ConceptRegistry but we cannot use that name
* <p/>
* This is an interface to generated {@link StructureAspectDescriptor} and as such shall not operate with anything
* but {@link ConceptDescriptor} and {@link SConceptId}. Please do not use {@link org.jetbrains.mps.openapi.language.SAbstractConcept} nor
* {@link jetbrains.mps.smodel.adapter.structure.MetaAdapterFactory} here.
*
* Created by apyshkin on 7/15/15.
*/
public class StructureRegistry implements CoreAspectRegistry {
private static final Logger LOG = LogManager.getLogger(StructureRegistry.class);
private final LanguageRegistry myLanguageRegistry;
private final ConceptInLoadingStorage<SConceptId> myStorage = new ConceptInLoadingStorage<>();
private final Map<SConceptId, ConceptDescriptor> myConceptDescriptorsById = new ConcurrentHashMap<>();
public StructureRegistry(LanguageRegistry languageRegistry) {
myLanguageRegistry = languageRegistry;
}
/**
* @return {@code null} if concept wasn't found
*/
@Nullable
public ConceptDescriptor getConceptDescriptor(@NotNull SConceptId concept) {
ConceptDescriptor descriptor = myConceptDescriptorsById.get(concept);
if (descriptor != null) {
return descriptor;
}
if (!myStorage.startLoading(concept)) {
return null;
}
try {
try {
LanguageRuntime languageRuntime = myLanguageRegistry.getLanguage(concept.getLanguageId());
if (languageRuntime != null) {
StructureAspectDescriptor structureAspectDescriptor = languageRuntime.getAspect(StructureAspectDescriptor.class);
if (structureAspectDescriptor == null) {
return null;
}
descriptor = structureAspectDescriptor.getDescriptor(concept);
}
} catch (Throwable e) {
LOG.error("Exception while structure descriptor creating for the concept " + concept, e);
}
if (descriptor == null) {
return null;
}
assert !descriptor.getId().equals(MetaIdFactory.INVALID_CONCEPT_ID);
myConceptDescriptorsById.put(concept, descriptor);
return descriptor;
} finally {
myStorage.finishLoading(concept);
}
}
@Override
public void clear() {
myConceptDescriptorsById.clear();
}
}