/*
* Copyright 2003-2017 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.extapi.persistence;
import jetbrains.mps.util.IterableUtil;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.annotations.Immutable;
import org.jetbrains.mps.openapi.persistence.ModelFactory;
import org.jetbrains.mps.openapi.persistence.ModelFactoryType;
import org.jetbrains.mps.openapi.persistence.datasource.DataSourceType;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;
/**
* A cosy model factory registry wrapper for iterable of model factories
* NB: reverses the given iterable in the constructor
*/
@Immutable
final class ModelFactoryRegistryInt implements ModelFactoryRegistry {
private static final Logger LOG = LogManager.getLogger(ModelFactoryRegistryInt.class);
private final List<ModelFactory> myFactories;
ModelFactoryRegistryInt(Iterable<ModelFactory> factories) {
myFactories = IterableUtil.asList(factories);
Collections.reverse(myFactories);
}
@NotNull
@Override
@Immutable
public List<ModelFactory> getFactories() {
List<ModelFactory> result = new ArrayList<>(myFactories);
return Collections.unmodifiableList(result);
}
@Nullable
@Override
public ModelFactory getFactoryByType(@NotNull ModelFactoryType factoryType) {
Optional<ModelFactory> first = myFactories.stream()
.filter(factory -> Objects.equals(factoryType, factory.getType()))
.findFirst();
if (first.isPresent()) {
return first.get();
}
return null;
}
@Nullable
@Override
public ModelFactory getDefaultModelFactory(@NotNull DataSourceType dataSourceType) {
List<ModelFactory> modelFactories = getModelFactories(dataSourceType);
if (modelFactories.isEmpty()) {
return null;
}
return modelFactories.get(0);
}
@NotNull
@Override
public List<ModelFactory> getModelFactories(@NotNull DataSourceType dataSourceType) {
return myFactories.stream()
.filter(factory -> getPreferredDataSourceTypes0(factory).contains(dataSourceType))
.collect(Collectors.toList());
}
@NotNull
private List<DataSourceType> getPreferredDataSourceTypes0(ModelFactory factory) {
return factory.getPreferredDataSourceTypes();
}
@Override
public List<ModelFactoryType> getFactoryTypes() {
List<ModelFactoryType> result = myFactories.stream().map(ModelFactory::getType).distinct().collect(Collectors.toList());
return Collections.unmodifiableList(new ArrayList<>(result));
}
}