/*
* 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;
import jetbrains.mps.util.Computable;
import jetbrains.mps.util.ComputeRunnable;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.module.ModelAccess;
import org.jetbrains.mps.openapi.module.SRepository;
/**
* Facility to bridge {@link jetbrains.mps.util.Computable} with openapi's {@link org.jetbrains.mps.openapi.module.ModelAccess} methods.
* As long as {@link jetbrains.mps.util.Computable} is not openapi, we can't expose it in ModelAccess and have to wrap <code>Computable</code> with <code>Runnable</code>.
*
* @see jetbrains.mps.util.ModelComputeRunnable
* @author Artem Tikhomirov
*/
public final class ModelAccessHelper {
private final ModelAccess myModelAccess;
public ModelAccessHelper(@NotNull SRepository repository) {
this(repository.getModelAccess());
}
public ModelAccessHelper(@NotNull org.jetbrains.mps.openapi.module.ModelAccess modelAccess) {
myModelAccess = modelAccess;
}
public <T> T runReadAction(final Computable<T> c) {
final ComputeRunnable<T> r = new ComputeRunnable<T>(c);
myModelAccess.runReadAction(r);
return r.getResult();
}
public <T> T runWriteAction(final Computable<T> c) {
final ComputeRunnable<T> r = new ComputeRunnable<T>(c);
myModelAccess.runWriteAction(r);
return r.getResult();
}
/**
* Handy wrapper for {@link org.jetbrains.mps.openapi.module.ModelAccess#executeCommand(Runnable) executeCommand(new ComputeRunnable(computable))}.
* Shall be invoked from EDT thread.
*/
public <T> T executeCommand(final Computable<T> c) {
final ComputeRunnable<T> r = new ComputeRunnable<T>(c);
myModelAccess.executeCommand(r);
return r.getResult();
}
}