/*
* 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.generator.impl;
import jetbrains.mps.util.containers.ConcurrentHashSet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.model.SModelReference;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* Creates, clones, holds and tracks models instantiated during generation session.
* Unlike TransientModelsModule, has no responsibility whatsoever about exposing/publishing these models
*
* @author Artem Tikhomirov
*/
public class ModelVault<T extends SModel> {
private Set<SModelReference> myModelsToPublish = new ConcurrentHashSet<SModelReference>();
private Set<T> myModels = new ConcurrentHashSet<T>();
public void add(@NotNull T model) {
myModels.add(model);
}
public void remove(@NotNull SModel model) {
myModels.remove(model);
// add/remove deal with myModels only, while publish/forget pair deals with myModelsToPublish.
// if there's need to forget model to publish along with removal from the vault, use explicit forget()
// myModelsToPublish.remove(model.getReference());
}
public void publish(SModelReference modelReference) {
myModelsToPublish.add(modelReference);
}
public void forget(SModelReference modelReference) {
myModelsToPublish.remove(modelReference);
}
public boolean isPublished(SModelReference modelReference) {
return myModelsToPublish.contains(modelReference);
}
public Iterable<T> modelsToPublish() {
HashSet<T> rv = new HashSet<T>(myModels);
HashSet<SModelReference> collected = new HashSet<SModelReference>();
for (Iterator<T> it = rv.iterator(); it.hasNext();) {
final SModelReference next = it.next().getReference();
if (collected.contains(next)) {
throw new IllegalStateException(String.format("There's more than one instance of model identified with reference %s, can't decide which one to publish", next));
}
collected.add(next);
if (!isPublished(next)) {
it.remove();
}
}
return rv;
}
public Iterable<T> modelsNotToPublish() {
HashSet<T> rv = new HashSet<T>(myModels);
for (Iterator<T> it = rv.iterator(); it.hasNext();) {
if (isPublished(it.next().getReference())) {
it.remove();
}
}
return rv;
}
public Iterable<T> allModels() {
return new ArrayList<T>(myModels);
}
public boolean known(@NotNull SModelReference mr) {
for (SModel m : myModels) {
if (mr.equals(m.getReference())) {
return true;
}
}
return false;
}
public boolean known(@NotNull SModel model) {
return myModels.contains(model);
}
public void clear() {
myModelsToPublish.clear();
myModels.clear();
}
}