/*
* Copyright 2003-2014 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.cache;
import jetbrains.mps.persistence.binary.BareNodeReader;
import jetbrains.mps.persistence.binary.BareNodeWriter;
import jetbrains.mps.util.io.ModelInputStream;
import jetbrains.mps.util.io.ModelOutputStream;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SModelReference;
import org.jetbrains.mps.openapi.model.SNode;
import java.io.IOException;
import java.util.List;
/**
* Evgeny Gryaznov, Sep 22, 2010
*/
public class TransientModelPersistence {
private static final int VERSION = 6;
private final SModelReference myModelReference;
public TransientModelPersistence(@NotNull SModelReference modelReference) {
this.myModelReference = modelReference;
}
public void saveModel(List<SNode> roots, ModelOutputStream os) throws IOException {
os.writeInt(VERSION);
new BareNodeWriter(myModelReference, os).writeNodes(roots);
}
public List<SNode> loadModel(ModelInputStream is) throws IOException {
int version = is.readInt();
if (version != VERSION) {
return null;
}
return new BareNodeReader(myModelReference, is).readChildren(null);
}
}