/*
* 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.extapi.persistence.DataSourceBase;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.persistence.MultiStreamDataSource;
import org.jetbrains.mps.openapi.persistence.StreamDataSource;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Adapts MultiStreamDataSource to StreamDataSource (picks one stream).
*/
public class SingleStreamSource extends DataSourceBase implements StreamDataSource {
private final MultiStreamDataSource myDataSource;
private final String myStreamName;
public SingleStreamSource(@NotNull MultiStreamDataSource streamDataSource, @NotNull String name) {
myDataSource = streamDataSource;
myStreamName = name;
}
@Override
public boolean isReadOnly() {
return myDataSource.isReadOnly();
}
@NotNull
@Override
public String getLocation() {
return myStreamName;
}
@Override
public InputStream openInputStream() throws IOException {
return myDataSource.openInputStream(myStreamName);
}
@Override
public OutputStream openOutputStream() throws IOException {
return myDataSource.openOutputStream(myStreamName);
}
}