/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.beam.runners.core;
import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
import org.apache.beam.sdk.values.PCollectionView;
/**
* An implementation of a {@link SideInputReader} that actually does not support side-inputs.
*/
public class UnsupportedSideInputReader implements SideInputReader {
private final String transformName;
public UnsupportedSideInputReader(String transformName) {
this.transformName = transformName;
}
@Override
public <T> T get(PCollectionView<T> view, BoundedWindow window) {
throw new UnsupportedOperationException(
String.format("%s does not support side inputs.", transformName));
}
@Override
public <T> boolean contains(PCollectionView<T> view) {
throw new UnsupportedOperationException(
String.format("%s does not support side inputs.", transformName));
}
@Override
public boolean isEmpty() {
throw new UnsupportedOperationException(
String.format("%s does not support side inputs.", transformName));
}
}