/*
* 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.sdk.values;
import com.google.auto.value.AutoValue;
import com.google.common.collect.Iterables;
import org.apache.beam.sdk.annotations.Internal;
/**
* <b><i>For internal use only; no backwards-compatibility guarantees.</i></b>
*
* <p>A (TupleTag, PValue) pair used in the expansion of a {@link PInput} or {@link POutput}.
*/
@AutoValue
@Internal
public abstract class TaggedPValue {
public static TaggedPValue of(TupleTag<?> tag, PValue value) {
return new AutoValue_TaggedPValue(tag, value);
}
public static TaggedPValue ofExpandedValue(PValue value) {
return of(Iterables.getOnlyElement(value.expand().keySet()), value);
}
/**
* Returns the local tag associated with the {@link PValue}.
*/
public abstract TupleTag<?> getTag();
/**
* Returns the {@link PValue}.
*/
public abstract PValue getValue();
}