com.google.devtools.build.lib.analysis.config.ComposingPatchTransition.java Source code

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Here is the source code for com.google.devtools.build.lib.analysis.config.ComposingPatchTransition.java

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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.analysis.config;

import com.google.common.collect.Iterables;

/**
 * A {@link ComposingSplitTransition} that only supports {@link PatchTransition}s
 *
 * <p>Calling code that doesn't want to have to handle splits should prefer this version.
 */
public class ComposingPatchTransition implements PatchTransition {
    private final ComposingSplitTransition delegate;

    public ComposingPatchTransition(PatchTransition transition1, PatchTransition transition2) {
        this.delegate = new ComposingSplitTransition(transition1, transition2);
    }

    @Override
    public boolean defaultsToSelf() {
        throw new UnsupportedOperationException("dynamic configurations don't use global transition tables");
    }

    @Override
    public BuildOptions apply(BuildOptions options) {
        return Iterables.getOnlyElement(delegate.split(options));
    }
}