blob: f20dcfc44f26ad08a360d814fc1d898a600abcf1 [file] [log] [blame]
// Copyright 2023 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.actions;
import java.io.IOException;
/** A {@link InputMetadataProvider} implementation that consults two others in a given order. */
public final class DelegatingPairInputMetadataProvider implements InputMetadataProvider {
private final InputMetadataProvider primary;
private final InputMetadataProvider secondary;
public DelegatingPairInputMetadataProvider(
InputMetadataProvider primary, InputMetadataProvider secondary) {
this.primary = primary;
this.secondary = secondary;
}
@Override
public FileArtifactValue getInputMetadata(ActionInput input) throws IOException {
FileArtifactValue metadata = primary.getInputMetadata(input);
return (metadata != null) && (metadata != FileArtifactValue.MISSING_FILE_MARKER)
? metadata
: secondary.getInputMetadata(input);
}
@Override
public ActionInput getInput(String execPath) {
ActionInput input = primary.getInput(execPath);
return input != null ? input : secondary.getInput(execPath);
}
}