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// Copyright 2018 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.skyframe;
import static java.nio.charset.StandardCharsets.US_ASCII;
import com.google.common.io.BaseEncoding;
import com.google.devtools.build.lib.actions.ActionInput;
import com.google.devtools.build.lib.actions.ActionInputMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.protobuf.ByteString;
import javax.annotation.Nullable;
/** A mapping from artifacts to metadata. */
interface InputArtifactData {
boolean contains(ActionInput input);
@Nullable
FileArtifactValue get(ActionInput input);
@Nullable
FileArtifactValue get(PathFragment execPath);
@Nullable
ActionInput getInput(String execpath);
/**
* This implementation has a privileged {@link put} method supporting mutations.
*
* <p>Action execution has distinct phases where this data can be read from multiple threads. It's
* important that the underlying data is not modified during those phases.
*/
final class MutableInputArtifactData implements InputArtifactData {
private final ActionInputMap inputs;
public MutableInputArtifactData(int sizeHint) {
this.inputs = new ActionInputMap(sizeHint);
}
@Override
public boolean contains(ActionInput input) {
return inputs.getMetadata(input) != null;
}
@Override
@Nullable
public FileArtifactValue get(ActionInput input) {
return (FileArtifactValue) inputs.getMetadata(input);
}
@Override
@Nullable
public FileArtifactValue get(PathFragment execPath) {
return (FileArtifactValue) inputs.getMetadata(execPath.getPathString());
}
@Override
public ActionInput getInput(String execPath) {
return inputs.getInput(execPath);
}
public void put(Artifact artifact, FileArtifactValue value) {
inputs.put(artifact, value);
}
@Override
public String toString() {
return inputs.toString();
}
private static ByteString toByteString(byte[] digest) {
return ByteString.copyFrom(
BaseEncoding.base16().lowerCase().encode(digest).getBytes(US_ASCII));
}
}
}
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