blob: 8396a8daa248759cdace22c089edc834c5ccf206 [file] [log] [blame]
// Copyright 2022 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.skyframe;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.function.Function;
import javax.annotation.Nullable;
/** Simple implementation of {@link SkyframeLookupResult}. */
public final class SimpleSkyframeLookupResult implements SkyframeLookupResult {
private final Runnable valuesMissingCallback;
private final Function<SkyKey, ValueOrUntypedException> valuesOrExceptions;
public SimpleSkyframeLookupResult(
Runnable valuesMissingCallback,
Function<SkyKey, ValueOrUntypedException> valuesOrExceptions) {
this.valuesMissingCallback = checkNotNull(valuesMissingCallback);
this.valuesOrExceptions = checkNotNull(valuesOrExceptions);
}
/** Similar to {@link #getOrThrow(SkyKey, Class)}, but takes three exception class parameters. */
@Nullable
@Override
public <E1 extends Exception, E2 extends Exception, E3 extends Exception> SkyValue getOrThrow(
SkyKey skyKey,
@Nullable Class<E1> exceptionClass1,
@Nullable Class<E2> exceptionClass2,
@Nullable Class<E3> exceptionClass3)
throws E1, E2, E3 {
ValueOrUntypedException voe =
checkNotNull(valuesOrExceptions.apply(skyKey), "Missing value for %s", skyKey);
SkyValue value = voe.getValue();
if (value != null) {
return value;
}
SkyFunctionException.throwIfInstanceOf(
voe.getException(), exceptionClass1, exceptionClass2, exceptionClass3, null);
valuesMissingCallback.run();
return null;
}
@Override
public boolean queryDep(SkyKey key, QueryDepCallback resultCallback) {
ValueOrUntypedException voe =
checkNotNull(valuesOrExceptions.apply(key), "Missing value for %s", key);
SkyValue value = voe.getValue();
if (value != null) {
resultCallback.acceptValue(key, value);
return true;
}
Exception exception = voe.getException();
if (exception != null && resultCallback.tryHandleException(key, exception)) {
return true;
}
valuesMissingCallback.run();
return false;
}
}