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// Copyright 2015 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.query2;
import com.google.common.base.Predicate;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.pkgcache.PackageProvider;
import com.google.devtools.build.lib.pkgcache.PathPackageLocator;
import com.google.devtools.build.lib.pkgcache.TargetPatternEvaluator;
import com.google.devtools.build.lib.pkgcache.TransitivePackageLoader;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.Setting;
import com.google.devtools.build.lib.util.Preconditions;
import com.google.devtools.build.skyframe.WalkableGraph.WalkableGraphFactory;
import java.util.List;
import java.util.Set;
import javax.annotation.Nullable;
/** A factory that creates instances of {@code AbstractBlazeQueryEnvironment<Target>}. */
public class QueryEnvironmentFactory {
/** Creates an appropriate {@link AbstractBlazeQueryEnvironment} based on the given options. */
public AbstractBlazeQueryEnvironment<Target> create(
TransitivePackageLoader transitivePackageLoader, WalkableGraphFactory graphFactory,
PackageProvider packageProvider,
TargetPatternEvaluator targetPatternEvaluator, boolean keepGoing, boolean strictScope,
boolean orderedResults, List<String> universeScope, int loadingPhaseThreads,
Predicate<Label> labelFilter,
EventHandler eventHandler, Set<Setting> settings, Iterable<QueryFunction> functions,
@Nullable PathPackageLocator packagePath) {
Preconditions.checkNotNull(universeScope);
if (canUseSkyQuery(orderedResults, universeScope, packagePath)) {
return new SkyQueryEnvironment(keepGoing, strictScope, loadingPhaseThreads, labelFilter,
eventHandler, settings, functions, targetPatternEvaluator.getOffset(), graphFactory,
universeScope, packagePath);
} else {
return new BlazeQueryEnvironment(transitivePackageLoader, packageProvider,
targetPatternEvaluator, keepGoing, strictScope, loadingPhaseThreads, labelFilter,
eventHandler, settings, functions);
}
}
protected static boolean canUseSkyQuery(boolean orderedResults, List<String> universeScope,
@Nullable PathPackageLocator packagePath) {
return !orderedResults && !universeScope.isEmpty() && packagePath != null;
}
}
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