| // 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.query2.engine; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Sets; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.Argument; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.ArgumentType; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryTaskFuture; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.TargetAccessor; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * A "siblings" query expression, which computes all of the targets in all of the packages of all |
| * the targets to which the argument evaluates. |
| * |
| * <pre>expr ::= SIBLINGS '(' expr ')'</pre> |
| */ |
| public class SiblingsFunction implements QueryFunction { |
| @Override |
| public String getName() { |
| return "siblings"; |
| } |
| |
| @Override |
| public int getMandatoryArguments() { |
| return 1; |
| } |
| |
| @Override |
| public Iterable<ArgumentType> getArgumentTypes() { |
| return ImmutableList.of(ArgumentType.EXPRESSION); |
| } |
| |
| @Override |
| public <T> QueryTaskFuture<Void> eval( |
| QueryEnvironment<T> env, |
| QueryExpressionContext<T> context, |
| final QueryExpression expression, |
| List<Argument> args, |
| final Callback<T> callback) { |
| final TargetAccessor<T> targetAccessor = env.getAccessor(); |
| Set<String> packageNames = Sets.newConcurrentHashSet(); |
| return env.eval( |
| args.get(0).getExpression(), |
| context, |
| new Callback<T>() { |
| @Override |
| public void process(Iterable<T> partialResult) |
| throws QueryException, InterruptedException { |
| for (T target : partialResult) { |
| if (packageNames.add(targetAccessor.getPackage(target))) { |
| callback.process(env.getSiblingTargetsInPackage(target)); |
| } |
| } |
| } |
| }); |
| } |
| } |