/*
* Copyright 2015-present Facebook, Inc.
*
* 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.facebook.buck.query;
import com.facebook.buck.query.QueryEnvironment.Argument;
import com.facebook.buck.query.QueryEnvironment.ArgumentType;
import com.facebook.buck.query.QueryEnvironment.QueryFunction;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.ListeningExecutorService;
/**
* A "owner" query expression, which computes the rules that own the given files.
*
* <pre>expr ::= OWNER '(' WORD ')'</pre>
*/
public class OwnerFunction implements QueryFunction {
private static final ImmutableList<ArgumentType> ARGUMENT_TYPES =
ImmutableList.of(ArgumentType.WORD);
public OwnerFunction() {}
@Override
public String getName() {
return "owner";
}
@Override
public int getMandatoryArguments() {
return 1;
}
@Override
public ImmutableList<ArgumentType> getArgumentTypes() {
return ARGUMENT_TYPES;
}
@Override
public ImmutableSet<QueryTarget> eval(
QueryEnvironment env, ImmutableList<Argument> args, ListeningExecutorService executor)
throws QueryException, InterruptedException {
return env.getFileOwners(ImmutableList.of(args.get(0).getWord()), executor);
}
}