com.facebook.buck.query.OwnerFunction.java Source code

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Here is the source code for com.facebook.buck.query.OwnerFunction.java

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/*
 * 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.Sets;
import com.google.common.util.concurrent.ListeningExecutorService;

import java.util.Set;

/**
 * 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 Set<QueryTarget> eval(QueryEnvironment env, ImmutableList<Argument> args,
            ListeningExecutorService executor) throws QueryException, InterruptedException {

        return Sets.newHashSet(env.getFileOwners(ImmutableList.of(args.get(0).getWord()), executor));
    }

}