| // Copyright 2014 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.base.Functions; |
| import com.google.common.base.Joiner; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| 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 java.util.Collection; |
| import java.util.List; |
| import java.util.concurrent.ForkJoinPool; |
| |
| /** |
| * A query expression for user-defined query functions. |
| */ |
| public class FunctionExpression extends QueryExpression { |
| QueryFunction function; |
| List<Argument> args; |
| |
| public FunctionExpression(QueryFunction function, List<Argument> args) { |
| this.function = function; |
| this.args = ImmutableList.copyOf(args); |
| } |
| |
| public QueryFunction getFunction() { |
| return function; |
| } |
| |
| public List<Argument> getArgs() { |
| return args; |
| } |
| |
| @Override |
| protected <T> void evalImpl( |
| QueryEnvironment<T> env, VariableContext<T> context, Callback<T> callback) |
| throws QueryException, InterruptedException { |
| function.eval(env, context, this, args, callback); |
| } |
| |
| @Override |
| protected <T> void parEvalImpl( |
| QueryEnvironment<T> env, |
| VariableContext<T> context, |
| ThreadSafeCallback<T> callback, |
| ForkJoinPool forkJoinPool) throws QueryException, InterruptedException { |
| function.parEval(env, context, this, args, callback, forkJoinPool); |
| } |
| |
| @Override |
| public void collectTargetPatterns(Collection<String> literals) { |
| for (Argument arg : args) { |
| if (arg.getType() == ArgumentType.EXPRESSION) { |
| arg.getExpression().collectTargetPatterns(literals); |
| } |
| } |
| } |
| |
| @Override |
| public QueryExpression getMapped(QueryExpressionMapper mapper) { |
| return mapper.map(this); |
| } |
| |
| @Override |
| public String toString() { |
| return function.getName() + |
| "(" + Joiner.on(", ").join(Iterables.transform(args, Functions.toStringFunction())) + ")"; |
| } |
| } |