blob: c699279d20f6fd10010774107a0eb6edb43dc02b [file] [log] [blame]
// Copyright 2018 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.devtools.build.lib.query2.engine.QueryEnvironment.Argument;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryTaskFuture;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/** A function that carries out filtering on the action graph */
public abstract class ActionFilterFunction implements QueryFunction {
@Override
public <T> QueryTaskFuture<Void> eval(
QueryEnvironment<T> env,
QueryExpressionContext<T> context,
QueryExpression expression,
List<Argument> args,
Callback<T> callback) {
String filterPattern = args.get(0).getWord();
try {
Pattern.compile(filterPattern);
} catch (PatternSyntaxException e) {
return env.immediateFailedFuture(
new QueryException(
expression,
String.format(
"Illegal '%s' pattern regexp '%s': %s",
getName(), filterPattern, e.getMessage())));
}
// Do nothing, pass the expression along
return env.eval(args.get(1).getExpression(), context, callback);
}
}