// Copyright 2015 Google Inc. 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.TargetAccessor;
/**
* A predicate for targets included in the visibility list of a rule.
*
*
A rule's visibility is described by a set of {@link QueryVisibility}. Each element
* in the set corresponds to an entry in the rule's visibility attribute, or an entry in the
* packages attribute of an included package_group.
*/
public abstract class QueryVisibility {
/** Returns true if the visibility specification includes the given target's package. */
public abstract boolean contains(T target);
/** Global visibility. */
@SuppressWarnings("unchecked") // Safe covariant cast.
public static QueryVisibility everything() {
return (QueryVisibility) (Object) EVERYTHING;
}
private static final QueryVisibility> EVERYTHING = new QueryVisibility