/*
* 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.errorprone.predicates.type;
import com.google.errorprone.VisitorState;
import com.google.errorprone.predicates.TypePredicate;
import com.google.errorprone.suppliers.Supplier;
import com.google.errorprone.util.ASTHelpers;
import com.sun.tools.javac.code.Type;
/** Matches sub-types of the given type. */
public class DescendantOf implements TypePredicate {
public final Supplier<Type> expected;
public DescendantOf(Supplier<Type> type) {
this.expected = type;
}
@Override
public boolean apply(Type type, VisitorState state) {
Type bound = expected.get(state);
if (bound == null || type == null) {
// TODO(cushon): type suppliers are allowed to return null :(
return false;
}
return ASTHelpers.isSubtype(type, bound, state);
}
}