/*
* Copyright 2013 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.refaster;
import com.google.auto.value.AutoValue;
import com.sun.tools.javac.code.BoundKind;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Type.WildcardType;
import javax.annotation.Nullable;
/**
* {@link UType} version of {@link WildcardType}.
*
* @author lowasser@google.com (Louis Wasserman)
*/
@AutoValue
abstract class UWildcardType extends UType {
public static UWildcardType create(BoundKind boundKind, UType bound) {
return new AutoValue_UWildcardType(boundKind, bound);
}
/**
* This corresponds to a plain ? wildcard.
*/
public static UWildcardType create() {
return create(BoundKind.UNBOUND, UClassType.create("java.lang.Object"));
}
abstract BoundKind boundKind();
abstract UType bound();
@Override
@Nullable
public Unifier visitWildcardType(WildcardType wildcard, @Nullable Unifier unifier) {
unifier = boundKind().equals(wildcard.kind) ? unifier : null;
return bound().unify(wildcard.type, unifier);
}
@Override
public Type inline(Inliner inliner) throws CouldNotResolveImportException {
return new WildcardType(
bound().inline(inliner),
boundKind(),
inliner.symtab().boundClass);
}
}