com.google.errorprone.refaster.UForAll.java Source code

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Here is the source code for com.google.errorprone.refaster.UForAll.java

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/*
 * 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.google.common.collect.ImmutableList;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Type.ForAll;
import com.sun.tools.javac.code.Types;
import java.util.List;

/**
 * {@link UType} version of {@link ForAll}.
 *
 * @author lowasser@google.com (Louis Wasserman)
 */
@AutoValue
public abstract class UForAll extends UType {
    public static UForAll create(List<UTypeVar> typeVars, UType quantifiedType) {
        return new AutoValue_UForAll(ImmutableList.copyOf(typeVars), quantifiedType);
    }

    public abstract List<UTypeVar> getTypeVars();

    public abstract UType getQuantifiedType();

    @Override
    public Choice<Unifier> visitForAll(ForAll target, Unifier unifier) {
        Types types = unifier.types();
        try {
            Type myType = inline(new Inliner(unifier.getContext(), Bindings.create()));
            return Choice.condition(types.overrideEquivalent(types.erasure(myType), types.erasure(target)),
                    unifier);
        } catch (CouldNotResolveImportException e) {
            return Choice.none();
        }
    }

    @Override
    public Type inline(Inliner inliner) throws CouldNotResolveImportException {
        return new ForAll(inliner.<Type>inlineList(getTypeVars()), getQuantifiedType().inline(inliner));
    }
}