/*
* 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 static com.google.errorprone.refaster.Unifier.unifications;
import com.google.auto.value.AutoValue;
import com.sun.source.tree.Tree;
import com.sun.source.tree.TreeVisitor;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import java.util.Set;
import javax.annotation.Nullable;
/**
* {@code UExpression} imposing a restriction on the kind of the matched expression.
*
* @author lowasser@google.com (Louis Wasserman)
*/
@AutoValue
abstract class UOfKind extends UExpression {
public static UOfKind create(UExpression expression, Set<Kind> allowed) {
return new AutoValue_UOfKind(expression, allowed);
}
abstract UExpression expression();
abstract Set<Kind> allowed();
@Override
public JCExpression inline(Inliner inliner) throws CouldNotResolveImportException {
return expression().inline(inliner);
}
@Override
public <R, D> R accept(TreeVisitor<R, D> visitor, D data) {
return expression().accept(visitor, data);
}
@Override
public Kind getKind() {
return expression().getKind();
}
@Override
@Nullable
protected Choice<Unifier> defaultAction(Tree tree, @Nullable Unifier unifier) {
return Choice.condition(allowed().contains(tree.getKind()), unifier)
.thenChoose(unifications(expression(), tree));
}
}