com.google.errorprone.refaster.UInstanceOf Maven / Gradle / Ivy
/*
* Copyright 2013 The Error Prone Authors.
*
* 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.InstanceOfTree;
import com.sun.source.tree.TreeVisitor;
import com.sun.tools.javac.tree.JCTree.JCInstanceOf;
import java.lang.reflect.Proxy;
import javax.annotation.Nullable;
/**
* {@link UTree} representation of a {@link InstanceOfTree}.
*
* @author [email protected] (Louis Wasserman)
*/
@AutoValue
abstract class UInstanceOf extends UExpression {
public static UInstanceOf create(UExpression expression, UTree type) {
return new AutoValue_UInstanceOf(expression, type);
}
public abstract UExpression getExpression();
public abstract UTree getType();
@Override
public R accept(TreeVisitor visitor, D data) {
InstanceOfTree proxy =
(InstanceOfTree)
Proxy.newProxyInstance(
getClass().getClassLoader(),
new Class[] {InstanceOfTree.class},
(unused, method, args) -> {
switch (method.getName()) {
case "getPattern":
// TODO(cushon): support refaster template matching on instanceof patterns
return null;
case "getExpression":
return getExpression();
case "getType":
return getType();
default:
try {
return method.invoke(UInstanceOf.this, args);
} catch (IllegalArgumentException e) {
throw new LinkageError(method.getName(), e);
}
}
});
return visitor.visitInstanceOf(proxy, data);
}
@Override
public Kind getKind() {
return Kind.INSTANCE_OF;
}
@Override
public JCInstanceOf inline(Inliner inliner) throws CouldNotResolveImportException {
return inliner.maker().TypeTest(getExpression().inline(inliner), getType().inline(inliner));
}
@Override
@Nullable
public Choice visitInstanceOf(InstanceOfTree instanceOf, @Nullable Unifier unifier) {
return getExpression()
.unify(instanceOf.getExpression(), unifier)
.thenChoose(unifications(getType(), instanceOf.getType()));
}
}