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Fix a crash in JUnitIncompatibleType
Fixes #4291 PiperOrigin-RevId: 615081727
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...main/java/com/google/errorprone/bugpatterns/collectionincompatibletype/IgnoringCasts.java
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/* | ||
* Copyright 2024 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. | ||
*/ | ||
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package com.google.errorprone.bugpatterns.collectionincompatibletype; | ||
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import static com.google.errorprone.util.ASTHelpers.getType; | ||
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import com.google.errorprone.VisitorState; | ||
import com.sun.source.tree.ParenthesizedTree; | ||
import com.sun.source.tree.Tree; | ||
import com.sun.source.tree.TypeCastTree; | ||
import com.sun.source.util.SimpleTreeVisitor; | ||
import com.sun.tools.javac.code.Type; | ||
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/** | ||
* A utility for handling types in cast expressions, shraed by {@link JUnitIncompatibleType} and | ||
* {@link TruthIncompatibleType}. | ||
*/ | ||
final class IgnoringCasts { | ||
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/** | ||
* Returns the most specific type of a cast or its operand, for example returns {@code byte[]} for | ||
* both {@code (byte[]) someObject} and {@code (Object) someByteArray}. | ||
*/ | ||
static Type ignoringCasts(Tree tree, VisitorState state) { | ||
return new SimpleTreeVisitor<Type, Void>() { | ||
@Override | ||
protected Type defaultAction(Tree node, Void unused) { | ||
return getType(node); | ||
} | ||
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@Override | ||
public Type visitTypeCast(TypeCastTree node, Void unused) { | ||
Type castType = getType(node); | ||
Type expressionType = node.getExpression().accept(this, null); | ||
return (castType.isPrimitive() || state.getTypes().isSubtype(castType, expressionType)) | ||
? castType | ||
: expressionType; | ||
} | ||
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@Override | ||
public Type visitParenthesized(ParenthesizedTree node, Void unused) { | ||
return node.getExpression().accept(this, null); | ||
} | ||
}.visit(tree, null); | ||
} | ||
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private IgnoringCasts() {} | ||
} |
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