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Prevent NestedOptionals from throwing an NPE #412

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merged 2 commits into from
Dec 16, 2022
Merged

Prevent NestedOptionals from throwing an NPE #412

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8f83c82
fix: NPE thrown in NestedOptionals
gtoison Dec 14, 2022
27e28e2
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Stephan202 Dec 14, 2022
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9 changes: 6 additions & 3 deletions error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/NestedOptionals.java
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Original file line number Diff line number Diff line change
Expand Up @@ -41,8 +41,11 @@ public NestedOptionals() {}

@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
return state.getTypes().isSubtype(ASTHelpers.getType(tree), OPTIONAL_OF_OPTIONAL.get(state))
? describeMatch(tree)
: Description.NO_MATCH;
Type type = OPTIONAL_OF_OPTIONAL.get(state);
if (type == null || !state.getTypes().isSubtype(ASTHelpers.getType(tree), type)) {
return Description.NO_MATCH;
}

return describeMatch(tree);
}
}
15 changes: 15 additions & 0 deletions ...r-prone-contrib/src/test/java/tech/picnic/errorprone/bugpatterns/NestedOptionalsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -39,4 +39,19 @@ void identification() {
"}")
.doTest();
}

@Test
void identificationOptionalTypeNotLoaded() {
compilationTestHelper
.addSourceLines(
"A.java",
"import java.time.Duration;",
"",
"class A {",
" void m() {",
" Duration.ofSeconds(1);",
" }",
"}")
.doTest();
}
}