ClassRules

SUGGESTION

Simplification

View source code on GitHub

Suppression

Disable all rules by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$).* as compiler argument.

Table of contents

1. ClassIsInstance
2. Instanceof
3. ClassLiteralIsInstancePredicate
4. ClassReferenceIsInstancePredicate
5. ClassReferenceCast

ClassIsInstance

SUGGESTION

Simplification

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("ClassIsInstance") to the enclosing element.

Disable this rule by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$ClassIsInstance).* as compiler argument.

Samples

Shows the difference in example code before and after the Refaster rule is applied.

 boolean testClassIsInstance() {
-  return CharSequence.class.isAssignableFrom("foo".getClass());
+  return CharSequence.class.isInstance("foo");
 }

Instanceof

SUGGESTION

Simplification

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("Instanceof") to the enclosing element.

Disable this rule by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$Instanceof).* as compiler argument.

Samples

Shows the difference in example code before and after the Refaster rule is applied.

 ImmutableSet<Boolean> testInstanceof() {
   Class<?> clazz = CharSequence.class;
-  return ImmutableSet.of(CharSequence.class.isInstance("foo"), clazz.isInstance("bar"));
+  return ImmutableSet.of("foo" instanceof CharSequence, clazz.isInstance("bar"));
 }

ClassLiteralIsInstancePredicate

SUGGESTION

Simplification

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("ClassLiteralIsInstancePredicate") to the enclosing element.

Disable this rule by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$ClassLiteralIsInstancePredicate).* as compiler argument.

Samples

Shows the difference in example code before and after the Refaster rule is applied.

 Predicate<String> testClassLiteralIsInstancePredicate() {
-  return s -> s instanceof CharSequence;
+  return CharSequence.class::isInstance;
 }

ClassReferenceIsInstancePredicate

SUGGESTION

Simplification

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("ClassReferenceIsInstancePredicate") to the enclosing element.

Disable this rule by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$ClassReferenceIsInstancePredicate).* as compiler argument.

Samples

Shows the difference in example code before and after the Refaster rule is applied.

 Predicate<String> testClassReferenceIsInstancePredicate() {
   Class<?> clazz = CharSequence.class;
-  return s -> clazz.isInstance(s);
+  return clazz::isInstance;
 }

ClassReferenceCast

SUGGESTION

Simplification

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("ClassReferenceCast") to the enclosing element.

Disable this rule by adding -XepOpt:Refaster:NamePattern=^(?!ClassRules\$ClassReferenceCast).* as compiler argument.

Samples

Shows the difference in example code before and after the Refaster rule is applied.

 Function<Number, Integer> testClassReferenceCast() {
-  return i -> Integer.class.cast(i);
+  return Integer.class::cast;
 }