PreconditionsRules

SUGGESTION

Simplification

View source code on GitHub

Suppression

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

Table of contents

1. CheckArgumentNot
2. CheckArgumentNotWithString
3. CheckElementIndex
4. RequireNonNullExpression
5. RequireNonNullBlock
6. RequireNonNullWithStringExpression
7. RequireNonNullWithStringBlock
8. CheckPositionIndex
9. CheckPositionIndexWithString
10. CheckStateNot
11. CheckStateNotWithString

CheckArgumentNot

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckArgumentNot() {
-  if ("foo".isEmpty()) {
-    throw new IllegalArgumentException();
-  }
-  if (!"bar".isEmpty()) {
-    throw new IllegalArgumentException();
-  }
+  checkArgument(!"foo".isEmpty());
+  checkArgument("bar".isEmpty());
 }

CheckArgumentNotWithString

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckArgumentNotWithString() {
-  if ("foo".isEmpty()) {
-    throw new IllegalArgumentException("bar");
-  }
-  if (!"baz".isEmpty()) {
-    throw new IllegalArgumentException("qux");
-  }
+  checkArgument(!"foo".isEmpty(), "bar");
+  checkArgument("baz".isEmpty(), "qux");
 }

CheckElementIndex

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckElementIndex() {
-  if (1 < 0 || 1 >= 2) {
-    throw new IndexOutOfBoundsException("foo");
-  }
+  checkElementIndex(1, 2, "foo");
 }

RequireNonNullExpression

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 ImmutableSet<String> testRequireNonNullExpression() {
-  return ImmutableSet.of(checkNotNull("foo"), Optional.of("bar").orElse("baz"));
+  return ImmutableSet.of(requireNonNull("foo"), requireNonNull("bar"));
 }

RequireNonNullBlock

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testRequireNonNullBlock() {
-  if ("foo" == null) {
-    throw new NullPointerException();
-  }
+  requireNonNull("foo");
 }

RequireNonNullWithStringExpression

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 String testRequireNonNullWithStringExpression() {
-  return checkNotNull("foo", "bar");
+  return requireNonNull("foo", "bar");
 }

RequireNonNullWithStringBlock

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testRequireNonNullWithStringBlock() {
-  if ("foo" == null) {
-    throw new NullPointerException("bar");
-  }
+  requireNonNull("foo", "bar");
 }

CheckPositionIndex

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckPositionIndex() {
-  if (1 < 0 || 1 > 2) {
-    throw new IndexOutOfBoundsException();
-  }
+  checkPositionIndex(1, 2);
 }

CheckPositionIndexWithString

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckPositionIndexWithString() {
-  if (1 < 0 || 1 > 2) {
-    throw new IndexOutOfBoundsException("foo");
-  }
+  checkPositionIndex(1, 2, "foo");
 }

CheckStateNot

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckStateNot() {
-  if ("foo".isEmpty()) {
-    throw new IllegalStateException();
-  }
+  checkState(!"foo".isEmpty());
 }

CheckStateNotWithString

SUGGESTION

Simplification

Suppression

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

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

Samples

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

 void testCheckStateNotWithString() {
-  if ("foo".isEmpty()) {
-    throw new IllegalStateException("bar");
-  }
+  checkState(!"foo".isEmpty(), "bar");
 }