This rule is defined by the following XPath expression:
//PrimaryExpression[ PrimaryPrefix[Name [ (ends-with(@Image, '.equals')) ] ] [ (../PrimarySuffix/Arguments/ArgumentList/Expression/PrimaryExpression/PrimaryPrefix/Literal) and ( count(../PrimarySuffix/Arguments/ArgumentList/Expression) = 1 ) ] ] [not(ancestor::Expression/ConditionalAndExpression//EqualityExpression[@Image='!=']//NullLiteral)] [not(ancestor::Expression/ConditionalOrExpression//EqualityExpression[@Image='==']//NullLiteral)]
Example:
class Foo { boolean bar(String x) { return x.equals("2"); // should be "2".equals(x) } }