Equals Template for IntelliJ using instanceof, instead of getClass

instanceof Equals Template

#parse("equalsHelper.vm")
public boolean equals(##
#if ($settings.generateFinalParameters)
  final ##
#end
Object $paramName){
  #addEqualsPrologue()
  #addClassInstance()
  return ##
   #set($i = 0)
   #foreach($field in $fields)
     #if ($i > 0)
     &&
     #end
     #set($i = $i + 1)
     #if ($field.primitive)
       #if ($field.double || $field.float)
         #addDoubleFieldComparisonConditionDirect($field) ##
       #else
         #addPrimitiveFieldComparisonConditionDirect($field) ##
       #end
     #elseif ($field.enum)
       #addPrimitiveFieldComparisonConditionDirect($field) ##
     #elseif ($field.array)
java.util.Arrays.equals($field.accessor, ${classInstanceName}.$field.accessor)##
     #elseif ($field.notNull)
${field.accessor}.equals(${classInstanceName}.$field.accessor)##
     #else
java.util.Objects.equals($field.accessor, ${classInstanceName}.$field.accessor)##
     #end
   #end
  ;
}

This gist is for adding a equals template to IntelliJ (v14.1+) that uses an instanceof implementation, instead of getClass, in the case that a non-final class overrides of the equals method.
To read more about this issue I can recommend the following sources:
instanceof or getClass
instanceof versus getClass in equals Methods

I am as of Java 21 using the following template, that copies/overwrites some of the stuff from the IntelliJ baked-in template:

#parse("equalsHelper.vm")
#set($paramName = "other")
#set($classInstanceName = "that")
public boolean equals(##
#if ($settings.generateFinalParameters)
  final ##
#end
Object $paramName){
if (this == $paramName) {
  return true;
}

if (!($paramName instanceof $classname#generateWildcards() $classInstanceName)) {
  return false;
}
#if ($superHasEquals)

if(!super.equals($paramName)) {
  return false;
}
#end

return ##
#set($i = 0)
#foreach($field in $fields)
  #if ($i > 0)
  
  && ##
  #end
  #set($i = $i + 1)
  #if ($field.primitive)
    #if ($field.double || $field.float)
      #addDoubleFieldComparisonConditionDirect($field) ##
    #else
      #addPrimitiveFieldComparisonConditionDirect($field) ##
    #end
  #elseif ($field.enum)
    #addPrimitiveFieldComparisonConditionDirect($field) ##
  #elseif ($field.array)
  java.util.Objects.deepEquals($field.accessor, ${classInstanceName}.$field.accessor)##
  #else
  java.util.Objects.equals($field.accessor, ${classInstanceName}.$field.accessor)##
  #end
#end
;
}

Example output (null-check is superfluous because of the magic of instanceof):

@Override
public boolean equals(Object other) {
	if (this == other) {
		return true;
	}

	if (!(other instanceof MyAwesomeClass<?> that)) {
		return false;
	}

	return Objects.equals(source, that.source)
		&& Objects.equals(id, that.id)
		&& Objects.equals(context, that.context);
}