#vulnerable code 
                             private boolean isDiscriminationFieldMatch(DatastorePersistentEntity entity,
			EntityPropertyValueProvider propertyValueProvider) {
		return propertyValueProvider.getPropertyValue(entity.getDiscriminationFieldName(), EmbeddedType.NOT_EMBEDDED,
				ClassTypeInformation.from(String.class)).equals(entity.getDiscriminationValue());
	} 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             private boolean isDiscriminationFieldMatch(DatastorePersistentEntity entity,
			EntityPropertyValueProvider propertyValueProvider) {
		return ((String[]) propertyValueProvider.getPropertyValue(entity.getDiscriminationFieldName(),
				EmbeddedType.NOT_EMBEDDED,
				ClassTypeInformation.from(String[].class)))[0].equals(entity.getDiscriminationValue());
	}