public boolean validate() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "validate");
TypeInfo lType = _lhsExp.getType();
TypeInfo mType = _midExp.getType();
TypeInfo rType = _rhsExp.getType();
if (!lType.getIsArray() && !mType.getIsArray() && !rType.getIsArray() &&
TypeResolver.isCalendar(lType) && TypeResolver.isCalendar(mType)
&& TypeResolver.isCalendar(rType))
{
_dataType.setType(TypeConstants.booleanType);
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");