PntComparator

PntSqlCombiFilter

PntSqlFilter

PntSqlJoinFilter

PntSqlMultiOrFilter

PntSqlSort

PntSqlSpec

evaluate

__clone

__construct

addParamsTo

addPart

andWhere

appliesTo

canBeSortSpec

combi

combine

copy

generateSql

generateSqlForJoins

getDescription

getItemType

getParts

getSql

initPropertyDescriptors

orWhere

setComparatorId

setItemType

setTableAlias

setValue1

setValue2

	/* Return the result of evaluating the supplied object against this. 
   */
	function evaluate($item) {
		$nParts = count($this->parts); 
		if ($nParts == 0)
			return null;
		$keys = array_keys($this->parts);
		$result = $this->parts[$keys[0] ]->evaluate($item);
		for ($i=1; $i<$nParts; $i++) 
			$result = $this->combine( $result, $this->parts[$keys[$i] ]->evaluate($item) );

		return $result;
	}