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<?php |
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/** |
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* Xyster Framework |
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* |
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* This source file is subject to the new BSD license that is bundled |
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* with this package in the file LICENSE.txt. |
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* It is also available through the world-wide-web at this URL: |
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* http://www.opensource.org/licenses/bsd-license.php |
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* |
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* @category Xyster |
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* @package Xyster_Data |
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* @copyright Copyright (c) 2007-2008 Irrational Logic (http://irrationallogic.net) |
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* @license http://www.opensource.org/licenses/bsd-license.php New BSD License |
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* @version $Id: Expression.php 219 2008-02-09 18:02:48Z doublecompile $ |
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*/ |
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/** |
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* @see Xyster_Data_Enum |
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*/ |
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require_once 'Xyster/Enum.php'; |
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/** |
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* Enumerated type of Expression operators |
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* |
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* @category Xyster |
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* @package Xyster_Data |
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* @copyright Copyright (c) 2007-2008 Irrational Logic (http://irrationallogic.net) |
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* @license http://www.opensource.org/licenses/bsd-license.php New BSD License |
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*/ |
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class Xyster_Data_Operator_Expression extends Xyster_Enum |
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{ |
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const Eq = '='; |
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const Neq = '<>'; |
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const Lt = '<'; |
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const Gt = '>'; |
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const Gte = '>='; |
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const Lte = '<='; |
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const Like = 'LIKE'; |
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const NotLike = 'NOT LIKE'; |
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const Between = 'BETWEEN'; |
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const NotBetween = 'NOT BETWEEN'; |
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const In = 'IN'; |
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const NotIn = 'NOT IN'; |
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|
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/** |
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* Evaluates the operator for two values |
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* |
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* @param mixed $a |
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* @param mixed $b |
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* @return boolean |
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*/ |
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public function evaluate( $a, $b ) |
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{ |
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$operator = $this->getValue(); |
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|
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$bool = false; |
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$eval = "\$bool = (bool)( \$a %s \$b );"; |
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switch( $operator ) { |
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case "=": |
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eval(sprintf($eval, '==')); |
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break; |
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|
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case "<>": |
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eval(sprintf($eval, '!=')); |
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break; |
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|
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case "LIKE": |
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case "NOT LIKE": |
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$lookend = ( substr($b, 0, 1) == '%' ); |
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$lookbeg = ( substr($b, -1, 1) == '%' ); |
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$lookin = ( $lookbeg && $lookend ); |
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if ( $lookin ) { |
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$bool = strpos($a, substr($b, 1, strlen($b)-2)) > -1; |
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} else if ( $lookbeg ) { |
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$bool = (substr($b, 0, -1) == substr($a, 0, strlen($b)-1)); |
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} else if ( $lookend ) { |
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$match = substr($b, 1); |
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$bool = $match == substr($a, -strlen($match)); |
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} |
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if ( $operator == "NOT LIKE" ) { |
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$bool = !$bool; |
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} |
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break; |
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|
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case "IN": |
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$bool = ( in_array($a, $b) ); |
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break; |
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|
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case "NOT IN": |
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$bool = ( !in_array($a, $b) ); |
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break; |
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|
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case "BETWEEN": |
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$bool = ( $a >= $b[0] ) && ( $a <= $b[1] ); |
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break; |
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|
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case "NOT BETWEEN": |
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$bool = ( $a < $b[0] ) || ( $a > $b[1] ); |
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break; |
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|
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case ">": |
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case "<": |
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case ">=": |
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case "<=": |
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default: |
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eval(sprintf($eval, $operator)); |
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} |
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return $bool; |
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} |
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|
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/** |
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* Uses the Eq operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Eq() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Neq operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Neq() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Lt operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Lt() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Lte operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Lte() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Gt operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Gt() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Gte operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Gte() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Like operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Like() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the NotLike operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function NotLike() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the Between operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function Between() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the NotBetween operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function NotBetween() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the In operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function In() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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|
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/** |
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* Uses the NotIn operator |
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* |
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* @return Xyster_Data_Operator_Expression |
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*/ |
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public static function NotIn() |
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{ |
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return Xyster_Enum::_factory(); |
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} |
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} |