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<?php |
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namespace POData\Providers\Expression; |
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use POData\Providers\Expression\IExpressionProvider; |
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use POData\Providers\Metadata\ResourceType; |
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use POData\UriProcessor\QueryProcessor\ExpressionParser\Expressions\ExpressionType; |
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use POData\Providers\Metadata\Type\IType; |
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use POData\Common\ODataConstants; |
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use POData\UriProcessor\QueryProcessor\FunctionDescription; |
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use POData\UriProcessor\QueryProcessor\ExpressionParser\Expressions\PropertyAccessExpression; |
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/** |
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* Class PHPExpressionProvider |
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* @package POData\UriProcessor\QueryProcessor\ExpressionParser |
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*/ |
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class PHPExpressionProvider implements IExpressionProvider |
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{ |
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const ADD = '+'; |
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const CLOSE_BRACKET = ')'; |
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const COMMA = ','; |
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const DIVIDE = '/'; |
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const SUBTRACT = '-'; |
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const EQUAL = '=='; |
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const GREATER_THAN = '>'; |
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const GREATER_THAN_OR_EQUAL = '>='; |
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const LESS_THAN = '<'; |
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const LESS_THAN_OR_EQUAL = '<='; |
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const LOGICAL_AND = '&&'; |
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const LOGICAL_NOT = '!'; |
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const LOGICAL_OR = '||'; |
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const MEMBER_ACCESS = '->'; |
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const MODULO = '%'; |
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const MULTIPLY = '*'; |
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const NEGATE = '-'; |
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const NOT_EQUAL = '!='; |
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const OPEN_BRACKET = '('; |
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const TYPE_NAMESPACE = 'POData\\Providers\\Metadata\\Type\\'; |
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/** |
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* The name of iterator |
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* |
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* @var string |
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*/ |
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private $iteratorName; |
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/** |
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* The type of the resource pointed by the resource path segment |
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* |
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* @var ResourceType |
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*/ |
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private $_resourceType; |
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/** |
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* @param string $iteratorName The name of the iterator |
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*/ |
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public function __construct($iteratorName) |
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{ |
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$this->iteratorName = $iteratorName; |
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} |
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/** |
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* Get the name of the iterator |
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* |
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* @return string |
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*/ |
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public function getIteratorName() |
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{ |
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return $this->iteratorName; |
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} |
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/** |
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* call-back for setting the resource type. |
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* |
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* @param ResourceType $resourceType The resource type on which the filter |
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* is going to be applied. |
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* |
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* @return void |
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*/ |
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public function setResourceType(ResourceType $resourceType) |
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{ |
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$this->_resourceType = $resourceType; |
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} |
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/** |
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* Call-back for logical expression |
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* |
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* @param ExpressionType $expressionType The type of logical expression. |
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* @param string $left The left expression. |
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* @param string $right The left expression. |
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* |
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* @return string |
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*/ |
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public function onLogicalExpression($expressionType, $left, $right) |
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{ |
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switch ($expressionType) { |
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case ExpressionType::AND_LOGICAL: |
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return $this->_prepareBinaryExpression(self::LOGICAL_AND, $left, $right); |
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case ExpressionType::OR_LOGICAL: |
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return $this->_prepareBinaryExpression(self::LOGICAL_OR, $left, $right); |
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default: |
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throw new \InvalidArgumentException('onLogicalExpression'); |
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} |
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} |
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/** |
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* Call-back for arithmetic expression |
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* |
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* @param ExpressionType $expressionType The type of arithmetic expression. |
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* @param string $left The left expression. |
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* @param string $right The left expression. |
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* |
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* @return string |
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*/ |
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public function onArithmeticExpression($expressionType, $left, $right) |
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{ |
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switch ($expressionType) { |
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case ExpressionType::MULTIPLY: |
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return $this->_prepareBinaryExpression(self::MULTIPLY, $left, $right); |
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case ExpressionType::DIVIDE: |
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return $this->_prepareBinaryExpression(self::DIVIDE, $left, $right); |
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case ExpressionType::MODULO: |
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return $this->_prepareBinaryExpression(self::MODULO, $left, $right); |
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case ExpressionType::ADD: |
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return $this->_prepareBinaryExpression(self::ADD, $left, $right); |
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case ExpressionType::SUBTRACT: |
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return $this->_prepareBinaryExpression(self::SUBTRACT, $left, $right); |
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default: |
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throw new \InvalidArgumentException('onArithmeticExpression'); |
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} |
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} |
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/** |
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* Call-back for relational expression |
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* |
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* @param ExpressionType $expressionType The type of relation expression |
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* @param string $left The left expression |
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* @param string $right The left expression |
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* |
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* @return string |
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*/ |
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public function onRelationalExpression($expressionType, $left, $right) |
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{ |
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switch ($expressionType) { |
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case ExpressionType::GREATERTHAN: |
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return $this->_prepareBinaryExpression(self::GREATER_THAN, $left, $right); |
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case ExpressionType::GREATERTHAN_OR_EQUAL: |
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return $this->_prepareBinaryExpression(self::GREATER_THAN_OR_EQUAL, $left, $right); |
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case ExpressionType::LESSTHAN: |
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return $this->_prepareBinaryExpression(self::LESS_THAN, $left, $right); |
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case ExpressionType::LESSTHAN_OR_EQUAL: |
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return $this->_prepareBinaryExpression(self::LESS_THAN_OR_EQUAL, $left, $right); |
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case ExpressionType::EQUAL: |
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return $this->_prepareBinaryExpression(self::EQUAL, $left, $right); |
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case ExpressionType::NOTEQUAL: |
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return $this->_prepareBinaryExpression(self::NOT_EQUAL, $left, $right); |
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default: |
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throw new \InvalidArgumentException('onArithmeticExpression'); |
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} |
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} |
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/** |
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* Call-back for unary expression |
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* |
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* @param ExpressionType $expressionType The type of unary expression |
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* @param string $child The child expression |
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* |
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* @return string |
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*/ |
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public function onUnaryExpression($expressionType, $child) |
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{ |
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switch ($expressionType) { |
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case ExpressionType::NEGATE: |
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return $this->_prepareUnaryExpression(self::NEGATE, $child); |
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case ExpressionType::NOT_LOGICAL: |
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return $this->_prepareUnaryExpression(self::LOGICAL_NOT, $child); |
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default: |
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throw new \InvalidArgumentException('onUnaryExpression'); |
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} |
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} |
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/** |
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* Call-back for constant expression |
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* |
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* @param IType $type The type of constant |
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* @param mixed $value The value of the constant |
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* |
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* @return string |
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*/ |
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public function onConstantExpression(IType $type, $value) |
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{ |
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if (is_bool($value)) { |
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return var_export($value, true); |
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} else if (is_null($value)) { |
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return var_export(null, true); |
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} |
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return $value; |
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} |
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/** |
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* Call-back for property access expression |
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* |
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* @param PropertyAccessExpression $expression The property access expression |
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* |
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* @return string |
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*/ |
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public function onPropertyAccessExpression($expression) |
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{ |
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$parent = $expression; |
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$variable = null; |
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do { |
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$variable = $parent->getResourceProperty()->getName() . self::MEMBER_ACCESS . $variable; |
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$parent = $parent->getParent(); |
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} while ($parent != null); |
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$variable = rtrim($variable, self::MEMBER_ACCESS); |
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$variable = $this->getIteratorName() . self::MEMBER_ACCESS . $variable; |
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return $variable; |
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} |
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/** |
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* Call-back for function call expression |
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* |
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* @param \POData\UriProcessor\QueryProcessor\FunctionDescription $functionDescription Description of the function. |
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* @param array<string> $params Paameters to the function. |
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* |
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* @return string |
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*/ |
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public function onFunctionCallExpression($functionDescription, $params) |
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{ |
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switch ($functionDescription->name) { |
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case ODataConstants::STRFUN_COMPARE: |
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return "strcmp($params[0], $params[1])"; |
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case ODataConstants::STRFUN_ENDSWITH: |
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return "(strcmp(substr($params[0], strlen($params[0]) - strlen($params[1])), $params[1]) === 0)"; |
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case ODataConstants::STRFUN_INDEXOF: |
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return "strpos($params[0], $params[1])"; |
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case ODataConstants::STRFUN_REPLACE: |
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return "str_replace($params[1], $params[2], $params[0])"; |
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case ODataConstants::STRFUN_STARTSWITH: |
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return "(strpos($params[0], $params[1]) === 0)"; |
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case ODataConstants::STRFUN_TOLOWER: |
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return "strtolower($params[0])"; |
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case ODataConstants::STRFUN_TOUPPER: |
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return "strtoupper($params[0])"; |
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case ODataConstants::STRFUN_TRIM: |
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return "trim($params[0])"; |
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case ODataConstants::STRFUN_SUBSTRING: |
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return count($params) == 3 ? |
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"substr($params[0], $params[1], $params[2])" : "substr($params[0], $params[1])"; |
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case ODataConstants::STRFUN_SUBSTRINGOF: |
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return "(strpos($params[1], $params[0]) !== false)"; |
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case ODataConstants::STRFUN_CONCAT: |
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return $params[0] . ' . ' . $params[1]; |
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case ODataConstants::STRFUN_LENGTH: |
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return "strlen($params[0])"; |
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case ODataConstants::GUIDFUN_EQUAL: |
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return self::TYPE_NAMESPACE . "Guid::guidEqual($params[0], $params[1])"; |
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case ODataConstants::DATETIME_COMPARE: |
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return self::TYPE_NAMESPACE . "DateTime::dateTimeCmp($params[0], $params[1])"; |
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case ODataConstants::DATETIME_YEAR: |
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return self::TYPE_NAMESPACE . "DateTime::year($params[0])"; |
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case ODataConstants::DATETIME_MONTH: |
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return self::TYPE_NAMESPACE . "DateTime::month($params[0])"; |
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case ODataConstants::DATETIME_DAY: |
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return self::TYPE_NAMESPACE . "DateTime::day($params[0])"; |
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case ODataConstants::DATETIME_HOUR: |
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return self::TYPE_NAMESPACE . "DateTime::hour($params[0])"; |
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case ODataConstants::DATETIME_MINUTE: |
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return self::TYPE_NAMESPACE . "DateTime::minute($params[0])"; |
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case ODataConstants::DATETIME_SECOND: |
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return self::TYPE_NAMESPACE . "DateTime::second($params[0])"; |
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case ODataConstants::MATHFUN_ROUND: |
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return "round($params[0])"; |
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case ODataConstants::MATHFUN_CEILING: |
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return "ceil($params[0])"; |
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case ODataConstants::MATHFUN_FLOOR: |
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return "floor($params[0])"; |
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case ODataConstants::BINFUL_EQUAL: |
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return self::TYPE_NAMESPACE . "Binary::binaryEqual($params[0], $params[1])"; |
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case 'is_null': |
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return "is_null($params[0])"; |
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default: |
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throw new \InvalidArgumentException('onFunctionCallExpression'); |
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} |
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} |
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/** |
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* To format binary expression |
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* |
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* @param string $operator The binary operator. |
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* @param string $left The left operand. |
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* @param string $right The right operand. |
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* |
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* @return string |
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*/ |
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6 |
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private function _prepareBinaryExpression($operator, $left, $right) |
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{ |
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return |
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self::OPEN_BRACKET . $left . ' ' . $operator . ' ' . $right . self::CLOSE_BRACKET; |
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} |
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/** |
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* To format unary expression |
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* |
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* @param string $operator The unary operator. |
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* @param string $child The operand. |
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* |
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* @return string |
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*/ |
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6 |
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private function _prepareUnaryExpression($operator, $child) |
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{ |
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return $operator . self::OPEN_BRACKET . $child . self::CLOSE_BRACKET; |
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} |
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public function clear() {} |
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} |