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<?php |
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namespace POData\Providers\Expression; |
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use POData\Common\ODataConstants; |
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use POData\Providers\Metadata\ResourceType; |
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use POData\Providers\Metadata\Type\IType; |
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use POData\UriProcessor\QueryProcessor\ExpressionParser\Expressions\ExpressionType; |
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use POData\UriProcessor\QueryProcessor\ExpressionParser\Expressions\PropertyAccessExpression; |
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use POData\UriProcessor\QueryProcessor\FunctionDescription; |
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/** |
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* Class PHPExpressionProvider. |
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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 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 $expressionType, $left, $right) |
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{ |
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assert($expressionType instanceof ExpressionType, get_class($expressionType)); |
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switch ($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 $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 $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('onRelationalExpression'); |
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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 $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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} elseif (null === $value) { |
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return var_export(null, true); |
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} |
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return strval($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(PropertyAccessExpression $expression) |
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{ |
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if (null == $this->resourceType) { |
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throw new \InvalidArgumentException('onPropertyAccessExpression - resourceType null'); |
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} |
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if (null == $this->resourceType->getName()) { |
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throw new \InvalidArgumentException('onPropertyAccessExpression - resourceType has no name'); |
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} |
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if (null == $expression->getResourceProperty()) { |
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throw new \InvalidArgumentException('onPropertyAccessExpression - expression has no resource property'); |
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} |
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$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 FunctionDescription $functionDescription Description of the function |
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* @param array<string> $params Parameters to the function |
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* |
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* @return string |
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*/ |
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public function onFunctionCallExpression($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(' . $params[1] . ')), ' |
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.$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] . |
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', ' . $params[2] . ')' : 'substr(' . $params[0] . |
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', ' . $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 |
345
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* @param string $left The left operand |
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* @param string $right The right operand |
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* |
348
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* @return string |
349
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*/ |
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private function prepareBinaryExpression($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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356
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/** |
357
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* To format unary expression. |
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* |
359
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* @param string $operator The unary operator |
360
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* @param string $child The operand |
361
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* |
362
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* @return string |
363
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*/ |
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private function prepareUnaryExpression($operator, $child) |
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{ |
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|
|
|
return $operator . self::OPEN_BRACKET . $child . self::CLOSE_BRACKET; |
367
|
|
|
} |
368
|
|
|
} |
369
|
|
|
|