149 lines
4.2 KiB
Go
149 lines
4.2 KiB
Go
package sqlbuilder
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import "errors"
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type numericExpression interface {
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expression
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Eq(expression numericExpression) boolExpression
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EqL(literal interface{}) boolExpression
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NotEq(expression numericExpression) boolExpression
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NotEqL(literal interface{}) boolExpression
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Gt(rhs numericExpression) boolExpression
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GtEq(rhs numericExpression) boolExpression
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GtEqL(literal interface{}) boolExpression
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Lt(rhs numericExpression) boolExpression
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LtEq(rhs numericExpression) boolExpression
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LtEqL(literal interface{}) boolExpression
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Add(expression numericExpression) numericExpression
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Sub(expression numericExpression) numericExpression
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Mul(expression numericExpression) numericExpression
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Div(expression numericExpression) numericExpression
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}
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type numericInterfaceImpl struct {
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parent numericExpression
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}
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func (n *numericInterfaceImpl) Eq(expression numericExpression) boolExpression {
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return Eq(n.parent, expression)
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}
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func (n *numericInterfaceImpl) EqL(literal interface{}) boolExpression {
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return Eq(n.parent, Literal(literal))
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}
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func (n *numericInterfaceImpl) NotEq(expression numericExpression) boolExpression {
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return NotEq(n.parent, expression)
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}
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func (n *numericInterfaceImpl) NotEqL(literal interface{}) boolExpression {
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return NotEq(n.parent, Literal(literal))
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}
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func (n *numericInterfaceImpl) Gt(expression numericExpression) boolExpression {
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return Gt(n.parent, expression)
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}
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func (n *numericInterfaceImpl) GtEq(expression numericExpression) boolExpression {
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return GtEq(n.parent, expression)
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}
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func (n *numericInterfaceImpl) GtEqL(literal interface{}) boolExpression {
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return GtEq(n.parent, Literal(literal))
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}
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func (n *numericInterfaceImpl) Lt(expression numericExpression) boolExpression {
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return Lt(n.parent, expression)
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}
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func (n *numericInterfaceImpl) LtEq(expression numericExpression) boolExpression {
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return LtEq(n.parent, expression)
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}
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func (n *numericInterfaceImpl) LtEqL(literal interface{}) boolExpression {
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return LtEq(n.parent, Literal(literal))
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}
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func (n *numericInterfaceImpl) Add(expression numericExpression) numericExpression {
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return newBinaryNumericExpression(n.parent, expression, "+")
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}
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func (n *numericInterfaceImpl) Sub(expression numericExpression) numericExpression {
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return newBinaryNumericExpression(n.parent, expression, "-")
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}
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func (n *numericInterfaceImpl) Mul(expression numericExpression) numericExpression {
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return newBinaryNumericExpression(n.parent, expression, "*")
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}
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func (n *numericInterfaceImpl) Div(expression numericExpression) numericExpression {
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return newBinaryNumericExpression(n.parent, expression, "/")
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}
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//---------------------------------------------------//
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type numericLiteral struct {
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numericInterfaceImpl
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literalExpression
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}
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func NewNumericLiteral(value interface{}) numericExpression {
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numericLiteral := numericLiteral{}
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numericLiteral.literalExpression = *Literal(value)
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numericLiteral.numericInterfaceImpl.parent = &numericLiteral
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return &numericLiteral
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}
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//---------------------------------------------------//
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type binaryNumericExpression struct {
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expressionInterfaceImpl
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numericInterfaceImpl
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binaryExpression
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}
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func newBinaryNumericExpression(lhs, rhs expression, operator string) numericExpression {
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numericExpression := binaryNumericExpression{}
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numericExpression.binaryExpression = newBinaryExpression(lhs, rhs, operator)
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numericExpression.expressionInterfaceImpl.parent = &numericExpression
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numericExpression.numericInterfaceImpl.parent = &numericExpression
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return &numericExpression
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}
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//---------------------------------------------------//
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type numericExpressionWrapper struct {
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expressionInterfaceImpl
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numericInterfaceImpl
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expression expression
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}
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func newNumericExpressionWrap(expression expression) numericExpression {
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numericExpressionWrap := numericExpressionWrapper{}
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numericExpressionWrap.expression = expression
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numericExpressionWrap.expressionInterfaceImpl.parent = &numericExpressionWrap
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numericExpressionWrap.numericInterfaceImpl.parent = &numericExpressionWrap
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return &numericExpressionWrap
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}
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func (n *numericExpressionWrapper) serialize(statement statementType, out *queryData) error {
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if n == nil {
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return errors.New("Numeric expression wrapper is nil. ")
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}
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//out.writeString("(")
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err := n.expression.serialize(statement, out)
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//out.writeString(")")
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return err
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}
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