Class MathematicalExpression
The base-class for all mathematical expressions.
Implements
Inherited Members
Namespace: SuperOffice.Data.SQL
Assembly: SoDataBase.dll
Syntax
public abstract class MathematicalExpression : Argument, ICloneableConstructors
MathematicalExpression(FieldDataType, Int32)
Initializes a new instance of the MathematicalExpression class, and takes datatype and length as in-parameters.
Declaration
public MathematicalExpression(FieldDataType dataType, int length)Parameters
| Type | Name | Description |
|---|---|---|
| FieldDataType | dataType | Type of the data. |
| Int32 | length | The length. |
MathematicalExpression(Argument, Argument)
Initializes a new instance of the MathematicalExpression class, and takes left and right as in-parameters.
Declaration
public MathematicalExpression(Argument left, Argument right)Parameters
| Type | Name | Description |
|---|---|---|
| Argument | left | The left-hand-side of the operation. |
| Argument | right | The right-hand-side of the operation. |
Remarks
Will validate that the incoming parameters are not null.
MathematicalExpression(Argument[])
Default constructor.
Declaration
public MathematicalExpression(params Argument[] arguments)Parameters
| Type | Name | Description |
|---|---|---|
| Argument[] | arguments |
Fields
_args
If Mathematical operation have several in-parameters,
an array of arguments is used to hold the parameters instead
of the left and right class-variables.
Declaration
protected Argument[] _argsField Value
| Type | Description |
|---|---|
| Argument[] |
Properties
Arguments
Get method for the argument collection.
Declaration
public Argument[] Arguments { get; }Property Value
| Type | Description |
|---|---|
| Argument[] |
Left
The left hand side of the operation.
Declaration
public Argument Left { get; set; }Property Value
| Type | Description |
|---|---|
| Argument |
Right
The right hand side of the operation.
Declaration
public Argument Right { get; set; }Property Value
| Type | Description |
|---|---|
| Argument |
Methods
GetMainField()
Information about a database field.
Declaration
public override FieldInfo GetMainField()Returns
| Type | Description |
|---|---|
| FieldInfo | Information about the database field |
Overrides
ToString()
String output.
Declaration
public override string ToString()Returns
| Type | Description |
|---|---|
| String | a MATHOP b |
Overrides
ValidateArgumentCollection()
Validates the class' argument-collection.
Declaration
protected virtual void ValidateArgumentCollection()Remarks
The validation is common for Subtract, Multiply and Divide. Add needs to validate the collection itselves because of the functions possibility to do an add-operation on strings.
ValidateFieldInfoParameter(FieldInfo, Parameter)
ValidateFieldInfoParameter validates that the operation can be done on a FieldInfo and a Parameter.
Declaration
protected virtual void ValidateFieldInfoParameter(FieldInfo left, Parameter right)Parameters
| Type | Name | Description |
|---|---|---|
| FieldInfo | left | The left-hand-side of the operation. |
| Parameter | right | The right-hand-side of the operation. |
Remarks
Validates that the Parameters is not 0 (zero).
ValidateParameterArgumentsForZeroValue(Parameter, Parameter)
ValidateParameterArguments validates that the operation can be done on two Parameters.
Declaration
protected virtual void ValidateParameterArgumentsForZeroValue(Parameter left, Parameter right)Parameters
| Type | Name | Description |
|---|---|---|
| Parameter | left | The left-hand-side of the operation. |
| Parameter | right | The right-hand-side of the operation. |
Remarks
Validates that the value of both sides is not 0 (zero).