A data type that represents the NULL value of a given SQL data type. More...

Inheritance diagram for Deveel.Data.Types.NullType:

Public Member Functions
	NullType (SqlTypeCode typeCode)
	Constructs the type with the given SqlTypeCode. More...

override void	SerializeObject (Stream stream, ISqlObject obj)

override ISqlObject	DeserializeObject (Stream stream)

override object	ConvertTo (ISqlObject obj, Type destType)

Public Member Functions inherited from Deveel.Data.Types.SqlType
virtual bool	IsComparable (SqlType type)
	Verifies if a given SqlType is comparable to this data-type. More...

virtual bool	CanCastTo (SqlType destType)
	Verifies if this type can cast any value to the given SqlType. More...

virtual DataObject	CastTo (DataObject value, SqlType destType)
	Converts the given object value to a SqlType specified. More...

virtual ISqlObject	Add (ISqlObject a, ISqlObject b)

virtual ISqlObject	Subtract (ISqlObject a, ISqlObject b)

virtual ISqlObject	Multiply (ISqlObject a, ISqlObject b)

virtual ISqlObject	Divide (ISqlObject a, ISqlObject b)

virtual ISqlObject	Modulus (ISqlObject a, ISqlObject b)

virtual ISqlObject	Negate (ISqlObject value)

virtual SqlBoolean	IsEqualTo (ISqlObject a, ISqlObject b)

virtual SqlBoolean	IsNotEqualTo (ISqlObject a, ISqlObject b)

virtual SqlBoolean	IsGreatherThan (ISqlObject a, ISqlObject b)

virtual SqlBoolean	IsSmallerThan (ISqlObject a, ISqlObject b)

virtual SqlBoolean	IsGreaterOrEqualThan (ISqlObject a, ISqlObject b)

virtual SqlBoolean	IsSmallerOrEqualThan (ISqlObject a, ISqlObject b)

virtual ISqlObject	And (ISqlObject a, ISqlObject b)

virtual ISqlObject	Or (ISqlObject a, ISqlObject b)

virtual ISqlObject	XOr (ISqlObject x, ISqlObject y)

virtual ISqlObject	UnaryPlus (ISqlObject value)

virtual ISqlObject	Reverse (ISqlObject value)

virtual SqlType	Wider (SqlType otherType)
	Gets the one data-type between this and the other one given that handles the wider range of values. More...

virtual int	Compare (ISqlObject x, ISqlObject y)

override bool	Equals (object obj)

override int	GetHashCode ()

virtual bool	Equals (SqlType other)

override string	ToString ()

virtual bool	IsCacheable (ISqlObject value)

virtual Type	GetRuntimeType ()

virtual Type	GetObjectType ()

virtual ISqlObject	CreateFromLargeObject (ILargeObject objRef)

virtual ISqlObject	CreateFrom (object value)

Private Member Functions
	NullType (ObjectData data)

Additional Inherited Members
Static Public Member Functions inherited from Deveel.Data.Types.SqlType
static SqlType	Parse (string s)
	Parses a SQL formatted string that defines a data-type into a constructed SqlType object equivalent. More...

static SqlType	Parse (IContext context, string s)
	Parses a SQL formatted string that defines a data-type into a constructed SqlType object equivalent. More...

static bool	IsPrimitiveType (SqlTypeCode typeCode)

static SqlType	Resolve (SqlTypeCode typeCode)

static SqlType	Resolve (SqlTypeCode typeCode, DataTypeMeta[] meta)

static SqlType	Resolve (SqlTypeCode typeCode, DataTypeMeta[] meta, ITypeResolver resolver)

static SqlType	Resolve (SqlTypeCode typeCode, string name)

static SqlType	Resolve (SqlTypeCode typeCode, string name, DataTypeMeta[] meta)

static SqlType	Resolve (string name)

static SqlType	Resolve (string name, DataTypeMeta[] meta)

static SqlType	Resolve (string name, DataTypeMeta[] meta, ITypeResolver resolver)

static SqlType	Resolve (SqlTypeCode typeCode, string name, DataTypeMeta[] meta, ITypeResolver resolver)

Protected Member Functions inherited from Deveel.Data.Types.SqlType
	SqlType (SqlTypeCode sqlType)
	Constructs the SqlType for the given specific SQL TYPE. More...

	SqlType (string name, SqlTypeCode typeCode)
	Constructs the SqlType for the given specific SQL TYPE and a given name. More...

	SqlType (ObjectData data)

virtual void	GetData (SerializeData data)

Package Functions inherited from Deveel.Data.Types.SqlType
virtual int	GetCacheUsage (ISqlObject value)

virtual int	ColumnSizeOf (ISqlObject obj)

Properties inherited from Deveel.Data.Types.SqlType
string	Name `[get, private set]`
	Gets the name of the data-type that is used to resolve it within the context. More...

SqlTypeCode	TypeCode `[get, private set]`
	Gets the kind of SQL type this data-type handles. More...

virtual bool	IsIndexable `[get]`
	Indicates if the values handled by the type can be part of an index. More...

bool	IsPrimitive `[get]`
	Gets a value indicating if this data-type is primitive. More...

bool	IsNull `[get]`

virtual bool	IsStorable `[get]`

Detailed Description

A data type that represents the NULL value of a given SQL data type.

Definition at line 29 of file NullType.cs.

Constructor & Destructor Documentation

Deveel.Data.Types.NullType.NullType ( SqlTypeCode typeCode )

inline

Constructs the type with the given SqlTypeCode.

Parameters

typeCode

Definition at line 34 of file NullType.cs.

35 : base("NULL", typeCode) {

36 }

Deveel.Data.Types.NullType.NullType ( ObjectData data )

inlineprivate

Definition at line 38 of file NullType.cs.

39 : base(data) {

40 }

Member Function Documentation

override object Deveel.Data.Types.NullType.ConvertTo	(	ISqlObject	obj,
		Type	destType
	)

inlinevirtual

Reimplemented from Deveel.Data.Types.SqlType.

Definition at line 69 of file NullType.cs.

                                                                         {
             if (obj == null || obj.IsNull)
                 return null;
 
             throw new InvalidCastException();
         }

override ISqlObject Deveel.Data.Types.NullType.DeserializeObject ( Stream stream )

inlinevirtual

Reimplemented from Deveel.Data.Types.SqlType.

Definition at line 54 of file NullType.cs.

                                                                     {
             var reader = new BinaryReader(stream);
             var type = reader.ReadByte();
 
             if (type == 1)
                 return SqlNull.Value;
             if (type == 2) {
                 // TODO: check the SQL Type Code of the type and construct the
                 //       NULL value specific for the type.
                 throw new NotImplementedException();
             }
 
             throw new FormatException();
         }

override void Deveel.Data.Types.NullType.SerializeObject	(	Stream	stream,
		ISqlObject	obj
	)

inlinevirtual

Reimplemented from Deveel.Data.Types.SqlType.

Definition at line 42 of file NullType.cs.

                                                                             {
             var writer = new BinaryWriter(stream);
 
             if (obj is SqlNull) {
                 writer.Write((byte)1);
             } else if (obj == null || obj.IsNull) {
                 writer.Write((byte) 2);
             } else {
                 throw new FormatException();
             }
         }

The documentation for this class was generated from the following file:

/var/calculate/remote/distfiles/egit-src/deveeldb.git/src/deveeldb/Deveel.Data.Types/NullType.cs

Public Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation