C# Class Azavea.Open.DAO.Util.CachingDataReader

A base class to save copying a whole lot of common code for different IDataReader implementations.
Inheritance: IDataReader
Afficher le fichier Open project: azavea/net-dao

Protected Properties

Свойство Type Description
_config DataReaderConfig
_indexesByName int>.IDictionary
_log log4net.ILog
_namesByIndex string[]
_numCols int
_valsByIndex object[]

Méthodes publiques

Méthode Description
Close ( ) : void

Closes the T:System.Data.IDataReader Object.
Dispose ( ) : void

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
GetBoolean ( int i ) : bool

Gets the value of the specified column as a Boolean.
GetByte ( int i ) : byte

Gets the 8-bit unsigned integer value of the specified column.
GetBytes ( int i, long fieldOffset, byte buffer, int bufferoffset, int length ) : long

Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.
GetChar ( int i ) : char

Gets the character value of the specified column.
GetChars ( int i, long fieldoffset, char buffer, int bufferoffset, int length ) : long

Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
GetData ( int i ) : IDataReader

Returns an T:System.Data.IDataReader for the specified column ordinal.
GetDataTypeName ( int i ) : string

Gets the data type information for the specified field.
GetDateTime ( int i ) : System.DateTime

Gets the date and time data value of the specified field.
GetDecimal ( int i ) : decimal

Gets the fixed-position numeric value of the specified field.
GetDouble ( int i ) : double

Gets the double-precision floating point number of the specified field.
GetFieldType ( int i ) : Type

Gets the T:System.Type information corresponding to the type of T:System.Object that would be returned from M:System.Data.IDataRecord.GetValue(System.Int32).
GetFloat ( int i ) : float

Gets the single-precision floating point number of the specified field.
GetGuid ( int i ) : System.Guid

Returns the GUID value of the specified field.
GetInt16 ( int i ) : short

Gets the 16-bit signed integer value of the specified field.
GetInt32 ( int i ) : int

Gets the 32-bit signed integer value of the specified field.
GetInt64 ( int i ) : long

Gets the 64-bit signed integer value of the specified field.
GetName ( int i ) : string

Gets the name for the field to find.
GetOrdinal ( string name ) : int

Return the index of the named field.
GetSchemaTable ( ) : DataTable

Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.
GetString ( int i ) : string

Gets the string value of the specified field.
GetValue ( int i ) : object

Return the value of the specified field.
GetValues ( object values ) : int

Gets all the attribute fields in the collection for the current record.
IsDBNull ( int i ) : bool

Return whether the specified field is set to null.
NextResult ( ) : bool

Advances the data reader to the next result, when reading the results of batch SQL statements.
Read ( ) : bool

Advances the T:System.Data.IDataReader to the next record.

Méthodes protégées

Méthode Description
CachingDataReader ( DataReaderConfig config ) : System

Create the data reader.
ClearVals ( ) : void

Resets the values in _valsByIndex.
FetchNextRow ( ) : bool

Moves the cursor (or whatever the implementation equivilent is) to the next row if there is one.
GetCachedValue ( int i ) : object

Will only ever look up the value once.
GetDataObject ( int i ) : object

This method gets the actual data value from the actual data source.

Private Methods

Méthode Description
this ( int i ) : objectIDataRecord.System

Gets the column located at the specified index.
this ( string name ) : objectIDataRecord.System

Gets the column with the specified name.

Method Details

CachingDataReader() protected méthode

Create the data reader.
protected CachingDataReader ( DataReaderConfig config ) : System
config DataReaderConfig The column indexes in the data, keyed by column name. This may include /// columns not in the mapping.
Résultat System

ClearVals() protected méthode

Resets the values in _valsByIndex.
protected ClearVals ( ) : void
Résultat void

Close() public abstract méthode

Closes the T:System.Data.IDataReader Object.
public abstract Close ( ) : void
Résultat void

Dispose() public méthode

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
public Dispose ( ) : void
Résultat void

FetchNextRow() protected abstract méthode

Moves the cursor (or whatever the implementation equivilent is) to the next row if there is one.
protected abstract FetchNextRow ( ) : bool
Résultat bool

GetBoolean() public méthode

Gets the value of the specified column as a Boolean.
The index passed was outside the range of 0 through .
public GetBoolean ( int i ) : bool
i int The zero-based column ordinal.
Résultat bool

GetByte() public méthode

Gets the 8-bit unsigned integer value of the specified column.
The index passed was outside the range of 0 through .
public GetByte ( int i ) : byte
i int The zero-based column ordinal.
Résultat byte

GetBytes() public abstract méthode

Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.
The index passed was outside the range of 0 through .
public abstract GetBytes ( int i, long fieldOffset, byte buffer, int bufferoffset, int length ) : long
i int The zero-based column ordinal.
fieldOffset long The index within the field from which to start the read operation.
buffer byte The buffer into which to read the stream of bytes.
bufferoffset int The index for to start the read operation.
length int The number of bytes to read.
Résultat long

GetCachedValue() protected méthode

Will only ever look up the value once.
protected GetCachedValue ( int i ) : object
i int 0-based column index.
Résultat object

GetChar() public méthode

Gets the character value of the specified column.
The index passed was outside the range of 0 through .
public GetChar ( int i ) : char
i int The zero-based column ordinal.
Résultat char

GetChars() public abstract méthode

Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
The index passed was outside the range of 0 through .
public abstract GetChars ( int i, long fieldoffset, char buffer, int bufferoffset, int length ) : long
i int The zero-based column ordinal.
fieldoffset long The index within the row from which to start the read operation.
buffer char The buffer into which to read the stream of bytes.
bufferoffset int The index for to start the read operation.
length int The number of bytes to read.
Résultat long

GetData() public abstract méthode

Returns an T:System.Data.IDataReader for the specified column ordinal.
The index passed was outside the range of 0 through .
public abstract GetData ( int i ) : IDataReader
i int The index of the field to find.
Résultat IDataReader

GetDataObject() protected abstract méthode

This method gets the actual data value from the actual data source.
protected abstract GetDataObject ( int i ) : object
i int Column number to get, zero-based.
Résultat object

GetDataTypeName() public méthode

Gets the data type information for the specified field.
The index passed was outside the range of 0 through .
public GetDataTypeName ( int i ) : string
i int The index of the field to find.
Résultat string

GetDateTime() public méthode

Gets the date and time data value of the specified field.
The index passed was outside the range of 0 through .
public GetDateTime ( int i ) : System.DateTime
i int The index of the field to find.
Résultat System.DateTime

GetDecimal() public méthode

Gets the fixed-position numeric value of the specified field.
The index passed was outside the range of 0 through .
public GetDecimal ( int i ) : decimal
i int The index of the field to find.
Résultat decimal

GetDouble() public méthode

Gets the double-precision floating point number of the specified field.
The index passed was outside the range of 0 through .
public GetDouble ( int i ) : double
i int The index of the field to find.
Résultat double

GetFieldType() public abstract méthode

Gets the T:System.Type information corresponding to the type of T:System.Object that would be returned from M:System.Data.IDataRecord.GetValue(System.Int32).
The index passed was outside the range of 0 through .
public abstract GetFieldType ( int i ) : Type
i int The index of the field to find.
Résultat System.Type

GetFloat() public méthode

Gets the single-precision floating point number of the specified field.
The index passed was outside the range of 0 through .
public GetFloat ( int i ) : float
i int The index of the field to find.
Résultat float

GetGuid() public abstract méthode

Returns the GUID value of the specified field.
The index passed was outside the range of 0 through .
public abstract GetGuid ( int i ) : System.Guid
i int The index of the field to find.
Résultat System.Guid

GetInt16() public méthode

Gets the 16-bit signed integer value of the specified field.
The index passed was outside the range of 0 through .
public GetInt16 ( int i ) : short
i int The index of the field to find.
Résultat short

GetInt32() public méthode

Gets the 32-bit signed integer value of the specified field.
The index passed was outside the range of 0 through .
public GetInt32 ( int i ) : int
i int The index of the field to find.
Résultat int

GetInt64() public méthode

Gets the 64-bit signed integer value of the specified field.
The index passed was outside the range of 0 through .
public GetInt64 ( int i ) : long
i int The index of the field to find.
Résultat long

GetName() public abstract méthode

Gets the name for the field to find.
The index passed was outside the range of 0 through .
public abstract GetName ( int i ) : string
i int The index of the field to find.
Résultat string

GetOrdinal() public méthode

Return the index of the named field.
public GetOrdinal ( string name ) : int
name string The name of the field to find.
Résultat int

GetSchemaTable() public abstract méthode

Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.
The is closed.
public abstract GetSchemaTable ( ) : DataTable
Résultat System.Data.DataTable

GetString() public méthode

Gets the string value of the specified field.
The index passed was outside the range of 0 through .
public GetString ( int i ) : string
i int The index of the field to find.
Résultat string

GetValue() public méthode

Return the value of the specified field.
The index passed was outside the range of 0 through .
public GetValue ( int i ) : object
i int The index of the field to find.
Résultat object

GetValues() public abstract méthode

Gets all the attribute fields in the collection for the current record.
public abstract GetValues ( object values ) : int
values object An array of to copy the attribute fields into.
Résultat int

IsDBNull() public méthode

Return whether the specified field is set to null.
The index passed was outside the range of 0 through .
public IsDBNull ( int i ) : bool
i int The index of the field to find.
Résultat bool

NextResult() public abstract méthode

Advances the data reader to the next result, when reading the results of batch SQL statements.
public abstract NextResult ( ) : bool
Résultat bool

Read() public méthode

Advances the T:System.Data.IDataReader to the next record.
public Read ( ) : bool
Résultat bool

Property Details

_config protected_oe property

The config object passed to the constructor. It is available in case the child class needs more data off of it.
protected DataReaderConfig _config
Résultat DataReaderConfig

_indexesByName protected_oe property

The column indexes, keyed by the column name.
protected IDictionary _indexesByName
Résultat int>.IDictionary

_log protected_oe static_oe property

Logger that may be used by this class or its children.
protected static ILog,log4net _log
Résultat log4net.ILog

_namesByIndex protected_oe property

The column names, in order from the data source.
protected string[] _namesByIndex
Résultat string[]

_numCols protected_oe property

The number of columns that the data reader can read.
protected int _numCols
Résultat int

_valsByIndex protected_oe property

The values for this row, in column order.
protected object[] _valsByIndex
Résultat object[]