Package org.apache.derby.iapi.sql

Interface LanguageFactory

All Known Implementing Classes:

GenericLanguageFactory

public interface LanguageFactory

Factory interface for the Language.Interface protocol. This is used via the Database API by users, and is presented as a System Module (not a service module). That could change, but for now this is valid for any database.

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	MODULE	Used to locate this factory by the Monitor basic service.

Method Summary

Modifier and Type	Method	Description
ResultDescription	getResultDescription(ResultColumnDescriptor[] cols, java.lang.String type)	Get a new result description
ResultDescription	getResultDescription(ResultDescription inputResultDescription, int[] theCols)	Get a new result description from the input result description.
ParameterValueSet	newParameterValueSet(ClassInspector ci, int numParms, boolean hasReturnParam)	Get a ParameterValueSet

Field Detail

MODULE

static final java.lang.String MODULE

Used to locate this factory by the Monitor basic service. There needs to be a language factory per database.

See Also:

Constant Field Values

Method Detail

newParameterValueSet

ParameterValueSet newParameterValueSet(ClassInspector ci,
                                       int numParms,
                                       boolean hasReturnParam)

Get a ParameterValueSet

Parameters:

numParms - The number of parameters in the ParameterValueSet

hasReturnParam - true if this parameter set has a return parameter. The return parameter is always the 1st parameter in the list. It is due to a callableStatement like this: ? = CALL myMethod()

Returns:

A new ParameterValueSet with the given number of parms

getResultDescription

ResultDescription getResultDescription(ResultDescription inputResultDescription,
                                       int[] theCols)

Get a new result description from the input result description. Picks only the columns in the column array from the inputResultDescription.

Parameters:

inputResultDescription - the input rd

theCols - non null array of ints

Returns:

ResultDescription the rd

getResultDescription

ResultDescription getResultDescription(ResultColumnDescriptor[] cols,
                                       java.lang.String type)

Get a new result description

Parameters:

cols - an array of col descriptors

type - the statement type

Returns:

ResultDescription the rd