GenericLanguageFactory (Apache Derby V10.14 Internals)

java.lang.Object
- org.apache.derby.impl.sql.GenericLanguageFactory

All Implemented Interfaces:

ModuleControl, LanguageFactory
```
public class GenericLanguageFactory
extends java.lang.Object
implements LanguageFactory, ModuleControl
```
The LanguageFactory provides system-wide services that are available on the Database API.

Field Summary

Fields
Modifier and Type Field Description

private GenericParameterValueSet emptySet
- Fields inherited from interface org.apache.derby.iapi.sql.LanguageFactory
  MODULE

Fields
Modifier and Type	Field	Description
`private GenericParameterValueSet`	`emptySet`

Constructor Summary

Constructors
Constructor Description

GenericLanguageFactory()

Constructors
Constructor	Description
`GenericLanguageFactory()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`boot(boolean create, java.util.Properties startParams)`	Start-up method for this instance of the language factory.
`private static java.lang.Object`	`findServiceModule(java.lang.Object serviceModule, java.lang.String factoryInterface)`	Privileged startup.
`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)`	Factory method for getting a ParameterValueSet
`void`	`stop()`	Stop this module.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - emptySet
```
private GenericParameterValueSet emptySet
```
- Constructor Detail
  - GenericLanguageFactory
```
public GenericLanguageFactory()
```
- Method Detail
  - boot
```
public void boot(boolean create,
                 java.util.Properties startParams)
          throws StandardException
```
    Start-up method for this instance of the language factory. This service is expected to be started and accessed relative to a database.
    
    Specified by:
    
    boot in interface ModuleControl
    
    Parameters:
    
    startParams - The start-up parameters (ignored in this case)
    
    Throws:
    
    StandardException - Thrown if module cannot be booted.
    
    See Also:
    
    Monitor, ModuleFactory
  - stop
```
public void stop()
```
    Stop this module. In this case, nothing needs to be done.
    
    Specified by:
    
    stop in interface ModuleControl
    
    See Also:
    
    Monitor, ModuleFactory
  - newParameterValueSet
```
public ParameterValueSet newParameterValueSet(ClassInspector ci,
                                              int numParms,
                                              boolean hasReturnParam)
```
    Factory method for getting a ParameterValueSet
    
    Specified by:
    
    newParameterValueSet in interface LanguageFactory
    
    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
    
    See Also:
    
    LanguageFactory.newParameterValueSet(org.apache.derby.iapi.services.loader.ClassInspector, int, boolean)
  - getResultDescription
```
public 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.
    
    Specified by:
    
    getResultDescription in interface LanguageFactory
    
    Parameters:
    
    inputResultDescription - the input rd
    
    theCols - array of ints, non null
    
    Returns:
    
    ResultDescription the rd
  - getResultDescription
```
public ResultDescription getResultDescription(ResultColumnDescriptor[] cols,
                                              java.lang.String type)
```
    Get a new result description
    
    Specified by:
    
    getResultDescription in interface LanguageFactory
    
    Parameters:
    
    cols - an array of col descriptors
    
    type - the statement type
    
    Returns:
    
    ResultDescription the rd
  - findServiceModule
```
private static java.lang.Object findServiceModule(java.lang.Object serviceModule,
                                                  java.lang.String factoryInterface)
                                           throws StandardException
```
    Privileged startup. Must be private so that user code can't call this entry point.
    
    Throws:
    
    StandardException

Class GenericLanguageFactory

Field Summary

Fields inherited from interface org.apache.derby.iapi.sql.LanguageFactory

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

emptySet

Constructor Detail

GenericLanguageFactory

Method Detail

boot

stop

newParameterValueSet

getResultDescription

getResultDescription

findServiceModule