org.apache.torque.generator.source
Class SourceProvider

java.lang.Object
  org.apache.torque.generator.source.SourceProvider

All Implemented Interfaces:

Iterator<Source>

Direct Known Subclasses:

FileSourceProvider, JdbcMetadataSourceProvider

public abstract class SourceProvider
extends Object
implements Iterator<Source>

The input for a generation process. It can contain several sources. In order to use the sources, the init() method must be called. After this method was called, no more setters may be called.

Constructor Summary

SourceProvider()

Method Summary

abstract SourceProvider	copy() Returns a copy of this source provider in its initial state.
abstract void	copyNotSetSettingsFrom(SourceProvider sourceProvider) Copies settings which are not set in this source provider from another source provider.
void	init(ConfigurationHandlers configurationHandlers, ControllerState controllerState) Initializes the source provider.
protected abstract void	initInternal(ConfigurationHandlers configurationHandlers, ControllerState controllerState) Initializes the sources provided by this SourceProvider.
boolean	isInit() Returns whether init() was already called.
void	reset(ConfigurationHandlers configurationHandlers, ControllerState controllerState) Resets the source provider.
protected abstract void	resetInternal(ConfigurationHandlers configurationHandlers, ControllerState controllerState) Resets the sources provided by this SourceProvider.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Constructor Detail

SourceProvider

public SourceProvider()

Method Detail

init

public final void init(ConfigurationHandlers configurationHandlers,
                       ControllerState controllerState)
                throws ConfigurationException

Initializes the source provider. Must be called before hasNext() or next() is invoked.

Parameters:

configurationHandlers - the configuration handlers, not null.

controllerState - the current controller state, not null.

Throws:

ConfigurationException - if initializing fails.

reset

public final void reset(ConfigurationHandlers configurationHandlers,
                        ControllerState controllerState)
                 throws ConfigurationException

Resets the source provider. After this method is called, init() must be called again.

Parameters:

configurationHandlers - the configuration handlers, not null.

controllerState - the current controller state, not null.

Throws:

ConfigurationException - if resetting fails.

initInternal

protected abstract void initInternal(ConfigurationHandlers configurationHandlers,
                                     ControllerState controllerState)
                              throws ConfigurationException

Initializes the sources provided by this SourceProvider.

Parameters:

configurationHandlers - the configuration handlers, not null.

controllerState - the current controller state, not null.

Throws:

ConfigurationException - if initializing fails.

resetInternal

protected abstract void resetInternal(ConfigurationHandlers configurationHandlers,
                                      ControllerState controllerState)
                               throws ConfigurationException

Resets the sources provided by this SourceProvider.

Parameters:

configurationHandlers - the configuration handlers, not null.

controllerState - the current controller state, not null.

Throws:

ConfigurationException - if resetting fails.

isInit

public boolean isInit()

Returns whether init() was already called.

Returns:

true if init() was already called, false otherwise.

copy

public abstract SourceProvider copy()
                             throws ConfigurationException

Returns a copy of this source provider in its initial state. This means the init(ConfigurationHandlers, ControllerState) method of the new source provider must be called before it can be used.

Throws:

ConfigurationException - if the new SourceProvider cannot be initialized.

copyNotSetSettingsFrom

public abstract void copyNotSetSettingsFrom(SourceProvider sourceProvider)

Copies settings which are not set in this source provider from another source provider. This only works if the type of the other source provider is known to this source provider. Only a subset of all properties are typically used for overwriting. No Properties which are already set are overwritten.

Parameters:

sourceProvider - the source provoder to copy the settings from.