org.gvsig.fmap.dal
Interface DataManager

public interface DataManager

There are two top level management roles within DAL: data access and resource management. This class is responsible of the data access management role. It provides ways for registering and instantiating DataServerExplorer(s), DataStore(s), Evaluator(s) and FeatureIndex(es).

See Also:

ResourceManager

Method Summary

DynObject	createCacheParameters(String name) Returns an instance of DataServerExplorerParameters corresponding to the given name used by the cache to create a store to save the retrieved data.
Evaluator	createExpresion(String expression) Creates an instance of Evaluator that represents the given expression.
FeatureAttributeGetter	createFeatureAttributeGetter(String name) Creates a FeatureAttributeGetter by name.
FeaturePagingHelper	createFeaturePagingHelper(FeatureStore featureStore, FeatureQuery featureQuery, int pageSize) Creates a FeaturePagingHelper to paginate data from a FeatureStore.
FeaturePagingHelper	createFeaturePagingHelper(FeatureStore featureStore, int pageSize) Creates a FeaturePagingHelper to paginate data from a FeatureStore.
EditableFeatureType	createFeatureType()
FeatureStore	createMemoryStore(String autoOrderAttributeName) Utility method to create the a FeatureStore based on the MemoryStoreProvider.
DataStoreParameters	createMemoryStoreParameters(String autoOrderAttributeName) Utility method to create the DataStoreParameters to create a FeatureStore based on the MemoryStoreProvider.
NewDataStoreParameters	createNewStoreParameters(String explorer, String provider) Creates, initializes and returns an instance of NewDataStoreParameters given the name with which their provider is registered.
DataServerExplorer	createServerExplorer(DataServerExplorerParameters parameters) Deprecated. see openServerExplorer
DataServerExplorerParameters	createServerExplorerParameters(String name) Returns an instance of DataServerExplorerParameters corresponding to the given name.
DataStore	createStore(DataStoreParameters parameters) Deprecated. see openStore
DataStoreParameters	createStoreParameters(String name) Creates, initializes and returns an instance of DataStoreParameters given the name with which their provider is registered.
List	getDataTypes()
String	getDefaultFeatureIndexProviderName(int dataType) Returns the default DataIndexProvider name, given a data type.
List	getExplorerProviders() Returns a list of String containing the names of the available DataServerExplorer providers.
List	getFeatureCacheProviders() Returns a list of String containing the names of the available cache providers.
List	getFeatureIndexProviders() Returns a list of String containing the names of the available index providers.
DataStoreProviderFactory	getStoreProviderFactory(String name)
List	getStoreProviders() Returns a list of Strings containing the names of all available DataStore providers.
List	getStoreProviders(String name) Returns a list of Strings containing the names of all available DataStore providers for an explorer.
String	getTemporaryDirectory() Returns the default DAL's temporary directory
void	newStore(String explorer, String provider, NewDataStoreParameters parameters, boolean overwrite) Create a new physical store
DataServerExplorer	openServerExplorer(String name, DataServerExplorerParameters parameters) Returns an instance of DataServerExplorer given its parameters.
DataStore	openStore(String provider, DataStoreParameters parameters) Creates, initializes and returns an instance of DataStore given the DataStoreParameters.
void	registerDefaultEvaluator(Class evaluator) Registers the default expression evaluator.
void	registerFeatureAttributeGetter(String name, Class clazz) Registers a class that can be used to create a FeatureAttributeGetter and associate it to a FeatureAttributeDescriptor.
void	setDefaultFeatureIndexProviderName(int dataType, String name) Sets the default DataIndexProvider for the given data type.
void	setOpenErrorHandler(OpenErrorHandler handler)

Method Detail

getTemporaryDirectory

String getTemporaryDirectory()

Returns the default DAL's temporary directory

Returns:

Temporary directory name

createStoreParameters

DataStoreParameters createStoreParameters(String name)
                                          throws InitializeException,
                                                 ProviderNotRegisteredException

Creates, initializes and returns an instance of DataStoreParameters given the name with which their provider is registered.

Parameters:

name - provider name

Throws:

ProviderNotRegisteredException - if the memory provider is not registered

InitializeException - if there is an error initializing the parameters for the memory provider

createNewStoreParameters

NewDataStoreParameters createNewStoreParameters(String explorer,
                                                String provider)
                                                throws InitializeException,
                                                       ProviderNotRegisteredException

Creates, initializes and returns an instance of NewDataStoreParameters given the name with which their provider is registered.

Parameters:

name -

Throws:

InitializeException

ProviderNotRegisteredException

openStore

DataStore openStore(String provider,
                    DataStoreParameters parameters)
                    throws InitializeException,
                           ProviderNotRegisteredException,
                           ValidateDataParametersException

Creates, initializes and returns an instance of DataStore given the DataStoreParameters.

Parameters:

parameters - parameters used to instantiate and initialize the DataStore

Throws:

ProviderNotRegisteredException - if the memory provider is not registered

InitializeException - if there is an error initializing the parameters for the memory provider

ValidateDataParametersException - if the parameters to open the memory based store are not valid

createStore

DataStore createStore(DataStoreParameters parameters)
                      throws InitializeException,
                             ProviderNotRegisteredException,
                             ValidateDataParametersException

Deprecated. see openStore

Throws:

InitializeException

ProviderNotRegisteredException

ValidateDataParametersException

newStore

void newStore(String explorer,
              String provider,
              NewDataStoreParameters parameters,
              boolean overwrite)
              throws InitializeException,
                     ProviderNotRegisteredException,
                     ValidateDataParametersException

Create a new physical store

Parameters:

parameters -

Throws:

InitializeException

ProviderNotRegisteredException

ValidateDataParametersException

getStoreProviders

List getStoreProviders()

Returns a list of Strings containing the names of all available DataStore providers.

Returns:

list of String containing available DataStore provider names

getStoreProviders

List getStoreProviders(String name)

Returns a list of Strings containing the names of all available DataStore providers for an explorer.

Parameters:

explorer - name

createServerExplorerParameters

DataServerExplorerParameters createServerExplorerParameters(String name)
                                                            throws InitializeException,
                                                                   ProviderNotRegisteredException

Returns an instance of DataServerExplorerParameters corresponding to the given name.

Parameters:

name - name of a registered server explorer provider

Throws:

InitializeException - if parameter initialization causes an error.

ProviderNotRegisteredException - if could not find a provider by the given name.

openServerExplorer

DataServerExplorer openServerExplorer(String name,
                                      DataServerExplorerParameters parameters)
                                      throws InitializeException,
                                             ProviderNotRegisteredException,
                                             ValidateDataParametersException

Returns an instance of DataServerExplorer given its parameters.

Parameters:

parameters - parameters used to instantiate and initialize the DataServerExplorer.

Returns:

an instance of DataServerExplorer.

Throws:

InitializeException

ProviderNotRegisteredException

ValidateDataParametersException

createServerExplorer

DataServerExplorer createServerExplorer(DataServerExplorerParameters parameters)
                                        throws InitializeException,
                                               ProviderNotRegisteredException,
                                               ValidateDataParametersException

Deprecated. see openServerExplorer

Throws:

InitializeException

ProviderNotRegisteredException

ValidateDataParametersException

getExplorerProviders

List getExplorerProviders()

Returns a list of String containing the names of the available DataServerExplorer providers.

Returns:

list of String containing the names of the available DataServerExplorer providers.

registerDefaultEvaluator

void registerDefaultEvaluator(Class evaluator)

Registers the default expression evaluator. It is used by DAL to evaluate and resolve query filters and expressions.

Parameters:

evaluator - Class that will be called to evaluate the expression. It must implement Evaluator.

createExpresion

Evaluator createExpresion(String expression)
                          throws InitializeException

Creates an instance of Evaluator that represents the given expression.

Parameters:

expression - String containing a CQL expression.

Returns:

instance of Evaluator representing the given expression.

Throws:

InitializeException

getFeatureIndexProviders

List getFeatureIndexProviders()

Returns a list of String containing the names of the available index providers.

Returns:

list of strings with the names of the available index providers

setDefaultFeatureIndexProviderName

void setDefaultFeatureIndexProviderName(int dataType,
                                        String name)

Sets the default DataIndexProvider for the given data type.

Parameters:

dataType - one of the data types defined in DataTypes.

name - Provider's name

getDefaultFeatureIndexProviderName

String getDefaultFeatureIndexProviderName(int dataType)

Returns the default DataIndexProvider name, given a data type. Data types are defined in DataTypes.

Parameters:

dataType - one of the constants in DataTypes.

Returns:

the name of the default FeatureIndexProvider if there is anyone available for the given data type.

getFeatureCacheProviders

List getFeatureCacheProviders()

Returns a list of String containing the names of the available cache providers.

Returns:

list of strings with the names of the available cache providers

createCacheParameters

DynObject createCacheParameters(String name)
                                throws InitializeException,
                                       ProviderNotRegisteredException

Returns an instance of DataServerExplorerParameters corresponding to the given name used by the cache to create a store to save the retrieved data.

Parameters:

name - name of a registered feature cache provider

Throws:

InitializeException - if parameter initialization causes an error.

ProviderNotRegisteredException - if could not find a cache provider by the given name.

createMemoryStoreParameters

DataStoreParameters createMemoryStoreParameters(String autoOrderAttributeName)
                                                throws InitializeException

Utility method to create the DataStoreParameters to create a FeatureStore based on the MemoryStoreProvider.

Parameters:

autoOrderAttributeName - the name of the Feature attribute to be used to order the store Features by default. Set to null if you don't want any order by default

Returns:

the parameters for the memory based store

Throws:

InitializeException - if there is an error initializing the parameters for the memory provider

createMemoryStore

FeatureStore createMemoryStore(String autoOrderAttributeName)
                               throws InitializeException

Utility method to create the a FeatureStore based on the MemoryStoreProvider.

Parameters:

autoOrderAttributeName - the name of the Feature attribute to be used to order the store Features by default. Set to null if you don't want any order by default

Returns:

the the memory based store

Throws:

InitializeException - if there is an error initializing the parameters for the memory provider

createFeaturePagingHelper

FeaturePagingHelper createFeaturePagingHelper(FeatureStore featureStore,
                                              int pageSize)
                                              throws BaseException

Creates a FeaturePagingHelper to paginate data from a FeatureStore.

Parameters:

featureStore - to get the Features from

pageSize - the page size

Returns:

a FeaturePagingHelper

Throws:

BaseException - if there is an error creating the helper

createFeaturePagingHelper

FeaturePagingHelper createFeaturePagingHelper(FeatureStore featureStore,
                                              FeatureQuery featureQuery,
                                              int pageSize)
                                              throws BaseException

Creates a FeaturePagingHelper to paginate data from a FeatureStore.

Parameters:

featureStore - to get the Features from

featureQuery - to filter and/or order the data

pageSize - the page size

Returns:

a FeaturePagingHelper

Throws:

BaseException - if there is an error creating the helper

setOpenErrorHandler

void setOpenErrorHandler(OpenErrorHandler handler)

getStoreProviderFactory

DataStoreProviderFactory getStoreProviderFactory(String name)

createFeatureType

EditableFeatureType createFeatureType()

getDataTypes

List getDataTypes()

registerFeatureAttributeGetter

void registerFeatureAttributeGetter(String name,
                                    Class clazz)

Registers a class that can be used to create a FeatureAttributeGetter and associate it to a FeatureAttributeDescriptor.

Parameters:

name - the name used to register the class.

clazz - it has to be an instance of FeatureAttributeDescriptor

createFeatureAttributeGetter

FeatureAttributeGetter createFeatureAttributeGetter(String name)
                                                    throws InitializeException

Creates a FeatureAttributeGetter by name. If there is not any class registered with this name or if there is any error an exception is thrown.

Parameters:

name - the name that was used to register the class

Returns:

a FeatureAttributeGetter

Throws:

InitializeException - if there is any error creating the object