org.eclipse.incquery.runtime.extensibility

Class QueryBackendRegistry

java.lang.Object

org.eclipse.incquery.runtime.extensibility.QueryBackendRegistry

public class QueryBackendRegistry
extends java.lang.Object

A registry component for storing all known query backend factories.

Since:

0.9

Author:

Zoltan Ujhelyi

Method Summary

Modifier and Type	Method and Description
java.lang.Iterable<java.util.Map.Entry<java.lang.Class<? extends IQueryBackend>,IQueryBackendFactory>>	getAllKnownFactories() Returns all known factory instances in an iterable object
java.lang.Class<? extends IQueryBackend>	getDefaultBackendClass()
java.lang.Class<? extends IQueryBackend>	getDefaultCachingBackendClass()
IQueryBackendFactory	getFactory(java.lang.Class<? extends IQueryBackend> backend) Returns a factory for the selected backend class.
static QueryBackendRegistry	getInstance() Returns the singleton instanceof of the backend registry
void	registerQueryBackendFactory(java.lang.Class<? extends IQueryBackend> backend, IQueryBackendFactory factory) Registers a factory instance for a backend class.
void	registerQueryBackendFactoryUnchecked(java.lang.Class<? extends IQueryBackend> backend, IQueryBackendFactory factory) Registers a factory instance for a backend class if no class is already registered

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static QueryBackendRegistry getInstance()

Returns the singleton instanceof of the backend registry

getDefaultBackendClass

public java.lang.Class<? extends IQueryBackend> getDefaultBackendClass()

Returns:

the default backend

getDefaultCachingBackendClass

public java.lang.Class<? extends IQueryBackend> getDefaultCachingBackendClass()

Returns:

the default caching backend, if a caching backend is explicitly requested

registerQueryBackendFactory

public void registerQueryBackendFactory(java.lang.Class<? extends IQueryBackend> backend,
                                        IQueryBackendFactory factory)

Registers a factory instance for a backend class.

Throws:

java.lang.IllegalStateException - if a factory is already registered for the selected backend

registerQueryBackendFactoryUnchecked

public void registerQueryBackendFactoryUnchecked(java.lang.Class<? extends IQueryBackend> backend,
                                                 IQueryBackendFactory factory)

Registers a factory instance for a backend class if no class is already registered

Throws:

java.lang.IllegalStateException - if a factory is already registered for the selected backend

Since:

1.0

getFactory

public IQueryBackendFactory getFactory(java.lang.Class<? extends IQueryBackend> backend)

Returns a factory for the selected backend class. If no factories are available for the selected backend, an exception is thrown.

Parameters:

backend -

Throws:

java.lang.IllegalStateException - if no corresponding backend is registered into the factory

getAllKnownFactories

public java.lang.Iterable<java.util.Map.Entry<java.lang.Class<? extends IQueryBackend>,IQueryBackendFactory>> getAllKnownFactories()

Returns all known factory instances in an iterable object