org.drools.smf
Class DefaultSemanticsRepository

java.lang.Object
  org.drools.smf.DefaultSemanticsRepository

All Implemented Interfaces:

SemanticsRepository

public final class DefaultSemanticsRepository
extends java.lang.Object
implements SemanticsRepository

Default SemanticsRepository which uses discovery to autoload semantic modules.

Any semantic module that conforms to the SMF contract will be discovered and autoloaded upon first access of the DefaultSemanticsRepository.

To be discovered, the module should be in a jar with a module descriptor located at /META-INF/drools-semantics.properties.

Method Summary

static SemanticsRepository	getInstance() Retrieve the singleton instance.
java.lang.ClassLoader	getSemanticModuleClassLoader() Gets the classloader that was chosen when the repository was initialised.
SemanticModule[]	getSemanticModules() Retieve all SemanticModules.
protected void	init() Initialize and perform discovery.
protected void	loadConfig(java.lang.String path)
protected void	loadConfig(java.net.URL url)
protected void	loadSemantics(java.lang.String semanticsName)
SemanticModule	lookupSemanticModule(java.lang.String uri) Lookup a SemanticModule by URI.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static SemanticsRepository getInstance()
                                       throws java.io.IOException,
                                              SemanticsReaderException

Retrieve the singleton instance.

Returns:

The singleton instance.

Throws:

java.lang.Exception - If an error occurs while performing discovery and loading of the semantic modules.

java.io.IOException

SemanticsReaderException

init

protected void init()
             throws java.io.IOException,
                    SemanticsReaderException

Initialize and perform discovery.

Throws:

java.lang.Exception - If an error occurs while performing discovery and loading of the semantic modules.

java.io.IOException

SemanticsReaderException

loadConfig

protected void loadConfig(java.lang.String path)
                   throws java.io.IOException,
                          SemanticsReaderException

Throws:

java.io.IOException

SemanticsReaderException

loadConfig

protected void loadConfig(java.net.URL url)
                   throws java.io.IOException,
                          SemanticsReaderException

Throws:

java.io.IOException

SemanticsReaderException

loadSemantics

protected void loadSemantics(java.lang.String semanticsName)
                      throws java.io.IOException,
                             SemanticsReaderException

Throws:

java.io.IOException

SemanticsReaderException

lookupSemanticModule

public SemanticModule lookupSemanticModule(java.lang.String uri)
                                    throws NoSuchSemanticModuleException

Description copied from interface: SemanticsRepository

Lookup a SemanticModule by URI.

Specified by:

lookupSemanticModule in interface SemanticsRepository

Parameters:

uri - The URI.

Returns:

The bound SemanticModule.

Throws:

NoSuchSemanticModuleException - If no module is bound to the URI.

See Also:

SemanticsRepository

getSemanticModules

public SemanticModule[] getSemanticModules()

Description copied from interface: SemanticsRepository

Retieve all SemanticModules.

Specified by:

getSemanticModules in interface SemanticsRepository

Returns:

All semantic modules.

See Also:

SemanticsRepository

getSemanticModuleClassLoader

public java.lang.ClassLoader getSemanticModuleClassLoader()

Gets the classloader that was chosen when the repository was initialised. Each time this is called, it will get a valid classloader. This does not cache the classloader, so as to support "hot deployment" environments/containers.

Specified by:

getSemanticModuleClassLoader in interface SemanticsRepository