org.jpc.engine.embedded

Class JpcEngineDriver

java.lang.Object

org.jpc.engine.prolog.driver.AbstractPrologEngineDriver<JpcEngine>

org.jpc.engine.embedded.JpcEngineDriver

All Implemented Interfaces:

PrologEngineDriver<JpcEngine>, PrologEngineFactory<JpcEngine>

public class JpcEngineDriver
extends AbstractPrologEngineDriver<JpcEngine>

Field Summary

Fields inherited from class org.jpc.engine.prolog.driver.AbstractPrologEngineDriver

JAVA_SIDE_EXCEPTION_SPECIFIER

Constructor Summary

Constructors

Constructor and Description
JpcEngineDriver()

Method Summary

Modifier and Type	Method and Description
protected PrologEngineFactory<JpcEngine>	defaultBasicFactory()
String	getLibraryName()
boolean	isDisabled() Answers if the driver is disabled (cannot create a Prolog Engine session) or enabled.

Methods inherited from class org.jpc.engine.prolog.driver.AbstractPrologEngineDriver

addStateListener, createPrologEngine, createPrologEngine, getDescription, getEngineDescription, getLicenseUrl, getListeners, getPreferences, getShortDescription, getSiteUrl, notifyDisabledState, onCreate, readyOrThrow, removeStateListener, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

JpcEngineDriver

public JpcEngineDriver()

Method Detail

defaultBasicFactory

protected PrologEngineFactory<JpcEngine> defaultBasicFactory()

Specified by:

defaultBasicFactory in class AbstractPrologEngineDriver<JpcEngine>

getLibraryName

public String getLibraryName()

Specified by:

getLibraryName in interface PrologEngineDriver<JpcEngine>

Specified by:

getLibraryName in class AbstractPrologEngineDriver<JpcEngine>

isDisabled

public boolean isDisabled()

Description copied from class: AbstractPrologEngineDriver

Answers if the driver is disabled (cannot create a Prolog Engine session) or enabled. Normally this property cannot be set by the programmer but depends on the internals of the concrete driver implementation (that is the reason is not implemented as an instance variable). The original motivation of this property is to enable GUI tools to show properly the driver description and availability on the screen Normally, drivers supporting multiple Prolog engines are always enable. However, drivers supporting only one Prolog session are enabled only before creating the first (and unique) Prolog session, and disabled afterwards. Note that certain libraries (e.g., JPL) allows only one session using the library, so it is not possible to start a second session with a different Prolog engine that uses the same library. For example, if a SWI Prolog engine is created using JPL, it is not going to be possible to create a YAP Prolog engine using also JPL.

Specified by:

isDisabled in interface PrologEngineDriver<JpcEngine>

Overrides:

isDisabled in class AbstractPrologEngineDriver<JpcEngine>

Returns:

the disabled state of the driver