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import com.sun.star.lang.XSingleServiceFactory;
import com.sun.star.lang.XServiceInfo;
import com.sun.star.lang.XInitialization;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.beans.XPropertySet;
import com.sun.star.uno.XInterface;
import com.sun.star.uno.Any;
import com.sun.star.uno.UnoRuntime;
import java.lang.reflect.Constructor;
//
// purpose of this class is to provide a service factory that instantiates
// the services only once (as long as this factory itself exists)
// and returns only reference to that instance.
//
public class OneInstanceFactory implements
XSingleServiceFactory,
XServiceInfo
{
Class aMyClass;
String aSvcImplName;
String[] aSupportedSvcNames;
XInterface xInstantiatedService;
XMultiServiceFactory xMultiFactory;
public OneInstanceFactory(
Class aMyClass,
String aSvcImplName,
String[] aSupportedSvcNames,
XMultiServiceFactory xMultiFactory )
{
this.aMyClass = aMyClass;
this.aSvcImplName = aSvcImplName;
this.aSupportedSvcNames = aSupportedSvcNames;
this.xMultiFactory = xMultiFactory;
xInstantiatedService = null;
}
//**********************
// XSingleServiceFactory
//**********************
public Object createInstance()
throws com.sun.star.uno.Exception,
com.sun.star.uno.RuntimeException
{
if (xInstantiatedService == null)
{
//!! the here used services all have exact one constructor!!
Constructor [] aCtor = aMyClass.getConstructors();
try {
xInstantiatedService = (XInterface) aCtor[0].newInstance( (Object[])null );
}
catch( Exception e ) {
}
//!! workaround for services not always being created
//!! via 'createInstanceWithArguments'
XInitialization xIni = (XInitialization) UnoRuntime.queryInterface(
XInitialization.class, createInstance());
if (xIni != null)
{
Object[] aArguments = new Object[]{ null, null };
if (xMultiFactory != null)
{
XPropertySet xPropSet = (XPropertySet) UnoRuntime.queryInterface(
XPropertySet.class , xMultiFactory.createInstance(
"com.sun.star.linguistic2.LinguProperties" ) );
aArguments[0] = xPropSet;
}
xIni.initialize( aArguments );
}
}
return xInstantiatedService;
}
public Object createInstanceWithArguments( Object[] aArguments )
throws com.sun.star.uno.Exception,
com.sun.star.uno.RuntimeException
{
if (xInstantiatedService == null)
{
XInitialization xIni = (XInitialization) UnoRuntime.queryInterface(
XInitialization.class, createInstance());
if (xIni != null)
xIni.initialize( aArguments );
}
return xInstantiatedService;
}
//*************
// XServiceInfo
//*************
public boolean supportsService( String aServiceName )
throws com.sun.star.uno.RuntimeException
{
boolean bFound = false;
int nCnt = aSupportedSvcNames.length;
for (int i = 0; i < nCnt && !bFound; ++i)
{
if (aServiceName.equals( aSupportedSvcNames[i] ))
bFound = true;
}
return bFound;
}
public String getImplementationName()
throws com.sun.star.uno.RuntimeException
{
return aSvcImplName;
}
public String[] getSupportedServiceNames()
throws com.sun.star.uno.RuntimeException
{
return aSupportedSvcNames;
}
};