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/*******************************************************************************
* Copyright (c) 1997-2011 by ProSyst Software GmbH
* http://www.prosyst.com
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* ProSyst Software GmbH - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.ds.impl;
import java.util.*;
import org.apache.felix.scr.Component;
import org.eclipse.equinox.internal.ds.*;
import org.eclipse.equinox.internal.ds.model.ServiceComponentProp;
import org.osgi.service.component.*;
import org.osgi.service.log.LogService;
/**
* ComponentFactoryImpl.java
*
* @author Valentin Valchev
* @author Stoyan Boshev
* @author Pavlin Dobrev
*/
public class ComponentFactoryImpl implements ComponentFactory {
private ServiceComponentProp sci;
/**
* ComponentFactoryImpl
*
* @param component
* the ComponentDescription Object with Properties
*/
public ComponentFactoryImpl(ServiceComponentProp component) {
this.sci = component;
}
/**
* Create a new instance of the component. Additional properties may be
* provided for the component instance.
*
* @param additionalProps
* Additional properties for the component instance.
* @return A ComponentInstance object encapsulating the component instance.
* The returned component instance has been activated.
*/
public ComponentInstance newInstance(Dictionary additionalProps) {
ComponentInstanceImpl instance = null;
ServiceComponentProp newSCP = null;
try {
if (Activator.DEBUG) {
Activator.log.debug("ComponentFactoryImpl.newInstance(): " + sci.name, null); //$NON-NLS-1$
}
// merge properties
Hashtable props = new Hashtable((Map) sci.getProperties());
SCRUtil.copyTo(props, additionalProps);
// create a new SCP (adds to resolver scpEnabled list)
newSCP = InstanceProcess.resolver.mapNewFactoryComponent(sci.serviceComponent, props);
// register the component and make instance if immediate
Vector toBuild = new Vector(1);
toBuild.addElement(newSCP);
InstanceProcess.staticRef.buildComponents(toBuild, Activator.security);
if (!newSCP.instances.isEmpty()) {
// an instance was built because the component is either
// immediate
// or someone has got it as service (if provides one)
instance = (ComponentInstanceImpl) newSCP.instances.firstElement();
}
if (instance == null && !newSCP.isImmediate()) {
// finally build an instance if not done yet
instance = InstanceProcess.staticRef.buildComponent(null, newSCP, null, Activator.security);
}
if (instance == null) {
//the instance could not be build because the component cannot be activated
//throw exception to notify the user
throw new ComponentException(Messages.COULD_NOT_CREATE_NEW_INSTANCE);
}
} catch (Throwable e) {
//remove the component configuration
if (newSCP != null) {
disposeSCP(newSCP);
}
if (e instanceof ComponentException) {
throw (ComponentException) e;
}
Activator.log(null, LogService.LOG_ERROR, "ComponentFactoryImpl.newInstance(): failed for " + sci.name + " with properties " + additionalProps, e); //$NON-NLS-1$ //$NON-NLS-2$
throw new ComponentException(Messages.COULD_NOT_CREATE_NEW_INSTANCE, e);
}
return instance;
}
private void disposeSCP(ServiceComponentProp scp) {
scp.serviceComponent.componentProps.removeElement(scp);
Vector toDispose = new Vector(1);
toDispose.addElement(scp);
InstanceProcess.resolver.disposeComponentConfigs(toDispose, ComponentConstants.DEACTIVATION_REASON_UNSPECIFIED);
scp.setState(Component.STATE_DISPOSED);
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
public String toString() {
return "ComponentFactory for " + sci.name; //$NON-NLS-1$
}
}
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