can we trigger a workflow by clicking a custom action?

<objecttype class="wt.part.WTPart"
		name="xxx"
		resourceBundle="xxxxRB">
		<action name="xxxx">
			<command
				class="class Path"
				method="custStartProcess"
				onClick="JCAConfirm(event,'xxxRB.PRPCESS_START')" />
			<includeFilter name="xxxFilter" />
		</action>
	</objecttype>

public static FormResult custStartProcess(NmCommandBean commanBean) throws WTException, WTPropertyVetoException {
	FormResult result = new FormResult();
	NmOid primaryOid = commanBean.getActionOid();
	Object per = primaryOid.getRefObject();
	if (per instanceof WTPart) {
		WTPart part = (WTPart) per;
		WfProcess process = null;
		if (WorkInProgressHelper.isCheckedOut((Workable) part)) {
			throw new WTException("Please check in first");
		}
		QueryResult qrProcs = WfEngineHelper.service.getAssociatedProcesses(part, WfState.OPEN_RUNNING, null);
		while (qrProcs.hasMoreElements()) {
			process = (WfProcess) qrProcs.nextElement();
			if ("xxxx".equals(process.getName())) {// xxxx WorkFlowTemaplateName
				if (WfState.OPEN_RUNNING.equals(process.getState())) {
					throw new WTException("There is a process that has been started for the current object");
				}
			}
		}
		startProcess(part, "xxxx");
		FeedbackMessage msg = new FeedbackMessage(FeedbackType.SUCCESS, Locale.ENGLISH, "Start Process", null,
				"Start Process Success");
		msg.addOidIdentityPair(part, Locale.ENGLISH);
		result.addFeedbackMessage(msg);
		result.setStatus(FormProcessingStatus.SUCCESS);
	}
	return result;
}

private static void startProcess(WTObject object, String workFlowName) throws WTException, WTPropertyVetoException {
 if (object instanceof WTPart) {
 WTPart part = (WTPart) object;
 WTContainerRef wtContainerRef = part.getContainerReference();
 TeamReference teamReference = part.getTeamId();
 WfProcessDefinition processDefinition = WfDefinerHelper.service.getProcessDefinition(workFlowName,
 wtContainerRef);
 WfProcess wfprocess = WfEngineHelper.service.createProcess(processDefinition, teamReference,
 wtContainerRef);
 WTPrincipal principal = SessionHelper.manager.getPrincipal();
 WTPrincipalReference reference = WTPrincipalReference.newWTPrincipalReference(principal);
 wfprocess.setCreator(reference);
 ProcessData processData = wfprocess.getContext();
 processData.setValue("primaryBusinessObject", part);
 WfEngineHelper.service.startProcessImmediate(wfprocess, processData, 0);
 }
}