Jira plugin development how to get RapidViewServiceImpl instance

I am developing a Jira report plugin using Java and I need to get an instance of RapidViewServiceImpl class.
If I use the constructor I get a nullPtrException and I think there is another way to get this instance.
For example I had exactly the same problem with SprintManager and SprintManagerImpl, and I get the instance as the following:

private com.atlassian.greenhopper.service.sprint.SprintManager getSprintManager() throws InvalidSyntaxException {   
ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
if (appCtx != null) {
return (com.atlassian.greenhopper.service.sprint.SprintManager) appCtx.getBean("sprintManagerImpl");
}
return null;
}
private Object getGreenHopperAppCtx() throws InvalidSyntaxException {
OsgiContainerManager osgi = ComponentAccessor.getComponentOfType(OsgiContainerManager.class);
if (osgi == null) {
java.lang.System.out.println("OSGI Not Found");
return null;
}    
Bundle[] bundles = osgi.getBundles();        
for (int i = 0; i < bundles.length; i++) {
Bundle bundle = bundles[i];    
if ("com.pyxis.greenhopper.jira".equals(bundle.getSymbolicName())) {
BundleContext bctx = bundle.getBundleContext();
ServiceReference[] refs = bctx.getAllServiceReferences(null, null);
if (refs != null) {
for (int j = 0; j < refs.length; j++) {
Object prop = refs[j].getProperty("org.springframework.context.service.name");
if ("com.pyxis.greenhopper.jira".equals(prop)) {
return bctx.getService(refs[j]);
}
}
}
}
}
return null;
}

And in the main function I called SprintManager spManager = getSprintManager().
I tried the same thing with RapidViewServiceImpl:

private Object getGreenHopperAppCtx() throws InvalidSyntaxException {
OsgiContainerManager osgi = ComponentAccessor.getComponentOfType(OsgiContainerManager.class);
if (osgi == null) {
java.lang.System.out.println("OSGI Not Found");
return null;
}    
Bundle[] bundles = osgi.getBundles();        
for (int i = 0; i < bundles.length; i++) {
Bundle bundle = bundles[i];    
if ("com.pyxis.greenhopper.jira".equals(bundle.getSymbolicName())) {
BundleContext bctx = bundle.getBundleContext();
ServiceReference[] refs = bctx.getAllServiceReferences(null, null);
if (refs != null) {
for (int j = 0; j < refs.length; j++) {
Object prop = refs[j].getProperty("org.springframework.context.service.name");
if ("com.pyxis.greenhopper.jira".equals(prop)) {
return bctx.getService(refs[j]);
}    
}
}
}
}
return null;
}    
//------------------------------------------------------------------------------------------------------------------
private com.atlassian.greenhopper.service.rapid.view.RapidViewService getRapidViewManager() throws InvalidSyntaxException {    
ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
if (appCtx != null) {
return (RapidViewService) appCtx.getBean("rapidViewService");
}
return null;
}

But I get an error which says there is no bundle named "rapidViewService".
This is a part of the error, I can't post the entire error because is too long:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'rapidViewService' is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:698) [spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1175) [spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284) [spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) [spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054) [spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at com.jiraPlugin.utility.SprintManager.getRapidViewManager(SprintManager.java:72) [?:?]
at com.jiraPlugin.utility.SprintManager.getListOfSprints(SprintManager.java:95) [?:?]
at com.jiraPlugin.utility.GetSprintsForUI.getValues(GetSprintsForUI.java:35) [?:?]
at com.atlassian.configurable.ValuesGeneratorObjectConfigurationProperty.getInternalValues(ValuesGeneratorObjectConfigurationProperty.java:75) [classes/:?]
at com.atlassian.configurable.ObjectConfigurationPropertyImpl.entrySet(ObjectConfigurationPropertyImpl.java:266) [classes/:?]
at com.atlassian.jira.plugin.corereports.web.action.ConfigureReport.mapAndConvertToList(ConfigureReport.java:383) [?:?]
at com.atlassian.jira.plugin.corereports.web.action.ConfigureReport.access$000(ConfigureReport.java:53) [?:?]
at com.atlassian.jira.plugin.corereports.web.action.ConfigureReport$ObjectConfigurationField.getValues(ConfigureReport.java:440) [?:?]
... 387 more

Can someone please help me to solve this problem?

I solved the problem by using the class ProjectRapidViewServiceImpl, and I got the instance of this class using the bundle named "projectRapidViewServiceImpl"

private com.atlassian.greenhopper.service.rapid.ProjectRapidViewService getRapidViewManager() throws InvalidSyntaxException {    
ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
if (appCtx != null) {
return (ProjectRapidViewServiceImpl) appCtx.getBean("projectRapidViewServiceImpl");
}
return null;
}

And this class has a function named findRapidViewsByProject(com.atlassian.jira.user.ApplicationUser user, com.atlassian.jira.project.Project project) which returns a list of RapidViews related to a project.