Use of PortalClassInvoker in Liferay-Portlet...

Some times we need to use portal-impl classes functionality,but we can't access that in our custom portlet. Hence,we require to PortalClassInvoker class.

for example : we need to access PortalLDAPUtil.getLdapServerId()(method for get LDAP ServerId) in our costum portlet and it's there in portal-impl ,so access is the issue. For that , we use PortalClassInvoker.invoke() (This method have many forms) with MethodKey.

Following are steps to use PortalClassInvoker.invoke() method to access utility of portal-impl class PortalLDAPUtil.

1) Initialize MethodKey object.
   
    Syntax : MethodKey portalLDAPUtilMethodKey = new MethodKey("classNameWithPackagePath", "methodName",argClassType1,argClassType2......);
   
    Example : MethodKey portalLDAPUtilMethodKey = new MethodKey("com.liferay.portal.security.ldap.PortalLDAPUtil", "getLdapServerId",Long.class,String.class);
   
2) Use PortalClassInvoker.invoke() to access portal-impl classes using MethodKey.
    Syntax : PortalClassInvoker.invoke(newInstance, methodKey, argumentList);
   
    Example : Long ldapServerId = (Long) PortalClassInvoker.invoke(false, portalLDAPUtilMethodKey, new Object[] {Long.valueOf(themeDisplay.getCompanyId()),screenName});
here screenName is ldap user screenName. i.e. “ketan.savaliya”.