Hibernate @Formula throws nullPointerException -

i trying use @formula anontation in hibernate. code:

@formula (value = "(select top(1) race_data.credits race_data race_data.player_id = id order race_data.race_id desc)") private integer credits; 

i tried same sql query in sql server , returns credits race_data not in integer object on model.

error:

<b>exception</b>             <pre>org.springframework.web.util.nestedservletexception: request processing failed; nested exception java.lang.nullpointerexception org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:894) org.springframework.web.servlet.frameworkservlet.dopost(frameworkservlet.java:789) javax.servlet.http.httpservlet.service(httpservlet.java:647) javax.servlet.http.httpservlet.service(httpservlet.java:728) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:330) org.springframework.security.web.access.intercept.filtersecurityinterceptor.invoke(filtersecurityinterceptor.java:118) org.springframework.security.web.access.intercept.filtersecurityinterceptor.dofilter(filtersecurityinterceptor.java:84) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.access.exceptiontranslationfilter.dofilter(exceptiontranslationfilter.java:113) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.session.sessionmanagementfilter.dofilter(sessionmanagementfilter.java:103) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.anonymousauthenticationfilter.dofilter(anonymousauthenticationfilter.java:113) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.servletapi.securitycontextholderawarerequestfilter.dofilter(securitycontextholderawarerequestfilter.java:54) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.savedrequest.requestcacheawarefilter.dofilter(requestcacheawarefilter.java:45) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.www.basicauthenticationfilter.dofilter(basicauthenticationfilter.java:150) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.abstractauthenticationprocessingfilter.dofilter(abstractauthenticationprocessingfilter.java:183) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.logout.logoutfilter.dofilter(logoutfilter.java:105) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.context.securitycontextpersistencefilter.dofilter(securitycontextpersistencefilter.java:87) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.filterchainproxy.dofilterinternal(filterchainproxy.java:192) org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:160) org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:346) org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:259)