class java.lang.NumberFormatException : null

java.lang.Long.parseLong(Long.java:375)
java.lang.Long.parseLong(Long.java:468)
jp.dsic.scart3d.logic.cart.impl.ItemInformationLogicImpl.getItemInformation(ItemInformationLogicImpl.java:96)
jp.dsic.scart3d.logic.cart.impl.ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e.getItemInformation$$invokeSuperMethod$$(ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e.java)
jp.dsic.scart3d.logic.cart.impl.ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e$$MethodInvocation$$getItemInformation1.proceed(MethodInvocationClassGenerator.java)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:45)
org.seasar.framework.aop.interceptors.TraceInterceptor.invoke(TraceInterceptor.java:50)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
org.seasar.framework.aop.interceptors.ThrowsInterceptor.invoke(ThrowsInterceptor.java:64)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
org.seasar.framework.aop.interceptors.InterceptorChain.invoke(InterceptorChain.java:42)
jp.dsic.scart3d.logic.cart.impl.ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e$$MethodInvocation$$getItemInformation1.proceed(MethodInvocationClassGenerator.java)
jp.dsic.scart3d.logic.cart.impl.ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e.getItemInformation(ItemInformationLogicImpl$$EnhancedByS2AOP$$136e10e.java)
jp.dsic.scart3d.action.cart.impl.KototokiActionImpl.initialize(KototokiActionImpl.java:173)
jp.dsic.scart3d.action.cart.impl.KototokiActionImpl$$EnhancedByS2AOP$$bed4c8.initialize$$invokeSuperMethod$$(KototokiActionImpl$$EnhancedByS2AOP$$bed4c8.java)
jp.dsic.scart3d.action.cart.impl.KototokiActionImpl$$EnhancedByS2AOP$$bed4c8$$MethodInvocation$$initialize0.proceed(MethodInvocationClassGenerator.java)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:45)
org.seasar.extension.tx.RequiredInterceptor.invoke(RequiredInterceptor.java:40)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
jp.dsic.scart3d.interceptor.AccessLogInterceptor.invoke(AccessLogInterceptor.java:105)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
jp.dsic.scart3d.interceptor.AccessCheckInterceptor.invoke(AccessCheckInterceptor.java:134)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
jp.dsic.scart3d.interceptor.MenuActionInterceptor.invoke(MenuActionInterceptor.java:72)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
jp.dsic.scart3d.interceptor.KeepSessionInterceptor.invoke(KeepSessionInterceptor.java:80)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
jp.dsic.scart3d.interceptor.CorrectUserInfoDtoInterceptor.invoke(CorrectUserInfoDtoInterceptor.java:65)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
org.seasar.framework.aop.interceptors.ThrowsInterceptor.invoke(ThrowsInterceptor.java:64)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
org.seasar.framework.aop.interceptors.TraceInterceptor.invoke(TraceInterceptor.java:50)
org.seasar.framework.aop.impl.NestedMethodInvocation.proceed(NestedMethodInvocation.java:43)
org.seasar.framework.aop.interceptors.InterceptorChain.invoke(InterceptorChain.java:42)
jp.dsic.scart3d.action.cart.impl.KototokiActionImpl$$EnhancedByS2AOP$$bed4c8$$MethodInvocation$$initialize0.proceed(MethodInvocationClassGenerator.java)
jp.dsic.scart3d.action.cart.impl.KototokiActionImpl$$EnhancedByS2AOP$$bed4c8.initialize(KototokiActionImpl$$EnhancedByS2AOP$$bed4c8.java)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:138)
org.seasar.jsf.util.InvokeUtil.invokeInternal(InvokeUtil.java:92)
org.seasar.jsf.util.InvokeUtil.invoke(InvokeUtil.java:72)
org.seasar.jsf.runtime.ViewRendererImpl.executeInitAction(ViewRendererImpl.java:148)
org.seasar.jsf.runtime.ViewRendererImpl.renderView(ViewRendererImpl.java:90)
org.seasar.jsf.application.S2ViewHandler.renderView(S2ViewHandler.java:123)
org.seasar.jsf.lifecycle.LifecycleImpl.render(LifecycleImpl.java:197)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:110)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.seasar.extension.filter.EncodingFilter.doFilter(EncodingFilter.java:62)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.seasar.framework.container.filter.S2ContainerFilter.doFilter(S2ContainerFilter.java:60)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:112)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
java.lang.Thread.run(Thread.java:619)