4
到現在爲止，我有一個與LazyDataModel JSF受管bean，看起來像下面。java.lang.ArithmeticException：/由零與Primefaces LazyDataModel
@Controller
@Scope("request")
public final class StateManagedBean extends LazyDataModel<StateTable>
{
@Autowired
private StateService stateService;
private final List<StateTable>list;
private List<StateTable> selectedValues;
private List<StateTable> filteredValues;
private Long id;
public StateManagedBean()
{
list=null;
stateService=null;
}
@Override
public List<StateTable> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters)
{
int rowCount = stateService.rowCount().intValue();
int currentPage = currentPage(first, pageSize);
if(rowCount<=currentPage*pageSize-pageSize)
{
first-=pageSize;
}
if(pageSize<=0)
{
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_FATAL, "Error!", "The page size supplied is incorrect. The current operation has been rejected.");
FacesContext.getCurrentInstance().addMessage(null, message);
return Collections.emptyList();
}
if(filters!=null&&!filters.isEmpty())
{
List<StateTable> stateTables = stateService.getList(first, pageSize, sortOrder, sortField, filters);
setRowCount(stateTables.size());
return stateTables;
}
setRowCount(rowCount);
return stateService.getList(first, pageSize, sortOrder, sortField);
}
}
與其他一些方法，執行一些非常基本的數據庫操作工作正常。
因爲我需要幾個查詢字符串參數提供給這個託管bean，我已經修改了它移除就像@Controller，@ManagedBean，@RequestScoped和@Autowired註釋（它與Spring 3.2.2集成）。
這JSF則託管bean是在faces-config.xml文件等構成，
<application>
<el-resolver>
org.springframework.web.jsf.el.SpringBeanFacesELResolver
</el-resolver>
</application>
<managed-bean>
<managed-bean-name>stateManagedBean</managed-bean-name>
<managed-bean-class>admin.mangedbean.StateManagedBean</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>stateService</property-name>
<value>#{stateService}</value>
</managed-property>
<managed-property>
<property-name>id</property-name>
<value>#{param.id}</value>
<property-class>java.lang.Long</property-class>
</managed-property>
</managed-bean>
經過這樣的修改，我得到了以下意外的異常。
INFO: java.lang.ArithmeticException:/by zero
java.lang.ArithmeticException:/by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:227)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:506)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
May 16, 2013 9:11:06 PM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.ArithmeticException:/by zero
java.lang.ArithmeticException:/by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processValidators(UIData.java:241)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:508)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1170)
at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
May 16, 2013 9:11:06 PM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.ArithmeticException:/by zero
java.lang.ArithmeticException:/by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processUpdates(UIData.java:253)
at org.primefaces.component.datatable.DataTable.processUpdates(DataTable.java:550)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:510)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1229)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
例外，當我在類似下面的管理bean推翻了setRowIndex()方法只消失了。
@Override
public void setRowIndex(int rowIndex)
{
if(rowIndex==-1||getPageSize()==0)
{
super.setRowIndex(-1);
}
else
{
super.setRowIndex(rowIndex%getPageSize());
}
}
所以，這是Primefaces的問題嗎？我正在使用Mojarra 2.1.9和Primefaces 3.5。它看起來像一個問題here。在這種情況下，以這種方式覆蓋setRowIndex()方法是否足夠？
你試過調用expliclitly lazyModel.setPageSize（）？我認爲這個問題在https://code.google.com/p/primefaces/issues/detail?id=1544中有描述。 –
不，我不明確地調用該方法。 – Tiny
覆蓋setRowIndex（）解決了我的問題。謝謝！ ;-) –