当ValueExpression以编程方式设置时，UISelectItems值未转换为枚举

时间：2015-01-08 18:52:51

标签： jsf primefaces enums el jsf-2.2

我正在以编程方式创建UISelectItems。该值指向枚举数组。收到请求后，当EL尝试将值转换为枚举时，将抛出IllegalArgumentException。通过设置断点检查的UISelectItems值表达式似乎没问题。

UISelectItems value expression

这是EnumConfig：

@Named
public class EnumConfig {
    public LanguageTag[] getLanguageTagValues() { return LanguageTag.values(); }
}

封装SelectOneMenu的值表达式如下所示：

SelectOneMenu value expression 

@Model
public class ManageUsersBean {
    public LanguageTag getLanguageTag() { return languageTag; }
    public void setLanguageTag(LanguageTag arg) { languageTag = arg; }
}

这是堆栈跟踪：

Caused by: java.lang.IllegalArgumentException: No enum constant io.enterprizr.business.model.enumeration.preference.LanguageTag.[Lio.enterprizr.business.model.enumeration.preference.LanguageTag;@5f2ad22c
    at java.lang.Enum.valueOf(Enum.java:238) [rt.jar:1.8.0_05]
    at com.sun.el.lang.ELSupport.coerceToEnum(ELSupport.java:206) [javax.el-3.0.0.jar:]
    at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:405) [javax.el-3.0.0.jar:]
    at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:77) [javax.el-3.0.0.jar:]
    at javax.el.ELContext.convertToType(ELContext.java:473) [jboss-el-api_3.0_spec-1.0.3.Final.jar:1.0.3.Final]
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:229) [javax.el-3.0.0.jar:]
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UISelectItems.getValue(UISelectItems.java:129) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.renderkit.InputRenderer.getSelectItems(InputRenderer.java:54) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeMarkup(SelectOneMenuRenderer.java:73) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeEnd(SelectOneMenuRenderer.java:67) [primefaces-5.0.jar:5.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeRow(PanelGridRenderer.java:142) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeStaticBody(PanelGridRenderer.java:108) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:63) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49) [primefaces-5.0.jar:5.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.fieldset.FieldsetRenderer.encodeContent(FieldsetRenderer.java:94) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.fieldset.FieldsetRenderer.encodeMarkup(FieldsetRenderer.java:76) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.fieldset.FieldsetRenderer.encodeEnd(FieldsetRenderer.java:47) [primefaces-5.0.jar:5.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeRow(PanelGridRenderer.java:142) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeStaticBody(PanelGridRenderer.java:108) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:63) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49) [primefaces-5.0.jar:5.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:176) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:889) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1857) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeRow(PanelGridRenderer.java:142) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeStaticBody(PanelGridRenderer.java:108) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:63) [primefaces-5.0.jar:5.0]
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49) [primefaces-5.0.jar:5.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
    at org.primefaces.extensions.component.layout.LayoutPaneRenderer.encodeBegin(LayoutPaneRenderer.java:152) [primefaces-extensions-2.1.0.jar:2.1.0]
    at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:78) [primefaces-5.0.jar:5.0]
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
    at org.primefaces.extensions.component.layout.LayoutPaneRenderer.encodeBegin(LayoutPaneRenderer.java:152) [primefaces-extensions-2.1.0.jar:2.1.0]
    at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1855) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:461) [jsf-impl-2.2.6-jbossorg-4.jar:]
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133) [jsf-impl-2.2.6-jbossorg-4.jar:]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.2.6-jbossorg-4.jar:]
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.6-jbossorg-4.jar:]
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) [jsf-impl-2.2.6-jbossorg-4.jar:]
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
... 36 more

1 个答案:

答案 0 :(得分：3)

expectedType的{​​{1}}不对。它是viewSelectItems，但它应该是LanguageTag.class。

替换（虚构）

LanguageTag[].class

通过

createValueExpression("#{enumConfigBean.getLanguageTagValues()}", LanguageTag.class);
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