jsf-2 - 複合コンポーネント属性を子に公開する

Question

遅延読み込みを使用して dataTable にデータを読み込む必要があります。残念ながら、primefaces の dataTable はページネーションによる遅延読み込みのみをサポートしていますが、これはこのプロジェクトでは受け入れられないため、スクロールを使用してデータテーブルで遅延読み込みを許可するメカニズムをいくつか作成してテストしました (primefaces の liveScroll は遅延読み込みではありません)。次に、これらのメカニズムを複合コンポーネントに移動する必要があるため、primefaces dataTable をラップすることにしました。

<ui:component xmlns="http://www.w3.org/1999/xhtml"
          xmlns:ui="http://java.sun.com/jsf/facelets"
          xmlns:c="http://java.sun.com/jsf/composite"
          xmlns:p="http://primefaces.prime.com.tr/ui">

<c:interface>
    <c:attribute name="var" required="true" targets="tabela"/>
    <c:attribute name="value" required="true" targets="tabela" type="java.util.List"/>
    <c:attribute name="scrollable" targets="tabela"/>
    <c:attribute name="liveScroll" required="false" default="false"/>
    <c:attribute name="height" targets="tabela"/>
    <c:attribute name="emptyMessage" targets="tabela" default="Nenhuma dado a ser exibido"/>
    <c:attribute name="rows" targets="tabela"/>
    <c:attribute name="action" method-signature="void method()" required="false"/>

</c:interface>

<c:implementation>
    <div id="#{cc.clientId}">
        <p:dataTable id="tabela" var="#{cc.attrs.var}" value="#{cc.attrs.value}"
                     scrollable="#{scrollable}" height="#{cc.attrs.height}"
                     emptyMessage="#{cc.attrs.emptyMessage}" rows="10">
            <c:insertChildren/>
        </p:dataTable>
        <p:remoteCommand name="comandoAtualizarTabela" action="#{cc.attrs.action}" update="tabela" process="@none"/>
        <script type="text/javascript">
            if ("#{cc.attrs.liveScroll}") {
                var idEscapadoPainelLista = PrimeFaces.escapeClientId("#{cc.clientId}");
                jQuery(idEscapadoPainelLista).find(".ui-datatable-scrollable-body").scroll(function () {
                    if ((this.scrollTop == this.scrollHeight - this.clientHeight))
                        comandoAtualizarTabela();
                });
            }
        </script>
    </div>
</c:implementation>
</ui:component>

このコンポーネントを使用しようとすると、行にデータが表示されず、この例外が発生します。

[#|2012-07-12T09:34:10.010-0300|SEVERE|glassfish3.1.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-10;|org.apache.myfaces.view.facelets.el.ContextAwarePropertyNotFoundException: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'bean' resolved to null
at org.apache.myfaces.view.facelets.el.ContextAwareTagValueExpression.getType(ContextAwareTagValueExpression.java:79)
at org.primefaces.component.inputtext.InputTextRenderer.getConvertedValue(InputTextRenderer.java:113)
at javax.faces.component.UIInput.getConvertedValue(UIInput.java:647)
at javax.faces.component.UIInput.validate(UIInput.java:583)
at javax.faces.component.UIInput.processValidators(UIInput.java:273)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1317)
at javax.faces.component.UIData.process(UIData.java:1919)
at javax.faces.component.UIData.processColumnChildren(UIData.java:1904)
at javax.faces.component.UIData.processValidators(UIData.java:1761)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1317)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1317)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIForm.processValidators(UIForm.java:209)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1324)
at javax.faces.component.UIViewRoot._processValidatorsDefault(UIViewRoot.java:1350)
at javax.faces.component.UIViewRoot.access$500(UIViewRoot.java:74)
at javax.faces.component.UIViewRoot$ProcessValidatorPhaseProcessor.process(UIViewRoot.java:1443)
at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1306)
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:793)
at org.apache.myfaces.lifecycle.ProcessValidationsExecutor.execute(ProcessValidationsExecutor.java:38)
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at fr.xebia.servlet.filter.ExpiresFilter.doFilter(ExpiresFilter.java:1243)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:369)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:97)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:100)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:78)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:35)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:177)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:187)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:79)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:109)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:109)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:381)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:168)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.gr|#]
[#|2012-07-12T09:34:10.011-0300|SEVERE|glassfish3.1.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-10;|izzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:662)
Caused by: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'bean' resolved to null
at com.sun.el.parser.AstValue.getTarget(AstValue.java:131)
at com.sun.el.parser.AstValue.getType(AstValue.java:76)
at com.sun.el.ValueExpressionImpl.getType(ValueExpressionImpl.java:195)
at org.apache.myfaces.view.facelets.el.ContextAwareTagValueExpression.getType(ContextAwareTagValueExpression.java:75)
... 90 more|#]

追加した

アプリケーションは、Spring バージョン 3.0.7 を使用します。アプリケーションに 20 以上の spring xml ファイルがあると、1 つの spring ファイルの一部だけが表示されます... この部分は、複合コンポーネントでテストしているダイアログを構成します。

<bean id="controladorPopupCadastroUnidade" class="com.hrgi.web.cadastro.controladores.popups.ControladorPopupCadastroUnidade" scope="request">
     <property name="controladorArmazenamento" ref="controladorArmazenamentoUnidade"/>
    <property name="conversorValor" ref="conversorUnidade"/>
    <property name="modelo" ref="modeloPopupCadastroUnidade"/>
    <property name="popupAlerta" ref="controladorPopupAlerta"/>
    <property name="recuperadorValores" ref="unidadeDao"/>
    <property name="popupConfirmacao" ref="controladorPopupConfirmacao"/>
</bean>

<bean id="modeloPopupCadastroUnidade" class="com.hrgi.web.ui.modelos.ModeloPopupCRUD" scope="session">
    <property name="visivel" value="false"/>
    <property name="mensagemSucesso" value="${gerais.lista.sucesso}" />
</bean>

<bean id="controladorArmazenamentoUnidade" class="com.hrgi.persistencia.controladores.ControladorArmazenamento" scope="request">
    <property name="armazenador" ref="unidadeDao"/>
    <property name="atualizador" ref="unidadeDao"/>
    <property name="removedor" ref="unidadeDao"/>
    <property name="conversor" ref="conversorUnidade"/>
</bean>

問題を確認するのに役立つように、cc を使用しようとしている xhtml ファイルの dataTable 部分を次に示します。

<h:panelGroup id="painelLista" layout="block" styleClass="clearfix">
    <hrgi:dataTable var="bean" value="#{modeloPopupCadastroUnidade.lista}"
                         scrollable="true" height="145"
                         action="#{controladorPopupCadastroUnidade.atualizarValores}"
                         liveScroll="true" rows="10">
        <p:column headerText="Nome" style="width: 23%">
            <hrgi:cellEditor>
                <f:facet name="saida">
                    <h:outputText value="#{bean.descricao}"/>
                </f:facet>
                <f:facet name="entrada">
                    <p:inputText value="#{bean.descricao}" maxlength="35" style="width: 90%"/>
                </f:facet>
            </hrgi:cellEditor>
        </p:column>
        <p:column headerText="Sigla">
            <hrgi:cellEditor>
                <f:facet name="saida">
                    <h:outputText value="#{bean.sigla}"/>
                </f:facet>
                <f:facet name="entrada">
                    <p:inputText value="#{bean.sigla}" maxlength="5"/>
                </f:facet>
            </hrgi:cellEditor>
        </p:column>
        <p:column headerText="Fator" sortBy="#{bean.fator}">
            <hrgi:cellEditor>
                <f:facet name="saida">
                    <h:outputText value="#{bean.fator}"/>
                </f:facet>
                <f:facet name="entrada">
                    <hrgi:spinner value="#{bean.fator}" dinheiro="false" fator="1" local="pt-BR" width="40"/>
                </f:facet>
            </hrgi:cellEditor>
        </p:column>
        <p:column headerText="Fracionado" sortBy="#{bean.fracionado}">
            <hrgi:cellEditor>
                <f:facet name="saida">
                    <h:outputText value="#{bean.fracionado eq true?'Sim':'Não'}"/>
                </f:facet>
                <f:facet name="entrada">
                    <h:selectBooleanCheckbox value="#{bean.fracionado}"/>
                </f:facet>
            </hrgi:cellEditor>
        </p:column>
        <p:column headerText="Unitário" sortBy="#{bean.unitario}">
            <hrgi:cellEditor>
                <f:facet name="saida">
                    <h:outputText value="#{bean.unitario eq true?'Sim':'Não'}"/>
                </f:facet>
                <f:facet name="entrada">
                    <h:selectBooleanCheckbox value="#{bean.unitario}"/>
                </f:facet>
            </hrgi:cellEditor>
        </p:column>
        <p:column>
            <hrgi:rowEditor action="#{controladorPopupCadastroUnidade.editarValor(bean)}" update="alerta" indice="#{bean.indice}"/>
            <p:commandLink title="#{msgGerais['gerais.excluir']}"                               action="#{controladorPopupCadastroUnidade.removerValor(bean)}"                                       update="painelLista alerta confirmacao" immediate="true">
                <h:graphicImage library="img" name="remover.png"/>
            </p:commandLink>
        </p:column>
    </hrgi:dataTable>
</h:panelGroup>

おそらく問題は、複合コンポーネントの外部で var プロパティを使用できないことです...この属性を外部に公開する方法はありますか? どうすれば解決できますか？