Autocomplete

Reglas:

cuando utilice autocomplete múltiples debe indicar los metodos

 <p:ajax event="itemSelect" listener="#{calendarioSolicitudController.handleSelect}"
                                update="eventDetails"
                                />
<p:ajax event="itemUnselect"  listener="#{calendarioSolicitudController.handleSelect}"
update="eventDetails"
/>

  • Componentes que permiten buscar registros de una colección mediante expresiones regulares.

  • Se muestran ejemplos con ejbjmoordb y JPA

  • Son mas eficientes para la búsqueda en grandes datos

  • Se basan en las búsquedas mediante expresiones regulares

  • Un componente para generar autocomplete con atributos, se guardan en la carpeta extensions dentro de resources

   <f:attribute name="field" value="#{cc.attrs.field}"/>
   <f:attribute name="fielddropdown" value="#{cc.attrs.dropdown}"/>
   <f:attribute name="fieldquerylenth" value="#{cc.attrs.minQueryLength}"/>
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:p="http://primefaces.org/ui"
      xmlns:composite="http://java.sun.com/jsf/composite"
      xmlns:h="http://xmlns.jcp.org/jsf/html">
    <composite:interface >


        <composite:attribute name="value" />
        <composite:attribute name="itemLabel" />
        <composite:attribute name="dropdown"  default="false"/>
         <composite:attribute name="minQueryLength"  default="1"/>
        <composite:attribute name="multiple" default="false" />
        <composite:attribute name="update" />
        <composite:attribute name="rendered"/>
        <composite:attribute name="field"/>
         <composite:attribute name="size"  default="25"/>
         <composite:attribute name="required" default="false" />
        <composite:attribute name="listener"  
                             method-signature="void handleSelect(org.primefaces.event.SelectEvent)" />

    </composite:interface>
    <composite:implementation>

        <p:autoComplete     dropdown="#{cc.attrs.dropdown}"    
                            scrollHeight="250"  
                             size="#{cc.attrs.size}" 
                           multiple="#{cc.attrs.multiple}" 
                            emptyMessage="#{app['info.nohayregistros']}" 
                            value="#{cc.attrs.value}"  
                            completeMethod="#{agenteController.agenteServices.complete}"    
                            var="p"
                            required="#{cc.attrs.required}"
                            itemLabel="#{cc.attrs.itemLabel}"
                            itemValue="#{p}" forceSelection="true"> 
            <f:converter binding="#{agenteConverter}"/>
            <f:attribute name="field" value="#{cc.attrs.field}"/>
            <f:attribute name="fielddropdown" value="#{cc.attrs.dropdown}"/>
            <f:attribute name="fieldquerylenth" value="#{cc.attrs.minQueryLength}"/>
            <p:ajax event="itemSelect" listener="#{cc.attrs.listener}"
                    update="#{cc.attrs.update}" />  
            <f:facet name="itemtip">
                <h:panelGrid columns="1" cellpadding="5">
                    <h:outputText value="#{msg['field.idagente']} #{p.idagente}" />
                    <h:outputText value="#{msg['field.nombre']} #{p.nombre}" />

                </h:panelGrid>
            </f:facet>
        </p:autoComplete>  

    </composite:implementation>

</html>

  • Services se verifican los atributos

  public List<Agente> complete(String query) {
        List<Agente> suggestions = new ArrayList<>();
        try {
            query = query.trim();
            String field = (String) UIComponent.getCurrentComponent(FacesContext.getCurrentInstance()).getAttributes().get("field");
            String fielddropdown = (String) UIComponent.getCurrentComponent(FacesContext.getCurrentInstance()).getAttributes().get("fielddropdown");
            String fieldquerylenth = (String) UIComponent.getCurrentComponent(FacesContext.getCurrentInstance()).getAttributes().get("fieldquerylenth");
            if (fielddropdown.equals("false")) {
                if (query.length() < Integer.parseInt(fieldquerylenth)) {
                    return suggestions;
                }
                suggestions = agenteRepository.findRegex(field, query, true, new Document(field, 1));
            } else {
                suggestions = agenteRepository.findRegexInText(field, query, true, new Document(field, 1));

            }

        } catch (Exception e) {
            JsfUtil.errorMessage("complete() " + e.getLocalizedMessage());
        }
        return suggestions;
    }
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