Usamos minQueryLength ="0", para que busque sin haber ingresado un solo carácter, así al presionar en , se muestran todos los registros.
dropdown="true"
minQueryLength="0"
fromstart="true"
<p:outputLabel value="#{msg['field.tienda']}"/>
<e:autocompletetienda listener="#{tiendaController.handleSelect}"
value="#{choferController.tienda}"
itemLabel=" #{p.tienda}"
field="tienda"
minQueryLength="0"
dropdown="true"
fromstart="true"
/>
<composite:attribute name="dropdown" default="false"/>
<composite:attribute name="minQueryLength" default="1"/>
<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="dropdown" default="false"/>
<composite:attribute name="minQueryLength" default="1"/>
<composite:attribute name="fromstart" default="true"/>
<composite:attribute name="multiple" default="false" />
<composite:attribute name="itemLabel" />
<composite:attribute name="update" />
<composite:attribute name="rendered"/>
<composite:attribute name="required" default="false" />
<composite:attribute name="field"/>
<composite:attribute name="size" default="25"/>
<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="#{tiendaController.tiendaServices.complete}"
var="p"
required="#{cc.attrs.required}"
itemLabel="#{cc.attrs.itemLabel}"
itemValue="#{p}"
forceSelection="true">
<f:converter binding="#{tiendaConverter}"/>
<f:attribute name="field" value="#{cc.attrs.field}"/>
<f:attribute name="fielddropdown" value="#{cc.attrs.dropdown}"/>
<f:attribute name="fieldquerylenth" value="#{cc.attrs.minQueryLength}"/>
<f:attribute name="fromstart" value="#{cc.attrs.fromstart}"/>
<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.idtienda']} #{p.tienda}" />
</h:panelGrid>
</f:facet>
</p:autoComplete>
</composite:implementation>
</html>
@Inject
TiendaRepository repository;
public List<Tienda> complete(String query) {
List<Tienda> suggestions = new ArrayList<>();
try {
suggestions = repository.complete(query);
} catch (Exception e) {
JsfUtil.errorMessage("complete() " + e.getLocalizedMessage());
}
return suggestions;
}// </editor-fold>
