a4j:repeat Hashset iteration not working

[cheeray]

I'm using a4j:repeat to iterate a hashset, but the var of a4j:repeat had been parsed as a set:

Backend bean:

@Named
@ConversationScoped
public class BankReconciliation implements Serializable {

private final Set<BankStatement> statementsGroup = new HashSet<>();
... ...
public Set<BankStatement> getStatementsGroup() {
                    return statementsGroup;
          }
... ...
}

BankStatement entity:

@Entity
public class BankStatement implements Serializable {
private BigDecimal amount;
... ...
public BigDecimal getAmount() {
                    return amount;
          }
public void setAmount(BigDecimal amount) {
                    this.amount = amount;
          }

}

jsf xhtml:

<a4j:repeat var="statement" value="#{bankReconciliation.statementsGroup}">
     <rich:panel>
          <h:outputText value="#{statement.amount}" />
     </rich:panel>
</a4j:repeat>

but thrown JSF EL exception:

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[FacesServlet]] (http-localhost-127.0.0.1-8080-3) Servlet.service() for servlet FacesServlet threw exception: javax.el.PropertyNotFoundException: /statements.xhtml @184,52 value="#{statement.amount}": The class 'java.util.HashSet' does not have the property 'amount'.
          at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:111) [jsf-impl-2.1.7-jbossorg-2.jar:]
          at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
          at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
          at javax.faces.component.UIOutput.getValue(UIOutput.java:169) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
          at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:205) [jsf-impl-2.1.7-jbossorg-2.jar:]
          at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:355) [jsf-impl-2.1.7-jbossorg-2.jar:]
... ...

Any ideas to fix it? Thanks.

[robby.cornelissen]

a4j:repeat, like most other JSF collection-based components (h:dataTable, ui:repeat, etc.) don't allow iteration over a set because the order is not guaranteed.
To get this working, convert your collection to a list, e.g. by calling {code}new ArrayList<BankStatement>(statementsGroup);{code}

[cheeray]

Thanks Robby. I forgot this limitation.