What causes selectOneChoice to be rendered as text instead of drop down?

Question

I notice that my UIInput components are being rendered as HTML text rather than their normal HTML tags when I specify a value in EL. For example, the selectOneChoice component is rendered as:
&lt!-- Start: oracle.adf.SelectOne["ruleSelection"] --&gt&ltspan id="form1:ruleSelection" class="x6"&gtCredit Okay&lt/span&gt
so I can't see the drop down arrow or box or any of the other options since it doesn't use the normal HTML select tag.
The source is below:
Except from jsp page
<af:selectOneChoice binding="#{testRuleSetBackingBean.ruleSelection}"
id="ruleSelection" value="#{testRuleSetBackingBean.rows[0].rule}">
<f:selectItems value="#{testRuleSetBackingBean.ruleNames}"
binding="#{testRuleSetBackingBean.ruleItem}" id="ruleItem"/>
</af:selectOneChoice>
However if I remove the value attribute from ruleSelection then it renders as expected, with a drop down box with all the items in.
More source below:
Excerpt from backing bean:
private RuleCondition[] rows;
//bindings for ruleSelection
public void setRuleSelection(CoreSelectOneChoice selectOneMenu1) {
this.ruleSelection = selectOneMenu1;
public CoreSelectOneChoice getRuleSelection() {
return ruleSelection;
//bindings for ruleItem
public void setRuleItem(UISelectItems selectItems1) {
this.ruleItem = selectItems1;
public UISelectItems getRuleItem() {
return ruleItem;
// items in the list are names of rules
public ArrayList<SelectItem> getRuleNames(){
//... just returns an array list of javax.faces.model.SelectItem
//with each SelectItem containing a value and label that are String objects
Except from RuleCondition.java
private Rule rule;
public Rule getRule(){
return rule;
public String toString(){
     return this.getClass().getName();
// equals overriden so that we can equate a String object and a Rule object
// if the String equals the class name of the Rule
public boolean equals(Object obj){
          if (obj instanceof String){
               if (this.getClass().getName().equals(obj)){
                    return true;
               }else {
                    return false;
          }else if(this.getClass().getName().equals(obj.getClass().getName())){
               return true;
          }else {
               return false;
Other info
Using ADF Faces implementation 10_1_3_0_4
Using MyFaces 1.1.3 (same results with 1.1.1)
Turning debug-output on in adf-faces-config.xml produced nothing
Any hints on what may cause this behaviour?

Answer 1

Minutes after posting this I determined the answer - lack of setters. I added:
RuleCondition.getRule(.....)
TestRuleSetBackingBean.setRuleNames(....)
and hey, presto - I can now see the drop down.
This makes perfect sense to me now - it was determining this as a read-only property. Nice.