Access Maps with Enum keys in facelet

[vdweij]

I was facing a problem where I had to display values of a Map with Enum keys. The Map is unordered so I could not simply iterate over it. For the sake of clarity I minimized the classed in order to demonstrate the case.

Here is the enum class:

public enum MyType{
     TYPE1 ,
     TYPE2
}

Here is the bean:

@name('myBean')
public class MyBean {
     public Map<MyType,Date> importDates;


     /* the class also contains the getter 'n setter 
        and some initialisation code for the
        importDates property */
}

My first attempt was unsuccessfully and yielded no output:

<h:outputText value="Date of type 1: #myBean.importDates['TYPE1']">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>
<h:outputText value="Date of type 2: #myBean.importDates['TYPE2']">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>

This is of course pretty logical since the key is an Enum an not a String. I worked around this by looping through the key set of the importDates Map and making them available as a parameter (note the absence of single quotes).

<c:forEach var="type" items="#{myBean.importDates.keySet()}">
     <ui:param name="#{type}" value="#{type}"/>
</c:forEach>

<h:outputText value="Date of type 1: #myBean.importDates[TYPE1]">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>
<h:outputText value="Date of type 2: #myBean.importDates[TYPE2]">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>

This gives me what I want but appears somewhat clumsy. Does someone know of a better approach? I know of the convertEnum tag but I couldn't fit that in.

[vdweij]

In components.xml I need to access the same property

<framework:entity-query name="myEQ" ejbql="SELECT MyEntity m WHERE m.type = 'TYPE1'">
     <framework:restrictions>
          <value>m.lastImportDate = #{myBean.importDates['TYPE1]'}</value>      
     </framework:restrictions>
</framework:entity-query>

and that does work! Now a String is converted to a Enum key. This looks odd when the same syntax fails in facelets.

[vdweij]

Crap... I noticed I forgot the braces in my example (the do exist in the code). The need to be in the outputText tag.

<c:forEach var="type" items="#{myBean.importDates.keySet()}">
     <ui:param name="#{type}" value="#{type}"/>
</c:forEach>

<h:outputText value="Date of type 1: #{myBean.importDates[TYPE1]}">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>
<h:outputText value="Date of type 2: #{myBean.importDates[TYPE2]}">
     <s:convertDateTime type="both" dateStyle="full"/>
</h:outputText>