[Simple-support] help with deserializing XML to ElementMap

[Micah J. <mi...@af...>]

I'm trying to convert some existing XML parsing code to use Simple  
XML and am almost there, but I'm running into an issue trying to use  
ElementMap.

Here's the XML (abbreviated):

<?xml version="1.0" encoding="ISO-8859-1"?>
<index id="users">
     <database>xyz</database>
     <query>
         <columns>foo,bar</columns>
         <tables>a,b,c</tables>
     </query>
     <fields>
         <field id="foo">
             <lucene>
                 <index>TOKENIZED</index>
                 <store>false</store>
                 <default>true</default>
             </lucene>
         </field>
         <field id="bar">
             <lucene>
                 <index>TOKENIZED</index>
                 <store>false</store>
                 <default>true</default>
             </lucene>
         </field>
     </fields>
</index>

Here are my classes:

@Root(name="index")
public class IndexConfig {

     @Attribute
     private String id;

     @Element
     private String database;

     @Element
     private Query query;

     @ElementMap(name="fields", entry="field", key="id",  
attribute=true, keyType=String.class, valueType=Field.class)
     private HashMap<String, Field> fields = new HashMap<String,  
Field>();
}

@Root
public class Field {

     @Attribute
     private String id;

     @Element
     private Lucene lucene;
}

[Not including Query or Lucene classes here as they're not at issue]

The parsing chokes here:

org.simpleframework.xml.load.ValueRequiredException: Unable to  
satisfy @org.simpleframework.xml.Attribute(name=, empty=,  
required=true) on field 'id' for class  
com.affinitycircles.core.xml.Field at line 16
         at org.simpleframework.xml.load.Composite.validate 
(Composite.java:389)
         at org.simpleframework.xml.load.Composite.readAttributes 
(Composite.java:221)
         at org.simpleframework.xml.load.Composite.read 
(Composite.java:193)
[... the rest deleted ...]

For some reason it can't seem to find the id attribute for Field.  If  
I make the id attribute optional, then it seems the parser gets  
confused and is looking for elements in the Lucene block.  If I  
change ElementMap to instead be an ElementList, the file will parse.   
I've tried not using @Root with Field and that doesn't affect the  
outcome (I'm really not sure what @Root is for...).

Any help?

-Micah