Re: [Simple-support] help with deserializing XML to ElementMap

[Niall G. <gal...@ya...>]

Hi Micah,

I've tested this, everything works as expected.
However you have no need for the Field class. If you
specify a map key as an attribute=true then its
inlined in to the created wrapper element entry=true.
So if you use the following:

      @ElementMap(name="fields", entry="field",
key="id", attribute=true)
      private HashMap<String, Lucene> fields = new
HashMap<String, Lucene>();

Then everything works fine. BTW, if you use generics
you don't need to declare keyType or valueType in the
annotation.

Niall


--- Micah Jaffe <mi...@af...> wrote:

> 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
> 
>
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