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

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

Hi,

Thanks for the response, but as you can see in the XML, the  
particular attribute it's complaining about (attribute "id" in  
element "field") is in fact there.  Any other thoughts?

-Micah

On Feb 25, 2008, at 2:01 PM, Niall Gallagher wrote:

> Hi,
>
> Required means it can not be null, if it is not
> required and null it won't appear. So you must provide
> a value for required attributes.
>
> 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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