SOLR: dataImportHandler via HTTP

I was tasked with installing SOLR 3.2 on a new machine and use its geo-spatial search functionality. This cause the schema to change on the new machine. There's a script that populates our SOLR 1.4 index but it contains a lot of business logic to for me to transform it into the 3.2 schema. So, what I did was to use the dataImportHandler to move necessary data from the 1.4 index to 3.2. 

When querying the SOLR index using the admin console, the generated XML will look something similar to this:

<response>
  <result name="response" numFound="471728" start="0">
    <doc>
      <str name="ID">98339511</str>
      <str name="REMARKS">CUSTOM BUILT, 10,20,40 CUSTOM BUILT</str>
      <str name="NICHE">4</str>
    </doc>
    <doc>
      <str name="ID">98311340</str>
      <str name="REMARKS">1986 MERCEDES_BENZ, MERCEDES BENZ L1113 CAB</str>
      <str name="NICHE">4</str>
    </doc>
  </result>
</response>

If you notice, the node is named str and the field name is actually the value of the attribute named "name". To use the value of attribute, the xpath symbol @ was used. Thus, my data-config.xml ended up with this:

<dataConfig>
  <dataSource type="HttpDataSource" />
  <document>
    <entity column="Doc"
            pk="ID"
            processor="XPathEntityProcessor"
            url="http://host:port/solr/coreName/select/?q=NICHE%3A4"
            onError="skip"
            forEach="/response/result/doc/">
      <field column="ID" xpath="/response/result/doc/str[@name='ID']" />
      <field column="DESCRIPTION" xpath="/response/result/doc/str[@name='REMARKS']" />
      <field column="SITE" xpath="/response/result/doc/str[@name='NICHE'] "/>
    </entity>
  </document>
</dataConfig>

The onError attribute signals SOLR to skip the document if it encounters an error.