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The "DIHCustomFunctions" page has been changed by NoblePaul. http://wiki.apache.org/solr/DIHCustomFunctions -------------------------------------------------- New page: = Custom Functions for DIH = It is possible to plug in custom functions into DIH. Implement an [[http://svn.apache.org/viewvc/lucene/solr/trunk/contrib/dataimporthandler/src/main/java/org/apache/solr/handler/dataimport/Evaluator.java?view=markup|Evalutor]] and specify it in the data-config.xml . Following is an example of an evaluator which does a 'toLowerCase' on a String. {{{ <dataConfig> <function name="toLowerCase" class="foo.LowerCaseFunctionEvaluator"/> <document> <entity query="select * from table where name='${dih.functions.toLowerCase(dih.request.user)'"> <!- ......field declarations......-> </entity> </dataConfig> }}} The implementation of !LowerCaseFunctionEvaluator {{{ public class LowerCaseFunctionEvaluator implements Evaluator{ public String evaluate(String expression, Context context) { List l = EvaluatorBag.parseParams(expression, context.getVariableResolver()); if (l.size() != 1) { throw new RuntimeException("'toLowerCase' must have only one parameter "); } return l.get(0).toString().toLowerCase(); } } }}}
