[SOLR-2463] Using an evaluator outside the scope of an entity results in a null context

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 3.1.1, 3.5, 3.6, 3.6.1, 4.0-ALPHA
• Fix Version/s: 3.1.1
• Component/s: contrib - DataImportHandler
• Assignee: Shalin Shekhar Mangar
• Reporter: Robert Zotter
• Created: 08/Apr/11 20:48
• Updated: 29/Aug/20 18:35
• Resolved: 29/Aug/20 18:35

Description

When using an Evaluator outside an entity element the Context argument is null.

foo.LowerCaseFunctionEvaluator.java

public class LowerCaseFunctionEvaluator extends 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();
 }
}

data-config.xml

<dataSource name="..."
            type="..."
            driver="..."
            url="..."
            user="${dataimporter.functions.toLowerCase('THIS_WILL_NOT_WORK')}"
            password="..."/>

data-config.xml

<entity name="..."
        dataSource="..."
        query="select * from ${dataimporter.functions.toLowerCase('THIS_WILL_WORK')}"/>

This use case worked in 1.4

Issue Links

• is duplicated by: SOLR-2899 Custom DIH Functions in Delta-Query have null Context
• is related to: SOLR-2186 DataImportHandler multi-threaded option throws exception
• is superceded by: SOLR-14783 Remove DIH from 9.0