1 files changed, 2 insertions, 7 deletions
diff --git a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/SplitExpression.java b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/SplitExpression.java
index 1004fc74704..1ed862f4798 100644
--- a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/SplitExpression.java
+++ b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/SplitExpression.java
@@ -2,7 +2,6 @@
 package com.yahoo.vespa.indexinglanguage.expressions;
 
 import com.yahoo.document.DataType;
-import com.yahoo.document.DocumentType;
 import com.yahoo.document.datatypes.Array;
 import com.yahoo.document.datatypes.StringFieldValue;
 import com.yahoo.text.StringUtilities;
@@ -12,11 +11,12 @@ import java.util.regex.Pattern;
 /**
  * @author Simon Thoresen Hult
  */
-public class SplitExpression extends Expression {
+public final class SplitExpression extends Expression {
 
     private final Pattern splitPattern;
 
     public SplitExpression(String splitString) {
+        super(DataType.STRING);
         this.splitPattern = Pattern.compile(splitString);
     }
 
@@ -43,11 +43,6 @@ public class SplitExpression extends Expression {
     }
 
     @Override
-    public DataType requiredInputType() {
-        return DataType.STRING;
-    }
-
-    @Override
     public DataType createdOutputType() {
         return DataType.getArray(DataType.STRING);
     }