Github user mmiklavc commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/119#discussion_r63105055
--- Diff:
metron-platform/metron-common/src/main/java/org/apache/metron/common/query/PredicateProcessor.java
---
@@ -18,12 +18,20 @@
package org.apache.metron.common.query;
-import org.antlr.v4.runtime.*;
-import org.apache.metron.common.query.generated.*;
+import org.antlr.v4.runtime.ANTLRInputStream;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.TokenStream;
+import org.apache.metron.common.query.generated.PredicateLexer;
+import org.apache.metron.common.query.generated.PredicateParser;
+
+import static org.apache.commons.lang3.StringUtils.isEmpty;
public class PredicateProcessor {
public boolean parse(String rule, VariableResolver resolver) {
+ if (isEmpty(rule)) {
--- End diff --
It appears that Hadoop Configuration resolves empty values to null - this
handled both circumstances. I can add this for the PredicateProcessor and then
add an additional translation in the client where the val is pulled from the
Hadoop conf.
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