[HIVEMALL-71] Handle null values in RescaleUDF.java

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Assignee: Makoto Yui
• Reporter: Yuming Wang
• Created: 13/Feb/17 09:18
• Updated: 09/Nov/17 03:33
• Resolved: 16/Feb/17 06:28

Description

Change:

    public FloatWritable evaluate(final float value, final float min,
final float max) {
        return val(min_max_normalization(value, min, max));
    }

to:

    @Nullable
    public FloatWritable evaluate(final Float value, final Float min,
final Float max) throws HiveException {
        if(value == null) {
            return null;
        }
        if(min == null) throw new HiveException("min should not be null");
        if(max == null) throw new HiveException("max should not be null");

        return val(min_max_normalization(value.floatValue(), min.floatValue(), max. floatValue()));
    }

Issue Links

• relates to: HIVEMALL-72 Fix rescale UDF behavior to return range [0.0,1.0]
• links to: GitHub Pull Request #45