@Override
  public HiveCharWritable getWritableConstantValue() {
    return value;
  }
A WritableConstantHiveCharObjectInspector is a WritableHiveCharObjectInspector
that implements ConstantObjectInspector.
serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/primitive/WritableConstantHiveCharObjectInspector.java