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