public void setInputObjInspectors(ObjectInspector[] inputObjInspectors) {
    this.inputObjInspectors = inputObjInspectors;
  }
Collects all the parent's output object inspectors and calls actual
initialization method.

@param hconf
@param inputOI
         OI of the row that this parent will pass to this op
@param parentId
         parent operator id
@throws HiveException
ql/src/java/org/apache/hadoop/hive/ql/exec/Operator.java