org.apache.openjpa.kernel
Class OrderingMergedResultObjectProvider

java.lang.Object
  org.apache.openjpa.lib.rop.MergedResultObjectProvider
      org.apache.openjpa.kernel.OrderingMergedResultObjectProvider

All Implemented Interfaces:

ResultObjectProvider, Closeable

public class OrderingMergedResultObjectProvider
extends MergedResultObjectProvider

Merged result object provider specialization that extracts ordering values from results for comparison.

Author:

Abe White

Constructor Summary

OrderingMergedResultObjectProvider(ResultObjectProvider[] rops, boolean[] asc, StoreQuery.Executor[] execs, StoreQuery q, Object[] params)

OrderingMergedResultObjectProvider(ResultObjectProvider[] rops, boolean[] asc, StoreQuery.Executor exec, StoreQuery q, Object[] params)

Method Summary

protected Object

getOrderingValue(Object val, int idx, ResultObjectProvider rop) Return the value to use for ordering on the given result value.

Methods inherited from class org.apache.openjpa.lib.rop.MergedResultObjectProvider

absolute, close, getResultObject, handleCheckedException, next, open, reset, size, supportsRandomAccess

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OrderingMergedResultObjectProvider

public OrderingMergedResultObjectProvider(ResultObjectProvider[] rops,
                                          boolean[] asc,
                                          StoreQuery.Executor exec,
                                          StoreQuery q,
                                          Object[] params)

OrderingMergedResultObjectProvider

public OrderingMergedResultObjectProvider(ResultObjectProvider[] rops,
                                          boolean[] asc,
                                          StoreQuery.Executor[] execs,
                                          StoreQuery q,
                                          Object[] params)

Method Detail

getOrderingValue

protected Object getOrderingValue(Object val,
                                  int idx,
                                  ResultObjectProvider rop)

Description copied from class: MergedResultObjectProvider

Return the value to use for ordering on the given result value. Returns the result value by default.

Overrides:

getOrderingValue in class MergedResultObjectProvider

Parameters:

val - the result value

idx - the index of the result object provider in the array given on construction that produced the result value

rop - the result object provider that produced the result value