org.teiid.test.client.ctc

Class ListNestedSortComparator

java.lang.Object

org.teiid.test.client.ctc.ListNestedSortComparator

All Implemented Interfaces:

Serializable, Comparator

public class ListNestedSortComparator
extends Object
implements Comparator, Serializable

This class can be used for comparing lists of elements, when the fields to be sorted on and the comparison mechanism are dynamically specified.

Typically, the lists are records in a collection that is to be sorted.

Example

    Records...
      { "a1", "b1", "c1" } 
      { "a1", "b1", "c2" }
      { "a1", "b2", "c1" }
      { "a1", "b2", "c2" }
      { "a2", "b1", "c1" } 
      { "a2", "b1", "c2" } 
      { "a2", "b2", "c1" } 
      { "a2", "b2", "c2" }

    Records sorted in ascending order on columns 0, 2...
      { "a1", "b1", "c1" } 
      { "a1", "b2", "c1" }
      { "a1", "b2", "c2" }
      { "a1", "b1", "c2" }
      { "a2", "b1", "c1" } 
      { "a2", "b2", "c1" } 
      { "a2", "b1", "c2" } 
      { "a2", "b2", "c2" } 
 

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ListNestedSortComparator(int[] sortParameters) Constructs an instance of this class given the indicies of the parameters to sort on, and whether the sort should be in ascending or descending order.
ListNestedSortComparator(int[] sortParameters, boolean ascending) Constructs an instance of this class given the indicies of the parameters to sort on, and whether the sort should be in ascending or descending order.
ListNestedSortComparator(int[] sortParameters, List orderTypes) Constructs an instance of this class given the indicies of the parameters to sort on, and orderList used to determine the order in which each column is sorted.

Method Summary

Modifier and Type	Method and Description
int	compare(Object o1, Object o2) Compares its two arguments for order.
boolean	isDistinct()
void	setDistinctIndex(int distinctIndex)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

ListNestedSortComparator

public ListNestedSortComparator(int[] sortParameters)

Constructs an instance of this class given the indicies of the parameters to sort on, and whether the sort should be in ascending or descending order.

ListNestedSortComparator

public ListNestedSortComparator(int[] sortParameters,
                                boolean ascending)

Constructs an instance of this class given the indicies of the parameters to sort on, and whether the sort should be in ascending or descending order.

ListNestedSortComparator

public ListNestedSortComparator(int[] sortParameters,
                                List orderTypes)

Constructs an instance of this class given the indicies of the parameters to sort on, and orderList used to determine the order in which each column is sorted.

Method Detail

isDistinct

public boolean isDistinct()

setDistinctIndex

public void setDistinctIndex(int distinctIndex)

compare

public int compare(Object o1,
                   Object o2)

Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

The compare method returns

• -1 if object1 less than object 2
• 0 if object1 equal to object 2
• +1 if object1 greater than object 2

Specified by:

compare in interface Comparator

Parameters:

o1 - The first object being compared

o2 - The second object being compared