com.jamonapi.utils

Class JAMonArrayComparator

java.lang.Object

com.jamonapi.utils.JAMonArrayComparator

All Implemented Interfaces:

Serializable, Comparator

public class JAMonArrayComparator
extends Object
implements Comparator, Serializable

This class allows you to compare Object[] arrays by multiple columns. It can also compare any Object that implements the ToArray interface. Each column will use the underlying Compareable interface in natural or reverse order depending on how it is added, or will use the passed in Comparator.

Note I took this code from fdsapi.com, and would like to eventually merge these 2 projects, so this class will eventually be replaced by the one in FDS.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
JAMonArrayComparator()
JAMonArrayComparator(int sortCol, boolean naturalOrder) Sort/compare the passed in col number starting at 0 in natural (true) or reverse (false) order based on the columns Compareable interface being called.

Method Summary

Modifier and Type	Method and Description
void	addCompareCol(int sortCol) Compare the passed in col in natural order
void	addCompareCol(int sortCol, boolean naturalOrder) Compare the passed in col in natural or reverse order
void	addCompareCol(int sortCol, Comparator comparator) Compare the passed in col based on the passed in Comparator
int	compare(Object o1, Object o2) Method used by the comparator interface.

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

JAMonArrayComparator

public JAMonArrayComparator()

JAMonArrayComparator

public JAMonArrayComparator(int sortCol,
                            boolean naturalOrder)

Sort/compare the passed in col number starting at 0 in natural (true) or reverse (false) order based on the columns Compareable interface being called.

Parameters:

sortCol -

naturalOrder -

Method Detail

addCompareCol

public void addCompareCol(int sortCol)

Compare the passed in col in natural order

addCompareCol

public void addCompareCol(int sortCol,
                          boolean naturalOrder)

Compare the passed in col in natural or reverse order

addCompareCol

public void addCompareCol(int sortCol,
                          Comparator comparator)

Compare the passed in col based on the passed in Comparator

compare

public int compare(Object o1,
                   Object o2)

Method used by the comparator interface.

   o1 < o2 - returns a negative integer
   o1 == o2 - returns zero
   o1 > o2 - returns a postitive integer
 

Iterate through all columns that should be compared (in the proper order) and call the Comparator for each of the column elements.

Specified by:

compare in interface Comparator