com.martiansoftware.trivialpersist.helpers
Class FieldComparator

java.lang.Object
  com.martiansoftware.trivialpersist.helpers.FieldComparator

All Implemented Interfaces:

Comparator

public class FieldComparator

extends Object

implements Comparator

A simple field-based comparator that can be used in selects.

Author:

Marty Lamb

Field Summary

static int	ORDER_ASCENDING Instructs the comparator to return results in ASCENDING order
static int	ORDER_DESCENDING Instructs the comparator to return results in DESCENDING order

Constructor Summary

FieldComparator(String fieldName)
Creates a new FieldComparator for the specified field in ascending order

FieldComparator(String fieldName, int order)
Creates a new FieldComparator for the specified field in the specified order

Method Summary

int	compare(Object o1, Object o2) Performs the field comparison

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Field Detail

ORDER_ASCENDING

public static final int ORDER_ASCENDING

Instructs the comparator to return results in ASCENDING order

See Also:

Constant Field Values

ORDER_DESCENDING

public static final int ORDER_DESCENDING

Instructs the comparator to return results in DESCENDING order

See Also:

Constant Field Values

Constructor Detail

FieldComparator

public FieldComparator(String fieldName)

Creates a new FieldComparator for the specified field in ascending order

Parameters:

fieldName - the name of the field to examine

FieldComparator

public FieldComparator(String fieldName,
                       int order)

Creates a new FieldComparator for the specified field in the specified order

Parameters:

fieldName - the name of the field to examine

order - must be either ORDER_ASCENDING or ORDER_DESCENDING

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Performs the field comparison

Specified by:

compare in interface Comparator

Parameters:

o1 - the first Record to compare

o2 - the second Record to compare