org.springframework.util.comparator
Class BooleanComparator

java.lang.Object
  org.springframework.util.comparator.BooleanComparator

All Implemented Interfaces:

Serializable, Comparator

public final class BooleanComparator
extends Object
implements Comparator, Serializable

A Comparator for Boolean objects that can sort either true or false first.

Since:

1.2.2

Author:

Keith Donald

See Also:

Serialized Form

Field Summary

static BooleanComparator	TRUE_HIGH A shared default instance of this comparator, treating true higher than false.
static BooleanComparator	TRUE_LOW A shared default instance of this comparator, treating true lower than false.

Constructor Summary

BooleanComparator(boolean trueLow)
Create a BooleanComparator that sorts boolean values based on the provided flag.

Method Summary

int	compare(Object o1, Object o2)
boolean	equals(Object obj)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TRUE_LOW

public static final BooleanComparator TRUE_LOW

A shared default instance of this comparator, treating true lower than false.

TRUE_HIGH

public static final BooleanComparator TRUE_HIGH

A shared default instance of this comparator, treating true higher than false.

Constructor Detail

BooleanComparator

public BooleanComparator(boolean trueLow)

Create a BooleanComparator that sorts boolean values based on the provided flag.

Alternatively, you can use the default shared instances: BooleanComparator.TRUE_LOW and BooleanComparator.TRUE_HIGH.

Parameters:

trueLow - whether to treat true as lower or higher than false

See Also:

TRUE_LOW, TRUE_HIGH

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator

equals

public boolean equals(Object obj)

Specified by:

equals in interface Comparator

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object