public class NullSafeComparator<T>
extends java.lang.Object
implements java.util.Comparator<T>
Comparable
Modifier and Type | Field and Description |
---|---|
static NullSafeComparator |
NULLS_HIGH
A shared default instance of this comparator, treating nulls higher
than non-null objects.
|
static NullSafeComparator |
NULLS_LOW
A shared default instance of this comparator, treating nulls lower
than non-null objects.
|
Constructor and Description |
---|
NullSafeComparator(java.util.Comparator<T> comparator,
boolean nullsLow)
Create a NullSafeComparator that sorts
null based on the
provided flag, decorating the given Comparator. |
Modifier and Type | Method and Description |
---|---|
int |
compare(T o1,
T o2) |
boolean |
equals(java.lang.Object other) |
int |
hashCode() |
java.lang.String |
toString() |
public static final NullSafeComparator NULLS_LOW
Comparators.nullsLow()
public static final NullSafeComparator NULLS_HIGH
Comparators.nullsHigh()
public NullSafeComparator(java.util.Comparator<T> comparator, boolean nullsLow)
null
based on the
provided flag, decorating the given Comparator.
When comparing two non-null objects, the specified Comparator will be used. The given underlying Comparator must be able to handle the elements that this Comparator will be applied to.
comparator
- the comparator to use when comparing two non-null objectsnullsLow
- whether to treat nulls lower or higher than non-null objectspublic int compare(@Nullable T o1, @Nullable T o2)
compare
in interface java.util.Comparator<T>
public boolean equals(java.lang.Object other)
equals
in interface java.util.Comparator<T>
equals
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object