com.google.common.collect.testing

Class Helpers.NullsBefore

java.lang.Object

com.google.common.collect.testing.Helpers.NullsBefore

All Implemented Interfaces:

Serializable, Comparator<String>

Direct Known Subclasses:

Helpers.NullsBeforeB, Helpers.NullsBeforeTwo

Enclosing class:

Helpers

public abstract static class Helpers.NullsBefore
extends Object
implements Comparator<String>, Serializable

Compares strings in natural order except that null comes immediately before a given value. This works better than Ordering.natural().nullsFirst() because, if null comes before all other values, it lies outside the submap/submultiset ranges we test, and the variety of tests that exercise null handling fail on those subcollections.

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullsBefore(String justAfterNull)

Method Summary

Modifier and Type	Method and Description
int	compare(String lhs, String rhs)
boolean	equals(Object obj)
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

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

Constructor Detail

NullsBefore

protected NullsBefore(String justAfterNull)

Method Detail

compare

public int compare(String lhs,
                   String rhs)

Specified by:

compare in interface Comparator<String>

equals

public boolean equals(Object obj)

Specified by:

equals in interface Comparator<String>

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object