org.opencastproject.util

Class EqualsUtil

java.lang.Object

org.opencastproject.util.EqualsUtil

public final class EqualsUtil
extends Object

Utility function helping to implement equality.

Method Summary

Modifier and Type	Method and Description
static boolean	bothNotNull(Object a, Object b)
static boolean	bothNull(Object a, Object b)
static boolean	bothNullOrNot(Object a, Object b) Check if both objects are either null or not null.
static boolean	eq(Object a, Object b) Deprecated.
static boolean	eqClasses(Object a, Object b) Check if a and b have the same class (Object.getClass()).
static boolean	eqListSorted(List<?> as, List<?> bs) Deprecated. use eqObj(Object, Object) or List.equals(Object)
static boolean	eqListUnsorted(List<?> as, List<?> bs) Compare the (distinct) elements of two lists for equality treating the lists as sets.
static boolean	eqMap(Map<?,?> as, Map<?,?> bs) Deprecated. use eqObj(Object, Object) or Map.equals(Object)
static boolean	eqObj(Object a, Object b) Deprecated.
static int	hash(Object... as) Deprecated.
static boolean	ne(Object a, Object b) Check if a and b are not equal.

Methods inherited from class java.lang.Object

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

Method Detail

eqObj

@Deprecated
public static boolean eqObj(Object a,
                                        Object b)

Deprecated.

Check if a and b are equal. Each of them may be null.

eq

@Deprecated
public static boolean eq(Object a,
                                     Object b)

Deprecated.

Check if a and b are equal. Each of them may be null.

ne

public static boolean ne(Object a,
                         Object b)

Check if a and b are not equal. Each of them may be null.

eqClasses

public static boolean eqClasses(Object a,
                                Object b)

Check if a and b have the same class (Object.getClass()). Each may be null.

eqListUnsorted

public static boolean eqListUnsorted(List<?> as,
                                     List<?> bs)

Compare the (distinct) elements of two lists for equality treating the lists as sets.

Sets by definition do not allow multiplicity of elements; a set is a (possibly empty) collection of distinct elements. As Lists may contain non-unique entries, this method removes duplicates before continuing with the comparison check. Examples of 1. equality: {1, 2} = {2, 1} = {1, 1, 2} = {1, 2, 2, 1, 2}, null = null 2. unequal: {1, 2, 2} != {1, 2, 3}, null != {}

eqListSorted

public static boolean eqListSorted(List<?> as,
                                   List<?> bs)

Deprecated. use eqObj(Object, Object) or List.equals(Object)

Compare the elements of two lists one by one.

eqMap

public static boolean eqMap(Map<?,?> as,
                            Map<?,?> bs)

Deprecated. use eqObj(Object, Object) or Map.equals(Object)

Compare two maps.

bothNullOrNot

public static boolean bothNullOrNot(Object a,
                                    Object b)

Check if both objects are either null or not null.

bothNotNull

public static boolean bothNotNull(Object a,
                                  Object b)

bothNull

public static boolean bothNull(Object a,
                               Object b)

hash

@Deprecated
public static int hash(Object... as)

Deprecated.

Create a hash code for a list of objects. Each of them may be null. Algorithm adapted from "Programming in Scala, Second Edition", p670.