Package io.deephaven.util

Class UniversalSet<T>

java.lang.Object

io.deephaven.util.UniversalSet<T>

All Implemented Interfaces:

Serializable, Iterable<T>, Collection<T>, Set<T>

public class UniversalSet<T>
extends Object
implements Set<T>, Serializable

A universal Set that's acts as if all values are contained therein. The only supported operations are: Set.isEmpty() Set.contains(Object) Set.containsAll(Collection) Any other operations return an UnsupportedOperationException. Note that you can't use equals on a Set and a UniversalSet, because the Set's implementation will call unsupported methods from UniversalSet. If one of your Sets may be a universal set, use safeEquals(Set, Set) instead.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final Set	UNIVERSAL_SET

Method Summary

Modifier and Type	Method	Description
boolean	add(Object o)
boolean	addAll(Collection<? extends T> c)
void	clear()
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
final boolean	equals(Object other)
boolean	isEmpty()
Iterator<T>	iterator()
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
boolean	retainAll(Collection<?> c)
static boolean	safeEquals(Set a, Set b)	Safely compare two Sets, one of which may be a UniversalSet.
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] a)
static <T> Set<T>	universalSet()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

hashCode, spliterator

Field Details

UNIVERSAL_SET

public static final Set UNIVERSAL_SET

Method Details

safeEquals

public static boolean safeEquals(Set a,
 Set b)

Safely compare two Sets, one of which may be a UniversalSet.

universalSet

public static <T> Set<T> universalSet()

equals

public final boolean equals(Object other)

Specified by:

equals in interface Collection<T>

Specified by:

equals in interface Set<T>

Overrides:

equals in class Object

size

public int size()

Specified by:

size in interface Collection<T>

Specified by:

size in interface Set<T>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<T>

Specified by:

isEmpty in interface Set<T>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<T>

Specified by:

contains in interface Set<T>

iterator

public Iterator<T> iterator()

Specified by:

iterator in interface Collection<T>

Specified by:

iterator in interface Iterable<T>

Specified by:

iterator in interface Set<T>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<T>

Specified by:

toArray in interface Set<T>

add

public boolean add(Object o)

Specified by:

add in interface Collection<T>

Specified by:

add in interface Set<T>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<T>

Specified by:

remove in interface Set<T>

containsAll

public boolean containsAll(@NotNull
 Collection<?> c)

Specified by:

containsAll in interface Collection<T>

Specified by:

containsAll in interface Set<T>

addAll

public boolean addAll(@NotNull
 Collection<? extends T> c)

Specified by:

addAll in interface Collection<T>

Specified by:

addAll in interface Set<T>

retainAll

public boolean retainAll(@NotNull
 Collection<?> c)

Specified by:

retainAll in interface Collection<T>

Specified by:

retainAll in interface Set<T>

removeAll

public boolean removeAll(@NotNull
 Collection<?> c)

Specified by:

removeAll in interface Collection<T>

Specified by:

removeAll in interface Set<T>

clear

public void clear()

Specified by:

clear in interface Collection<T>

Specified by:

clear in interface Set<T>

toArray

public <T> T[] toArray(@NotNull
 T[] a)

Specified by:

toArray in interface Collection<T>

Specified by:

toArray in interface Set<T>