AbstractMultiSet (The Adobe AEM Quickstart and Web Application.)

java.lang.Object
- java.util.AbstractCollection<E>
- - org.apache.commons.collections4.multiset.AbstractMultiSet<E>

Type Parameters:

E - the type held in the multiset

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, MultiSet<E>

Direct Known Subclasses:

AbstractMapMultiSet
```
public abstract class AbstractMultiSet<E>
extends java.util.AbstractCollection<E>
implements MultiSet<E>
```
Abstract implementation of the MultiSet interface to simplify the creation of subclass implementations.

Since:

4.1

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.commons.collections4.MultiSet
  MultiSet.Entry<E>

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(E object)` Adds one copy of the specified object to the MultiSet.
`int`	`add(E object, int occurrences)` Adds a number of occurrences of the specified object to the MultiSet.
`void`	`clear()` Clears the multiset removing all elements from the entrySet.
`boolean`	`contains(java.lang.Object object)` Determines if the multiset contains the given element.
`java.util.Set<MultiSet.Entry<E>>`	`entrySet()` Returns an unmodifiable view of the entries of this multiset.
`boolean`	`equals(java.lang.Object object)` Compares this MultiSet to another object.
`int`	`getCount(java.lang.Object object)` Returns the number of occurrence of the given element in this multiset by iterating over its entrySet.
`int`	`hashCode()` Gets a hash code for the MultiSet compatible with the definition of equals.
`java.util.Iterator<E>`	`iterator()` Gets an iterator over the multiset elements.
`boolean`	`remove(java.lang.Object object)` Removes one occurrence of the given object from the MultiSet.
`int`	`remove(java.lang.Object object, int occurrences)` Removes a number of occurrences of the specified object from the MultiSet.
`boolean`	`removeAll(java.util.Collection<?> coll)` Remove all occurrences of all elements from this MultiSet represented in the given collection.
`int`	`setCount(E object, int count)` Sets the number of occurrences of the specified object in the MultiSet to the given count.
`int`	`size()` Returns the number of elements in this multiset.
`java.lang.String`	`toString()` Implement a toString() method suitable for debugging.
`java.util.Set<E>`	`uniqueSet()` Returns a view of the unique elements of this multiset.

Methods inherited from class java.util.AbstractCollection
addAll, containsAll, isEmpty, retainAll, toArray, toArray

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.commons.collections4.MultiSet
containsAll, retainAll

Methods inherited from interface java.util.Collection
addAll, isEmpty, parallelStream, removeIf, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable
forEach

- Method Detail
  - size
```
public int size()
```
    Returns the number of elements in this multiset.
    
    Specified by:
    
    size in interface java.util.Collection<E>
    
    Specified by:
    
    size in interface MultiSet<E>
    
    Specified by:
    
    size in class java.util.AbstractCollection<E>
    
    Returns:
    
    current size of the multiset
  - getCount
```
public int getCount(java.lang.Object object)
```
    Returns the number of occurrence of the given element in this multiset by iterating over its entrySet.
    
    Specified by:
    
    getCount in interface MultiSet<E>
    
    Parameters:
    
    object - the object to search for
    
    Returns:
    
    the number of occurrences of the object, zero if not found
  - setCount
```
public int setCount(E object,
                    int count)
```
    Description copied from interface: MultiSet
    
    Sets the number of occurrences of the specified object in the MultiSet to the given count.
    If the provided count is zero, the object will be removed from the MultiSet.uniqueSet().
    
    Specified by:
    
    setCount in interface MultiSet<E>
    
    Parameters:
    
    object - the object to update
    
    count - the number of occurrences of the object
    
    Returns:
    
    the number of occurrences of the object before this operation, zero if the object was not contained in the multiset
  - contains
```
public boolean contains(java.lang.Object object)
```
    Determines if the multiset contains the given element.
    
    Specified by:
    
    contains in interface java.util.Collection<E>
    
    Overrides:
    
    contains in class java.util.AbstractCollection<E>
    
    Parameters:
    
    object - the object to search for
    
    Returns:
    
    true if the multiset contains the given element
  - iterator
```
public java.util.Iterator<E> iterator()
```
    Gets an iterator over the multiset elements. Elements present in the MultiSet more than once will be returned repeatedly.
    
    Specified by:
    
    iterator in interface java.lang.Iterable<E>
    
    Specified by:
    
    iterator in interface java.util.Collection<E>
    
    Specified by:
    
    iterator in interface MultiSet<E>
    
    Specified by:
    
    iterator in class java.util.AbstractCollection<E>
    
    Returns:
    
    the iterator
  - add
```
public boolean add(E object)
```
    Description copied from interface: MultiSet
    
    Adds one copy of the specified object to the MultiSet.
    If the object is already in the MultiSet.uniqueSet() then increment its count as reported by MultiSet.getCount(Object). Otherwise add it to the MultiSet.uniqueSet() and report its count as 1.
    
    Specified by:
    
    add in interface java.util.Collection<E>
    
    Specified by:
    
    add in interface MultiSet<E>
    
    Overrides:
    
    add in class java.util.AbstractCollection<E>
    
    Parameters:
    
    object - the object to add
    
    Returns:
    
    true always, as the size of the MultiSet is increased in any case
  - add
```
public int add(E object,
               int occurrences)
```
    Description copied from interface: MultiSet
    
    Adds a number of occurrences of the specified object to the MultiSet.
    If the object is already in the MultiSet.uniqueSet() then increment its count as reported by MultiSet.getCount(Object). Otherwise add it to the MultiSet.uniqueSet() and report its count as occurrences.
    
    Specified by:
    
    add in interface MultiSet<E>
    
    Parameters:
    
    object - the object to add
    
    occurrences - the number of occurrences to add, may be zero, in which case no change is made to the multiset
    
    Returns:
    
    the number of occurrences of the object in the multiset before this operation; possibly zero
  - clear
```
public void clear()
```
    Clears the multiset removing all elements from the entrySet.
    
    Specified by:
    
    clear in interface java.util.Collection<E>
    
    Overrides:
    
    clear in class java.util.AbstractCollection<E>
  - remove
```
public boolean remove(java.lang.Object object)
```
    Description copied from interface: MultiSet
    
    Removes one occurrence of the given object from the MultiSet.
    If the number of occurrences after this operations is reduced to zero, the object will be removed from the MultiSet.uniqueSet().
    
    Specified by:
    
    remove in interface java.util.Collection<E>
    
    Specified by:
    
    remove in interface MultiSet<E>
    
    Overrides:
    
    remove in class java.util.AbstractCollection<E>
    
    Parameters:
    
    object - the object to remove
    
    Returns:
    
    true if this call changed the collection
  - remove
```
public int remove(java.lang.Object object,
                  int occurrences)
```
    Description copied from interface: MultiSet
    
    Removes a number of occurrences of the specified object from the MultiSet.
    If the number of occurrences to remove is greater than the actual number of occurrences in the multiset, the object will be removed from the multiset.
    
    Specified by:
    
    remove in interface MultiSet<E>
    
    Parameters:
    
    object - the object to remove
    
    occurrences - the number of occurrences to remove, may be zero, in which case no change is made to the multiset
    
    Returns:
    
    the number of occurrences of the object in the multiset before the operation; possibly zero
  - removeAll
```
public boolean removeAll(java.util.Collection<?> coll)
```
    Description copied from interface: MultiSet
    
    Remove all occurrences of all elements from this MultiSet represented in the given collection.
    
    Specified by:
    
    removeAll in interface java.util.Collection<E>
    
    Specified by:
    
    removeAll in interface MultiSet<E>
    
    Overrides:
    
    removeAll in class java.util.AbstractCollection<E>
    
    Parameters:
    
    coll - the collection of elements to remove
    
    Returns:
    
    true if this call changed the multiset
  - uniqueSet
```
public java.util.Set<E> uniqueSet()
```
    Returns a view of the unique elements of this multiset.
    
    Specified by:
    
    uniqueSet in interface MultiSet<E>
    
    Returns:
    
    the set of unique elements in this multiset
  - entrySet
```
public java.util.Set<MultiSet.Entry<E>> entrySet()
```
    Returns an unmodifiable view of the entries of this multiset.
    
    Specified by:
    
    entrySet in interface MultiSet<E>
    
    Returns:
    
    the set of entries in this multiset
  - equals
```
public boolean equals(java.lang.Object object)
```
    Description copied from interface: MultiSet
    
    Compares this MultiSet to another object.
    This MultiSet equals another object if it is also a MultiSet that contains the same number of occurrences of the same elements.
    
    Specified by:
    
    equals in interface java.util.Collection<E>
    
    Specified by:
    
    equals in interface MultiSet<E>
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    object - the object to compare to
    
    Returns:
    
    true if equal
  - hashCode
```
public int hashCode()
```
    Description copied from interface: MultiSet
    
    Gets a hash code for the MultiSet compatible with the definition of equals. The hash code is defined as the sum total of a hash code for each element. The per element hash code is defined as (e==null ? 0 : e.hashCode()) ^ noOccurances).
    
    Specified by:
    
    hashCode in interface java.util.Collection<E>
    
    Specified by:
    
    hashCode in interface MultiSet<E>
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    the hash code of the MultiSet
  - toString
```
public java.lang.String toString()
```
    Implement a toString() method suitable for debugging.
    
    Overrides:
    
    toString in class java.util.AbstractCollection<E>
    
    Returns:
    
    a debugging toString

Class AbstractMultiSet<E>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.commons.collections4.MultiSet

Method Summary

Methods inherited from class java.util.AbstractCollection

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.commons.collections4.MultiSet

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Method Detail

size

getCount

setCount

contains

iterator

add

add

clear

remove

remove

removeAll

uniqueSet

entrySet

equals

hashCode

toString