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com.google.common.collect
Class ImmutableMultiset.Builder<E>

java.lang.Object
  extended by com.google.common.collect.ImmutableMultiset.Builder<E>
Enclosing class:
ImmutableMultiset<E>
public static final class ImmutableMultiset.Builder<E>
extends Object

A builder for creating immutable multiset instances, especially public static final multisets ("constant multisets"). Example: 

 public static final ImmutableMultiset<Bean> BEANS =
       new ImmutableMultiset.Builder<Bean>()
           .addCopies(Bean.COCOA, 4)
           .addCopies(Bean.GARDEN, 6)
           .addCopies(Bean.RED, 8)
           .addCopies(Bean.BLACK_EYED, 10)
           .build();
Builder instances can be reused; it is safe to call build() multiple times to build multiple multisets in series. Each multiset is a superset of the multiset created before it.

Since:
2 (imported from Google Collections Library)

Constructor Summary
ImmutableMultiset.Builder()
          Creates a new builder.
 
Method Summary
 ImmutableMultiset.Builder<E> add(E... elements)
          Adds each element of elements to the ImmutableMultiset.
 ImmutableMultiset.Builder<E> add(E element)
          Adds element to the ImmutableMultiset.
 ImmutableMultiset.Builder<E> addAll(Iterable<? extends E> elements)
          Adds each element of elements to the ImmutableMultiset.
 ImmutableMultiset.Builder<E> addAll(Iterator<? extends E> elements)
          Adds each element of elements to the ImmutableMultiset.
 ImmutableMultiset.Builder<E> addCopies(E element, int occurrences)
          Adds a number of occurrences of an element to this ImmutableMultiset.
 ImmutableMultiset<E> build()
          Returns a newly-created ImmutableMultiset based on the contents of the Builder.
 ImmutableMultiset.Builder<E> setCount(E element, int count)
          Adds or removes the necessary occurrences of an element such that the element attains the desired count.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ImmutableMultiset.Builder

public ImmutableMultiset.Builder()
Creates a new builder. The returned builder is equivalent to the builder generated by ImmutableMultiset.builder().

Method Detail

add

public ImmutableMultiset.Builder<E> add(E element)
Adds element to the ImmutableMultiset.

Parameters:
element - the element to add
Returns:
this Builder object
Throws:
NullPointerException - if element is null

addCopies

public ImmutableMultiset.Builder<E> addCopies(E element,
                                              int occurrences)
Adds a number of occurrences of an element to this ImmutableMultiset.

Parameters:
element - the element to add
occurrences - the number of occurrences of the element to add. May be zero, in which case no change will be made.
Returns:
this Builder object
Throws:
NullPointerException - if element is null
IllegalArgumentException - if occurrences is negative, or if this operation would result in more than Integer.MAX_VALUE occurrences of the element

setCount

public ImmutableMultiset.Builder<E> setCount(E element,
                                             int count)
Adds or removes the necessary occurrences of an element such that the element attains the desired count.

Parameters:
element - the element to add or remove occurrences of
count - the desired count of the element in this multiset
Returns:
this Builder object
Throws:
NullPointerException - if element is null
IllegalArgumentException - if count is negative

add

public ImmutableMultiset.Builder<E> add(E... elements)
Adds each element of elements to the ImmutableMultiset.

Parameters:
elements - the elements to add
Returns:
this Builder object
Throws:
NullPointerException - if elements is null or contains a null element

addAll

public ImmutableMultiset.Builder<E> addAll(Iterable<? extends E> elements)
Adds each element of elements to the ImmutableMultiset.

Parameters:
elements - the Iterable to add to the ImmutableMultiset
Returns:
this Builder object
Throws:
NullPointerException - if elements is null or contains a null element

addAll

public ImmutableMultiset.Builder<E> addAll(Iterator<? extends E> elements)
Adds each element of elements to the ImmutableMultiset.

Parameters:
elements - the elements to add to the ImmutableMultiset
Returns:
this Builder object
Throws:
NullPointerException - if elements is null or contains a null element

build

public ImmutableMultiset<E> build()
Returns a newly-created ImmutableMultiset based on the contents of the Builder.

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