Class ImmutableSetMultimap.Builder<K,V>

java.lang.Object

com.google.common.collect.ImmutableMultimap.Builder<K,V>

com.google.common.collect.ImmutableSetMultimap.Builder<K,V>

Enclosing class:

ImmutableSetMultimap<K,V>

public static final class ImmutableSetMultimap.Builder<K,V>
extends ImmutableMultimap.Builder<K,V>

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

 static final Multimap<String, Integer> STRING_TO_INTEGER_MULTIMAP =
     new ImmutableSetMultimap.Builder<String, Integer>()
         .put("one", 1)
         .putAll("several", 1, 2, 3)
         .putAll("many", 1, 2, 3, 4, 5)
         .build();
 

Builder instances can be reused; it is safe to call build() multiple times to build multiple multimaps in series. Each multimap contains the key-value mappings in the previously created multimaps.

Since:

2.0

Author:

Mike Ward

Constructor Summary

Constructors

Constructor	Description
Builder()	Creates a new builder.

Method Summary

Modifier and Type	Method	Description
ImmutableSetMultimap<K,V>	build()	Returns a newly-created immutable set multimap.
ImmutableSetMultimap.Builder<K,V>	expectedValuesPerKey(int expectedValuesPerKey)	Provides a hint for how many values will be associated with each key newly added to the builder after this call.
ImmutableSetMultimap.Builder<K,V>	orderKeysBy(Comparator<? super K> keyComparator)	Specifies the ordering of the generated multimap's keys.
ImmutableSetMultimap.Builder<K,V>	orderValuesBy(Comparator<? super V> valueComparator)	Specifies the ordering of the generated multimap's values for each key.
ImmutableSetMultimap.Builder<K,V>	put(Map.Entry<? extends K,? extends V> entry)	Adds an entry to the built multimap if it is not already present.
ImmutableSetMultimap.Builder<K,V>	put(K key, V value)	Adds a key-value mapping to the built multimap if it is not already present.
ImmutableSetMultimap.Builder<K,V>	putAll(Multimap<? extends K,? extends V> multimap)	Stores another multimap's entries in the built multimap.
ImmutableSetMultimap.Builder<K,V>	putAll(Iterable<? extends Map.Entry<? extends K,? extends V>> entries)	Adds entries to the built multimap.
ImmutableSetMultimap.Builder<K,V>	putAll(K key, Iterable<? extends V> values)	Stores a collection of values with the same key in the built multimap.
ImmutableSetMultimap.Builder<K,V>	putAll(K key, V... values)	Stores an array of values with the same key in the built multimap.

Methods inherited from class java.lang.Object

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

Constructor Details

Builder

public Builder()

Creates a new builder. The returned builder is equivalent to the builder generated by ImmutableSetMultimap.builder().

Method Details

expectedValuesPerKey

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> expectedValuesPerKey(int expectedValuesPerKey)

Provides a hint for how many values will be associated with each key newly added to the builder after this call. This does not change semantics, but may improve performance if expectedValuesPerKey is a good estimate.

This may be called more than once; each newly added key will use the most recent call to ImmutableMultimap.Builder.expectedValuesPerKey as its hint.

Note that expectedValuesPerKey is taken to mean the expected number of distinct values per key.

Overrides:

expectedValuesPerKey in class ImmutableMultimap.Builder<K,V>

Since:

33.3.0

put

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> put(K key,
 V value)

Adds a key-value mapping to the built multimap if it is not already present.

Overrides:

put in class ImmutableMultimap.Builder<K,V>

put

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> put(Map.Entry<? extends K,? extends V> entry)

Adds an entry to the built multimap if it is not already present.

Overrides:

put in class ImmutableMultimap.Builder<K,V>

Since:

11.0

putAll

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> putAll(Iterable<? extends Map.Entry<? extends K,? extends V>> entries)

Adds entries to the built multimap.

Overrides:

putAll in class ImmutableMultimap.Builder<K,V>

Since:

19.0

putAll

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> putAll(K key,
 Iterable<? extends V> values)

Description copied from class: ImmutableMultimap.Builder

Stores a collection of values with the same key in the built multimap.

Overrides:

putAll in class ImmutableMultimap.Builder<K,V>

putAll

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> putAll(K key,
 V... values)

Description copied from class: ImmutableMultimap.Builder

Stores an array of values with the same key in the built multimap.

Overrides:

putAll in class ImmutableMultimap.Builder<K,V>

putAll

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> putAll(Multimap<? extends K,? extends V> multimap)

Description copied from class: ImmutableMultimap.Builder

Stores another multimap's entries in the built multimap. The generated multimap's key and value orderings correspond to the iteration ordering of the multimap.asMap() view, with new keys and values following any existing keys and values.

Overrides:

putAll in class ImmutableMultimap.Builder<K,V>

orderKeysBy

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> orderKeysBy(Comparator<? super K> keyComparator)

Specifies the ordering of the generated multimap's keys.

Overrides:

orderKeysBy in class ImmutableMultimap.Builder<K,V>

Since:

8.0

orderValuesBy

@CanIgnoreReturnValue
public ImmutableSetMultimap.Builder<K,V> orderValuesBy(Comparator<? super V> valueComparator)

Specifies the ordering of the generated multimap's values for each key.

If this method is called, the sets returned by the get() method of the generated multimap and its Multimap.asMap() view are ImmutableSortedSet instances. However, serialization does not preserve that property, though it does maintain the key and value ordering.

Overrides:

orderValuesBy in class ImmutableMultimap.Builder<K,V>

Since:

8.0

build

public ImmutableSetMultimap<K,V> build()

Returns a newly-created immutable set multimap.

Overrides:

build in class ImmutableMultimap.Builder<K,V>