Package org.eclipse.collections.api.multimap.list

Interface ListMultimap<K,V>

All Superinterfaces:

Multimap<K,V>, OrderedIterableMultimap<K,V>, ReversibleIterableMultimap<K,V>

All Known Subinterfaces:

ImmutableListMultimap<K,V>, MutableListMultimap<K,V>

public interface ListMultimap<K,V>
extends ReversibleIterableMultimap<K,V>

Method Summary

Modifier and Type	Method	Description
<K2, V2> BagMultimap<K2,V2>	collectKeyMultiValues(Function<? super K,? extends K2> keyFunction, Function<? super V,? extends V2> valueFunction)	Returns a new multimap with the results of applying the specified keyFunction and valueFunction on each key and corresponding values of the source multimap.
<K2, V2> BagMultimap<K2,V2>	collectKeysValues(Function2<? super K,? super V,Pair<K2,V2>> function)	Returns a new multimap with the results of applying the specified function on each key and value of the source multimap.
<V2> ListMultimap<K,V2>	collectValues(Function<? super V,? extends V2> function)	Returns a new multimap with the results of applying the specified function on each value of the source multimap.
UnsortedBagMultimap<V,K>	flip()	Given a Multimap from Domain -> Range return a multimap from Range -> Domain.
ListIterable<V>	get(K key)	Returns a view of all values associated with the given key.
ListMultimap<K,V>	newEmpty()	Creates a new instance of the same implementation type, using the default capacity and growth parameters.
ListMultimap<K,V>	rejectKeysMultiValues(Predicate2<? super K,? super RichIterable<V>> predicate)	Returns all elements of the source multimap that don't satisfy the predicate.
ListMultimap<K,V>	rejectKeysValues(Predicate2<? super K,? super V> predicate)	Returns all elements of the source multimap that don't satisfy the predicate.
ListMultimap<K,V>	selectKeysMultiValues(Predicate2<? super K,? super RichIterable<V>> predicate)	Returns all elements of the source multimap that satisfies the predicate.
ListMultimap<K,V>	selectKeysValues(Predicate2<? super K,? super V> predicate)	Returns all elements of the source multimap that satisfies the predicate.
ImmutableListMultimap<K,V>	toImmutable()	Returns an immutable copy of this Multimap if it is not already immutable.
MutableListMultimap<K,V>	toMutable()	Returns a mutable copy of this Multimap.

Methods inherited from interface org.eclipse.collections.api.multimap.Multimap

collectKeyMultiValues, collectKeysValues, collectValues, containsKey, containsKeyAndValue, containsValue, equals, forEachKey, forEachKeyMultiValues, forEachKeyValue, forEachValue, hashCode, isEmpty, keyBag, keyMultiValuePairsView, keySet, keysView, keyValuePairsView, multiValuesView, notEmpty, rejectKeysMultiValues, rejectKeysValues, selectKeysMultiValues, selectKeysValues, size, sizeDistinct, toMap, toMap, valuesView

Method Details

newEmpty

ListMultimap<K,V> newEmpty()

Description copied from interface: Multimap

Creates a new instance of the same implementation type, using the default capacity and growth parameters.

Specified by:

newEmpty in interface Multimap<K,V>

Specified by:

newEmpty in interface OrderedIterableMultimap<K,V>

Specified by:

newEmpty in interface ReversibleIterableMultimap<K,V>

get

ListIterable<V> get(K key)

Description copied from interface: Multimap

Returns a view of all values associated with the given key.

If the given key does not exist, an empty RichIterable is returned.

Specified by:

get in interface Multimap<K,V>

Specified by:

get in interface OrderedIterableMultimap<K,V>

Specified by:

get in interface ReversibleIterableMultimap<K,V>

Parameters:

key - the key to search for

toMutable

MutableListMultimap<K,V> toMutable()

Description copied from interface: Multimap

Returns a mutable copy of this Multimap.

Specified by:

toMutable in interface Multimap<K,V>

toImmutable

ImmutableListMultimap<K,V> toImmutable()

Description copied from interface: Multimap

Returns an immutable copy of this Multimap if it is not already immutable. If the Multimap is immutable, it will return itself.

The returned Multimap will be Serializable if this Multimap is Serializable.

Specified by:

toImmutable in interface Multimap<K,V>

flip

UnsortedBagMultimap<V,K> flip()

Description copied from interface: Multimap

Given a Multimap from Domain -> Range return a multimap from Range -> Domain.

Specified by:

flip in interface Multimap<K,V>

selectKeysValues

ListMultimap<K,V> selectKeysValues(Predicate2<? super K,? super V> predicate)

Description copied from interface: Multimap

Returns all elements of the source multimap that satisfies the predicate. This method is also commonly called filter.

e.g.
 return multimap.selectKeysValues(new Predicate2<Integer, Person>()
 {
     public boolean accept(Integer age, Person person)
     {
         return (age >= 18)
                  && (person.getAddress().getCity().equals("Metuchen"));
     }
 });
 

Specified by:

selectKeysValues in interface Multimap<K,V>

Specified by:

selectKeysValues in interface OrderedIterableMultimap<K,V>

Specified by:

selectKeysValues in interface ReversibleIterableMultimap<K,V>

Parameters:

predicate - a Predicate2 to use as the select criteria

Returns:

Multimap, which contains elements as a result of the select criteria

rejectKeysValues

ListMultimap<K,V> rejectKeysValues(Predicate2<? super K,? super V> predicate)

Description copied from interface: Multimap

Returns all elements of the source multimap that don't satisfy the predicate.

e.g.
 return multimap.rejectKeysValues(new Predicate2<Integer, Person>()
 {
     public boolean accept(Integer age, Person person)
     {
         return (age >= 18)
                  && (person.getAddress().getCity().equals("Metuchen"));
     }
 });
 

Specified by:

rejectKeysValues in interface Multimap<K,V>

Specified by:

rejectKeysValues in interface OrderedIterableMultimap<K,V>

Specified by:

rejectKeysValues in interface ReversibleIterableMultimap<K,V>

Parameters:

predicate - a Predicate2 to use as the reject criteria

Returns:

Multimap, which contains elements that don't satisfy the predicate

selectKeysMultiValues

ListMultimap<K,V> selectKeysMultiValues(Predicate2<? super K,? super RichIterable<V>> predicate)

Description copied from interface: Multimap

Returns all elements of the source multimap that satisfies the predicate. This method is also commonly called filter.

e.g.
 return multimap.selectKeysMultiValues(new Predicate2<Integer, Iterable<Person>>()
 {
     public boolean accept(Integer age, Iterable<Person> values)
     {
         return (age >= 18)
                  && ((RichIterable<Person>)values.size() >= 2);
     }
 });
 

Specified by:

selectKeysMultiValues in interface Multimap<K,V>

Specified by:

selectKeysMultiValues in interface OrderedIterableMultimap<K,V>

Specified by:

selectKeysMultiValues in interface ReversibleIterableMultimap<K,V>

Parameters:

predicate - a Predicate2 to use as the select criteria

Returns:

Multimap, which contains elements as a result of the select criteria

rejectKeysMultiValues

ListMultimap<K,V> rejectKeysMultiValues(Predicate2<? super K,? super RichIterable<V>> predicate)

Description copied from interface: Multimap

Returns all elements of the source multimap that don't satisfy the predicate.

e.g.
 return multimap.rejectKeysMultiValues(new Predicate2<Integer, Iterable<Person>>()
 {
     public boolean accept(Integer age, Iterable<Person> values)
     {
         return (age >= 18)
                  && ((RichIterable<Person>)values.size() >= 2);
     }
 });
 

Specified by:

rejectKeysMultiValues in interface Multimap<K,V>

Specified by:

rejectKeysMultiValues in interface OrderedIterableMultimap<K,V>

Specified by:

rejectKeysMultiValues in interface ReversibleIterableMultimap<K,V>

Parameters:

predicate - a Predicate2 to use as the reject criteria

Returns:

Multimap, which contains elements that don't satisfy the predicate

collectKeysValues

<K2,
V2> BagMultimap<K2,V2> collectKeysValues(Function2<? super K,? super V,Pair<K2,V2>> function)

Description copied from interface: Multimap

Returns a new multimap with the results of applying the specified function on each key and value of the source multimap. This method is also commonly called transform or map.

e.g.
 return multimap.collectKeysValues(new Function2<Integer, Person, Pair<String, String>>()
 {
     public Pair<String, String> valueOf(Integer age, Person person)
     {
         return Tuples.pair(age.toString(), person.getLastName());
     }
 });
 

Specified by:

collectKeysValues in interface Multimap<K,V>

Specified by:

collectKeysValues in interface OrderedIterableMultimap<K,V>

Parameters:

function - a Function2 to use for transformation

Returns:

Multimap, which contains elements as a result of the transformation

collectKeyMultiValues

<K2,
V2> BagMultimap<K2,V2> collectKeyMultiValues(Function<? super K,? extends K2> keyFunction,
 Function<? super V,? extends V2> valueFunction)

Description copied from interface: Multimap

Returns a new multimap with the results of applying the specified keyFunction and valueFunction on each key and corresponding values of the source multimap. This method is also commonly called transform or map.

e.g.
 return multimap.collectKeyMultiValues(each -> each + 1, Person::getLastName);
 

Specified by:

collectKeyMultiValues in interface Multimap<K,V>

Specified by:

collectKeyMultiValues in interface OrderedIterableMultimap<K,V>

Parameters:

keyFunction - Function to use transformation to get the key

valueFunction - Function to use transformation to get the values

Returns:

a new Multimap, which contains elements as a result of the transformation

collectValues

<V2> ListMultimap<K,V2> collectValues(Function<? super V,? extends V2> function)

Description copied from interface: Multimap

Returns a new multimap with the results of applying the specified function on each value of the source multimap. This method is also commonly called transform or map.

e.g.
 return multimap.collectValues(new Function<Person, String>()
 {
     public String valueOf(Person person)
     {
         return person.getLastName();
     }
 });
 

Specified by:

collectValues in interface Multimap<K,V>

Specified by:

collectValues in interface OrderedIterableMultimap<K,V>

Specified by:

collectValues in interface ReversibleIterableMultimap<K,V>

Parameters:

function - a Function to use for transformation

Returns:

Multimap, which contains elements as a result of the transformation