Class AbstractHashBag<T>

java.lang.Object
org.eclipse.collections.impl.AbstractRichIterable<T>
org.eclipse.collections.impl.bag.AbstractBag<T>
org.eclipse.collections.impl.bag.mutable.AbstractMutableBagIterable<T>
org.eclipse.collections.impl.bag.mutable.AbstractMutableBag<T>
org.eclipse.collections.impl.bag.mutable.AbstractHashBag<T>
All Implemented Interfaces:
Iterable<T>, Collection<T>, Bag<T>, MutableBag<T>, MutableBagIterable<T>, UnsortedBag<T>, MutableCollection<T>, InternalIterable<T>, RichIterable<T>
Direct Known Subclasses:
HashBag, HashBagWithHashingStrategy
public abstract class AbstractHashBag<T> extends AbstractMutableBag<T>

  • Field Details

  • Constructor Details

    • AbstractHashBag

      public AbstractHashBag()

  • Method Details

    • addOccurrences

      public int addOccurrences(T item, int occurrences)
      Description copied from interface: MutableBagIterable
      Add number of occurrences for an item. If the item does not exist, then the item is added to the bag.

      For Example: 

      MutableBagIterable<String> names = Bags.mutable.of("A", "B", "B");
Assert.assertEquals(4, names.addOccurrences("A", 3));
      Returns:
      updated number of occurrences.

    • equals

      public boolean equals(Object other)
      Description copied from interface: Bag
      Two bags b1 and b2 are equal if m1.toMapOfItemToCount().equals(m2.toMapOfItemToCount()).
      Specified by:
      equals in interface Bag<T>
      Specified by:
      equals in interface Collection<T>
      Overrides:
      equals in class Object
      See Also:

    • hashCode

      public int hashCode()
      Description copied from interface: Bag
      Returns the hash code for this Bag, defined as this.Bag.toMapOfItemToCount().hashCode().
      Specified by:
      hashCode in interface Bag<T>
      Specified by:
      hashCode in interface Collection<T>
      Overrides:
      hashCode in class Object
      See Also:

    • computeHashCode

      protected abstract int computeHashCode(T item)

    • getKeysView

      protected RichIterable<T> getKeysView()
      Specified by:
      getKeysView in class AbstractMutableBagIterable<T>

    • sizeDistinct

      public int sizeDistinct()
      Description copied from interface: Bag
      The size of the Bag when counting only distinct elements.

    • occurrencesOf

      public int occurrencesOf(Object item)
      Description copied from interface: Bag
      The occurrences of a distinct item in the bag.

    • forEachWithOccurrences

      public void forEachWithOccurrences(ObjectIntProcedure<? super T> objectIntProcedure)
      Description copied from interface: Bag
      For each distinct item, with the number of occurrences, execute the specified procedure.

    • anySatisfyWithOccurrences

      public boolean anySatisfyWithOccurrences(ObjectIntPredicate<? super T> predicate)
      Description copied from interface: Bag
      Returns true if the predicate evaluates to true for any element of the Bag. Returns false if the Bag is empty or if no element returns true for the predicate.

    • allSatisfyWithOccurrences

      public boolean allSatisfyWithOccurrences(ObjectIntPredicate<? super T> predicate)
      Description copied from interface: Bag
      Returns true if the predicate evaluates to true for all elements of the Bag. Returns false if the Bag is empty or if not all elements return true for the predicate.

    • noneSatisfyWithOccurrences

      public boolean noneSatisfyWithOccurrences(ObjectIntPredicate<? super T> predicate)
      Description copied from interface: Bag
      Returns true if the Bag is empty or if the predicate evaluates to false for all elements of the Bag. Returns false if the predicate evaluates to true for at least one element of the Bag.

    • detectWithOccurrences

      public T detectWithOccurrences(ObjectIntPredicate<? super T> predicate)
      Description copied from interface: Bag
      Returns an element of the Bag that satisfies the predicate or null if such an element does not exist

    • toMapOfItemToCount

      public MutableMap<T,Integer> toMapOfItemToCount()
      Description copied from interface: Bag
      Converts the Bag to a Map of the Item type to its count as an Integer.

    • add

      public boolean add(T item)

    • remove

      public boolean remove(Object item)

    • clear

      public void clear()

    • isEmpty

      public boolean isEmpty()
      Description copied from interface: RichIterable
      Returns true if this iterable has zero items.
      Specified by:
      isEmpty in interface Collection<T>
      Specified by:
      isEmpty in interface RichIterable<T>
      Overrides:
      isEmpty in class AbstractRichIterable<T>

    • each

      public void each(Procedure<? super T> procedure)
      Description copied from interface: RichIterable
      The procedure is executed for each element in the iterable.

      Example using a Java 8 lambda expression: 

      people.each(person -> LOGGER.info(person.getName()));
      This method is a variant of InternalIterable.forEach(Procedure) that has a signature conflict with Iterable.forEach(java.util.function.Consumer).
      See Also:

    • forEachWithIndex

      public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)
      Description copied from interface: InternalIterable
      Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.

      Example using a Java 8 lambda: 

      people.forEachWithIndex((Person person, int index) -> LOGGER.info("Index: " + index + " person: " + person.getName()));

      Example using an anonymous inner class: 

      people.forEachWithIndex(new ObjectIntProcedure<Person>()
{
    public void value(Person person, int index)
    {
        LOGGER.info("Index: " + index + " person: " + person.getName());
    }
});
      Specified by:
      forEachWithIndex in interface InternalIterable<T>
      Overrides:
      forEachWithIndex in class AbstractRichIterable<T>

    • forEachWith

      public <P> void forEachWith(Procedure2<? super T, ? super P> procedure, P parameter)
      Description copied from interface: InternalIterable
      The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.

      Example using a Java 8 lambda: 

      people.forEachWith((Person person, Person other) ->
    {
        if (person.isRelatedTo(other))
        {
             LOGGER.info(person.getName());
        }
    }, fred);

      Example using an anonymous inner class: 

      people.forEachWith(new Procedure2<Person, Person>()
{
    public void value(Person person, Person other)
    {
        if (person.isRelatedTo(other))
        {
             LOGGER.info(person.getName());
        }
    }
}, fred);
      Specified by:
      forEachWith in interface InternalIterable<T>
      Overrides:
      forEachWith in class AbstractRichIterable<T>

    • iterator

      public Iterator<T> iterator()

    • removeOccurrences

      public boolean removeOccurrences(Object item, int occurrences)

    • setOccurrences

      public boolean setOccurrences(T item, int occurrences)

    • removeIf

      public boolean removeIf(Predicate<? super T> predicate)
      Description copied from interface: MutableCollection
      Removes all elements in the collection that evaluate to true for the specified predicate. 
      e.g.
return lastNames.removeIf(Predicates.isNull());

    • removeIfWith

      public <P> boolean removeIfWith(Predicate2<? super T, ? super P> predicate, P parameter)
      Description copied from interface: MutableCollection
      Removes all elements in the collection that evaluate to true for the specified predicate2 and parameter. 
      return lastNames.removeIfWith(Predicates2.isNull(), null);

    • removeAllIterable

      public boolean removeAllIterable(Iterable<?> iterable)
      See Also:

    • size

      public int size()
      Description copied from interface: RichIterable
      Returns the number of items in this iterable.

    • contains

      public boolean contains(Object o)
      Description copied from interface: RichIterable
      Returns true if the iterable has an element which responds true to element.equals(object).
      Specified by:
      contains in interface Collection<T>
      Specified by:
      contains in interface RichIterable<T>
      Overrides:
      contains in class AbstractRichIterable<T>

    • groupBy

      public <V> HashBagMultimap<V,T> groupBy(Function<? super T, ? extends V> function)
      Description copied from interface: RichIterable
      For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.

      Example using a Java 8 method reference: 

      Multimap<String, Person> peopleByLastName =
    people.groupBy(Person::getLastName);

    • groupByEach

      public <V> HashBagMultimap<V,T> groupByEach(Function<? super T, ? extends Iterable<V>> function)
      Description copied from interface: RichIterable
      Similar to RichIterable.groupBy(Function), except the result of evaluating function will return a collection of keys for each value.

    • distinctView

      public RichIterable<T> distinctView()
      Description copied from interface: Bag
      Returns an unmodifiable view on the distinct elements with the same complexity as the Bag implementation.
      Returns:
      an unmodifiable view on the distinct elements of the Bag.