/*
 * Copyright (c) 2018 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.api.collection;

import java.util.Collection;
import java.util.Spliterator;
import java.util.Spliterators;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.bag.ImmutableBag;
import org.eclipse.collections.api.block.function.Function;
import org.eclipse.collections.api.block.function.Function0;
import org.eclipse.collections.api.block.function.Function2;
import org.eclipse.collections.api.block.function.primitive.BooleanFunction;
import org.eclipse.collections.api.block.function.primitive.ByteFunction;
import org.eclipse.collections.api.block.function.primitive.CharFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleFunction;
import org.eclipse.collections.api.block.function.primitive.FloatFunction;
import org.eclipse.collections.api.block.function.primitive.IntFunction;
import org.eclipse.collections.api.block.function.primitive.LongFunction;
import org.eclipse.collections.api.block.function.primitive.ShortFunction;
import org.eclipse.collections.api.block.predicate.Predicate;
import org.eclipse.collections.api.block.predicate.Predicate2;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.collection.primitive.ImmutableBooleanCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableByteCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableCharCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableDoubleCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableFloatCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableIntCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableLongCollection;
import org.eclipse.collections.api.collection.primitive.ImmutableShortCollection;
import org.eclipse.collections.api.map.ImmutableMap;
import org.eclipse.collections.api.map.primitive.ImmutableObjectDoubleMap;
import org.eclipse.collections.api.map.primitive.ImmutableObjectLongMap;
import org.eclipse.collections.api.multimap.ImmutableMultimap;
import org.eclipse.collections.api.partition.PartitionImmutableCollection;
import org.eclipse.collections.api.tuple.Pair;

ImmutableCollection is the common interface between ImmutableList, ImmutableSet and ImmutableBag. The ImmutableCollection interface is "contractually immutable" in that it does not have any mutating methods available on the public interface.
/** * ImmutableCollection is the common interface between ImmutableList, ImmutableSet and ImmutableBag. * The ImmutableCollection interface is "contractually immutable" in that it does not have any mutating * methods available on the public interface. */
public interface ImmutableCollection<T> extends RichIterable<T> {
This method is similar to the with method in MutableCollection with the difference that a new copy of this collection with the element appended will be returned.
/** * This method is similar to the <code>with</code> method in <code>MutableCollection</code> * with the difference that a new copy of this collection with the element appended will be returned. */
ImmutableCollection<T> newWith(T element);
This method is similar to the without method in MutableCollection with the difference that a new copy of this collection with the element removed will be returned.
/** * This method is similar to the <code>without</code> method in <code>MutableCollection</code> * with the difference that a new copy of this collection with the element removed will be returned. */
ImmutableCollection<T> newWithout(T element);
This method is similar to the withAll method in MutableCollection with the difference that a new copy of this collection with the elements appended will be returned.
/** * This method is similar to the <code>withAll</code> method in <code>MutableCollection</code> * with the difference that a new copy of this collection with the elements appended will be returned. */
ImmutableCollection<T> newWithAll(Iterable<? extends T> elements);
This method is similar to the withoutAll method in MutableCollection with the difference that a new copy of this collection with the elements removed will be returned.
/** * This method is similar to the <code>withoutAll</code> method in <code>MutableCollection</code> * with the difference that a new copy of this collection with the elements removed will be returned. */
ImmutableCollection<T> newWithoutAll(Iterable<? extends T> elements); @Override ImmutableCollection<T> tap(Procedure<? super T> procedure); @Override ImmutableCollection<T> select(Predicate<? super T> predicate); @Override <P> ImmutableCollection<T> selectWith(Predicate2<? super T, ? super P> predicate, P parameter); @Override ImmutableCollection<T> reject(Predicate<? super T> predicate); @Override <P> ImmutableCollection<T> rejectWith(Predicate2<? super T, ? super P> predicate, P parameter); @Override PartitionImmutableCollection<T> partition(Predicate<? super T> predicate); @Override <P> PartitionImmutableCollection<T> partitionWith(Predicate2<? super T, ? super P> predicate, P parameter); @Override <S> ImmutableCollection<S> selectInstancesOf(Class<S> clazz); @Override <V> ImmutableCollection<V> collect(Function<? super T, ? extends V> function); @Override ImmutableBooleanCollection collectBoolean(BooleanFunction<? super T> booleanFunction); @Override ImmutableByteCollection collectByte(ByteFunction<? super T> byteFunction); @Override ImmutableCharCollection collectChar(CharFunction<? super T> charFunction); @Override ImmutableDoubleCollection collectDouble(DoubleFunction<? super T> doubleFunction); @Override ImmutableFloatCollection collectFloat(FloatFunction<? super T> floatFunction); @Override ImmutableIntCollection collectInt(IntFunction<? super T> intFunction); @Override ImmutableLongCollection collectLong(LongFunction<? super T> longFunction); @Override ImmutableShortCollection collectShort(ShortFunction<? super T> shortFunction); @Override <P, V> ImmutableCollection<V> collectWith(Function2<? super T, ? super P, ? extends V> function, P parameter); @Override <V> ImmutableCollection<V> collectIf(Predicate<? super T> predicate, Function<? super T, ? extends V> function); @Override <V> ImmutableCollection<V> flatCollect(Function<? super T, ? extends Iterable<V>> function);
Since:9.2
/** * @since 9.2 */
@Override default <P, V> ImmutableCollection<V> flatCollectWith(Function2<? super T, ? super P, ? extends Iterable<V>> function, P parameter) { return this.flatCollect(each -> function.apply(each, parameter)); } @Override <V> ImmutableObjectLongMap<V> sumByInt(Function<? super T, ? extends V> groupBy, IntFunction<? super T> function); @Override <V> ImmutableObjectDoubleMap<V> sumByFloat(Function<? super T, ? extends V> groupBy, FloatFunction<? super T> function); @Override <V> ImmutableObjectLongMap<V> sumByLong(Function<? super T, ? extends V> groupBy, LongFunction<? super T> function); @Override <V> ImmutableObjectDoubleMap<V> sumByDouble(Function<? super T, ? extends V> groupBy, DoubleFunction<? super T> function);
Since:9.0
/** * @since 9.0 */
@Override default <V> ImmutableBag<V> countBy(Function<? super T, ? extends V> function) { return this.asLazy().<V>collect(function).toBag().toImmutable(); }
Since:9.0
/** * @since 9.0 */
@Override default <V, P> ImmutableBag<V> countByWith(Function2<? super T, ? super P, ? extends V> function, P parameter) { return this.asLazy().<P, V>collectWith(function, parameter).toBag().toImmutable(); } @Override <V> ImmutableMultimap<V, T> groupBy(Function<? super T, ? extends V> function); @Override <V> ImmutableMultimap<V, T> groupByEach(Function<? super T, ? extends Iterable<V>> function); @Override <V> ImmutableMap<V, T> groupByUniqueKey(Function<? super T, ? extends V> function); @Override <S> ImmutableCollection<Pair<T, S>> zip(Iterable<S> that); @Override ImmutableCollection<Pair<T, Integer>> zipWithIndex(); @Override <K, V> ImmutableMap<K, V> aggregateInPlaceBy( Function<? super T, ? extends K> groupBy, Function0<? extends V> zeroValueFactory, Procedure2<? super V, ? super T> mutatingAggregator); @Override <K, V> ImmutableMap<K, V> aggregateBy( Function<? super T, ? extends K> groupBy, Function0<? extends V> zeroValueFactory, Function2<? super V, ? super T, ? extends V> nonMutatingAggregator);
Since:9.0
/** * @since 9.0 */
default Stream<T> stream() { return StreamSupport.stream(this.spliterator(), false); }
Since:9.0
/** * @since 9.0 */
default Stream<T> parallelStream() { return StreamSupport.stream(this.spliterator(), true); }
Since:9.0
/** * @since 9.0 */
@Override default Spliterator<T> spliterator() { return Spliterators.spliterator(this.iterator(), (long) this.size(), 0); }
This can be overridden in most implementations to just return this.
Since:9.0
/** * This can be overridden in most implementations to just return this. * * @since 9.0 */
Collection<T> castToCollection(); }