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/*
* Copyright (C) 2002-2017 Sebastiano Vigna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package it.unimi.dsi.fastutil.doubles;
import java.util.Collection;
/** A type-specific {@link Collection}; provides some additional methods
* that use polymorphism to avoid (un)boxing.
*
* Additionally, this class defines strengthens (again) {@link #iterator()}.
*
* @see Collection
*/
public interface DoubleCollection extends Collection, DoubleIterable {
/** Returns a type-specific iterator on the elements of this collection.
*
* Note that this specification strengthens the one given in
* {@link java.lang.Iterable#iterator()}, which was already
* strengthened in the corresponding type-specific class,
* but was weakened by the fact that this interface extends {@link Collection}.
*
* @return a type-specific iterator on the elements of this collection.
*/
@Override
DoubleIterator iterator();
/** Returns a type-specific iterator on this elements of this collection.
*
* @see #iterator()
* @deprecated As of fastutil 5, replaced by {@link #iterator()}.
*/
@Deprecated
DoubleIterator doubleIterator();
/** Ensures that this collection contains the specified element (optional operation).
* @see Collection#add(Object)
*/
boolean add(double key);
/** Returns {@code true} if this collection contains the specified element.
* @see Collection#contains(Object)
*/
boolean contains(double key);
/** Removes a single instance of the specified element from this
* collection, if it is present (optional operation).
*
*
Note that this method should be called {@link java.util.Collection#remove(Object) remove()}, but the clash
* with the similarly named index-based method in the {@link java.util.List} interface
* forces us to use a distinguished name. For simplicity, the set interfaces reinstates
* remove().
*
* @see Collection#remove(Object)
*/
boolean rem(double key);
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead.
*/
@Deprecated
@Override
boolean add(Double key);
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead.
*/
@Deprecated
@Override
boolean contains(Object key);
/** {@inheritDoc}
* @deprecated Please use (and implement) the {@code rem()} method instead.
*/
@Deprecated
@Override
boolean remove(Object key);
/** Returns a primitive type array containing the items of this collection.
* @return a primitive type array containing the items of this collection.
* @see Collection#toArray()
*/
double[] toDoubleArray();
/** Returns a primitive type array containing the items of this collection.
*
*
Note that, contrarily to {@link Collection#toArray(Object[])}, this
* methods just writes all elements of this collection: no special
* value will be added after the last one.
*
* @param a if this array is big enough, it will be used to store this collection.
* @return a primitive type array containing the items of this collection.
* @see Collection#toArray(Object[])
* @deprecated Please use {@code toArray()} instead—this method is redundant.
*/
@Deprecated
double[] toDoubleArray(double a[]);
/** Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array.
*
*
Note that, contrarily to {@link Collection#toArray(Object[])}, this
* methods just writes all elements of this collection: no special
* value will be added after the last one.
*
* @param a if this array is big enough, it will be used to store this collection.
* @return a primitive type array containing the items of this collection.
* @see Collection#toArray(Object[])
*/
double[] toArray(double a[]);
/** Adds all elements of the given type-specific collection to this collection.
*
* @param c a type-specific collection.
* @see Collection#addAll(Collection)
* @return true if this collection changed as a result of the call.
*/
boolean addAll(DoubleCollection c);
/** Checks whether this collection contains all elements from the given type-specific collection.
*
* @param c a type-specific collection.
* @see Collection#containsAll(Collection)
* @return true if this collection contains all elements of the argument.
*/
boolean containsAll(DoubleCollection c);
/** Remove from this collection all elements in the given type-specific collection.
*
* @param c a type-specific collection.
* @see Collection#removeAll(Collection)
* @return true if this collection changed as a result of the call.
*/
boolean removeAll(DoubleCollection c);
/** Retains in this collection only elements from the given type-specific collection.
*
* @param c a type-specific collection.
* @see Collection#retainAll(Collection)
* @return true if this collection changed as a result of the call.
*/
boolean retainAll(DoubleCollection c);
}