it.unimi.dsi.fastutil.longs.LongBigListIterator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of fastutil Show documentation

fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.

There is a newer version: 8.5.15

Show newest version

/*
	* Copyright (C) 2010-2017 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.longs;
import it.unimi.dsi.fastutil.BigListIterator;
import it.unimi.dsi.fastutil.SafeMath;
/**
 * A type-specific {@link BigListIterator}.
 *
 * @see BigListIterator
 */
public interface LongBigListIterator extends LongBidirectionalIterator, BigListIterator {
	/**
	 * Replaces the last element returned by {@link BigListIterator#next() next()}
	 * or {@link BigListIterator#previous() previous()} with the specified element
	 * (optional operation).
	 * 
	 * @see java.util.ListIterator#set(Object)
	 */
	default void set(@SuppressWarnings("unused") final long k) {
		throw new UnsupportedOperationException();
	}
	/**
	 * Inserts the specified element into the list (optional operation).
	 * 
	 * @see java.util.ListIterator#add(Object)
	 */
	default void add(@SuppressWarnings("unused") final long k) {
		throw new UnsupportedOperationException();
	}
	/**
	 * Replaces the last element returned by {@link #next()} or {@link #previous()}
	 * with the specified element (optional operation).
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default void set(final Long k) {
		set(k.longValue());
	}
	/**
	 * Inserts the specified element into the list (optional operation).
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default void add(final Long k) {
		add(k.longValue());
	}
	/**
	 * Skips the given number of elements.
	 *
	 * 
	 * The effect of this call is exactly the same as that of calling
	 * {@link BigListIterator#next() next()} for {@code n} times (possibly stopping
	 * if {@link #hasNext()} becomes false).
	 *
	 * @param n
	 *            the number of elements to skip.
	 * @return the number of elements actually skipped.
	 * @see BigListIterator#next()
	 */
	default long skip(final long n) {
		long i = n;
		while (i-- != 0 && hasNext())
			nextLong();
		return n - i - 1;
	}
	/**
	 * Moves back for the given number of elements.
	 *
	 * 
	 * The effect of this call is exactly the same as that of calling
	 * {@link BigListIterator#previous() previous()} for {@code n} times (possibly
	 * stopping if {@link #hasPrevious()} becomes false).
	 *
	 * @param n
	 *            the number of elements to skip back.
	 * @return the number of elements actually skipped.
	 * @see BigListIterator#previous()
	 */
	default long back(final long n) {
		long i = n;
		while (i-- != 0 && hasPrevious())
			previousLong();
		return n - i - 1;
	}
	/**
	 * {@inheritDoc}
	 */
	@Override
	default int skip(int n) {
		return SafeMath.safeLongToInt(skip((long) n));
	}
}