| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.nio; |
| |
| import java.util.Comparator; |
| import java.util.Spliterator; |
| import java.util.function.IntConsumer; |
| |
| /** |
| * A Spliterator.OfInt for sources that traverse and split elements |
| * maintained in a CharBuffer. |
| * |
| * @implNote |
| * The implementation is based on the code for the Array-based spliterators. |
| */ |
| class CharBufferSpliterator implements Spliterator.OfInt { |
| private final CharBuffer buffer; |
| private int index; // current index, modified on advance/split |
| private final int limit; |
| |
| CharBufferSpliterator(CharBuffer buffer) { |
| this(buffer, buffer.position(), buffer.limit()); |
| } |
| |
| CharBufferSpliterator(CharBuffer buffer, int origin, int limit) { |
| assert origin <= limit; |
| this.buffer = buffer; |
| this.index = (origin <= limit) ? origin : limit; |
| this.limit = limit; |
| } |
| |
| @Override |
| public OfInt trySplit() { |
| int lo = index, mid = (lo + limit) >>> 1; |
| return (lo >= mid) |
| ? null |
| : new CharBufferSpliterator(buffer, lo, index = mid); |
| } |
| |
| @Override |
| public void forEachRemaining(IntConsumer action) { |
| if (action == null) |
| throw new NullPointerException(); |
| CharBuffer cb = buffer; |
| int i = index; |
| int hi = limit; |
| index = hi; |
| while (i < hi) { |
| action.accept(cb.getUnchecked(i++)); |
| } |
| } |
| |
| @Override |
| public boolean tryAdvance(IntConsumer action) { |
| if (action == null) |
| throw new NullPointerException(); |
| if (index >= 0 && index < limit) { |
| action.accept(buffer.getUnchecked(index++)); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public long estimateSize() { |
| return (long)(limit - index); |
| } |
| |
| @Override |
| public int characteristics() { |
| return Buffer.SPLITERATOR_CHARACTERISTICS; |
| } |
| } |