| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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 java.lang; |
| |
| import static javaemul.internal.InternalPreconditions.checkElement; |
| |
| import java.util.PrimitiveIterator; |
| import java.util.Spliterator; |
| import java.util.Spliterators; |
| import java.util.stream.IntStream; |
| import java.util.stream.StreamSupport; |
| |
| import javaemul.internal.JsUtils; |
| |
| import jsinterop.annotations.JsMethod; |
| |
| /** |
| * Abstracts the notion of a sequence of characters. |
| */ |
| public interface CharSequence { |
| char charAt(int index); |
| |
| int length(); |
| |
| CharSequence subSequence(int start, int end); |
| |
| @Override |
| String toString(); |
| |
| default IntStream chars() { |
| return StreamSupport.intStream(() -> { |
| PrimitiveIterator.OfInt it = new PrimitiveIterator.OfInt() { |
| int cursor; |
| |
| @Override |
| public int nextInt() { |
| checkElement(hasNext()); |
| return charAt(cursor++); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return cursor < length(); |
| } |
| }; |
| return Spliterators.spliterator(it, length(), Spliterator.ORDERED); |
| }, Spliterator.SIZED | Spliterator.SUBSIZED | Spliterator.ORDERED, false); |
| } |
| |
| // CHECKSTYLE_OFF: Utility methods. |
| @JsMethod |
| static boolean $isInstance(HasCharSequenceTypeMarker instance) { |
| if (JsUtils.typeOf(instance).equals("string")) { |
| return true; |
| } |
| |
| return instance != null && instance.getTypeMarker() == true; |
| } |
| // CHECKSTYLE_ON: end utility methods |
| } |