| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 org.apache.poi.util; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| // based on https://gist.github.com/EmmanuelOga/48df70b27ead4d80234b |
| @Internal |
| public class StringCodepointsIterable implements Iterable<String> { |
| private class StringCodepointsIterator implements Iterator<String> { |
| private int index = 0; |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return index < StringCodepointsIterable.this.string.length(); |
| } |
| |
| @Override |
| public String next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| int codePoint = StringCodepointsIterable.this.string.codePointAt(index); |
| index += Character.charCount(codePoint); |
| return new String(Character.toChars(codePoint)); |
| } |
| } |
| |
| private final String string; |
| |
| public StringCodepointsIterable(final String string) { |
| this.string = string; |
| } |
| |
| @Override |
| public Iterator<String> iterator() { |
| return new StringCodepointsIterator(); |
| } |
| } |