| /* |
| * 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.commons.text.translate; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Executes a sequence of translators one after the other. Execution ends whenever |
| * the first translator consumes codepoints from the input. |
| * |
| * @since 1.0 |
| */ |
| public class AggregateTranslator extends CharSequenceTranslator { |
| |
| /** |
| * Translator list. |
| */ |
| private final List<CharSequenceTranslator> translators = new ArrayList<>(); |
| |
| /** |
| * Specify the translators to be used at creation time. |
| * |
| * @param translators CharSequenceTranslator array to aggregate |
| */ |
| public AggregateTranslator(final CharSequenceTranslator... translators) { |
| if (translators != null) { |
| for (final CharSequenceTranslator translator : translators) { |
| if (translator != null) { |
| this.translators.add(translator); |
| } |
| } |
| } |
| } |
| |
| /** |
| * The first translator to consume codepoints from the input is the 'winner'. |
| * Execution stops with the number of consumed codepoints being returned. |
| * {@inheritDoc} |
| */ |
| @Override |
| public int translate(final CharSequence input, final int index, final Writer out) throws IOException { |
| for (final CharSequenceTranslator translator : translators) { |
| final int consumed = translator.translate(input, index, out); |
| if (consumed != 0) { |
| return consumed; |
| } |
| } |
| return 0; |
| } |
| |
| } |