| /* |
| * 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.freemarker.generator.tools.utahparser.impl; |
| |
| import com.sonalake.utah.Parser; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| /** |
| * Wraps the <code>com.sonalake.utah.Parser</code> to provide convenience |
| * methods such as support of iterators. |
| */ |
| public class ParserWrapper implements Iterable<Map<String, String>> { |
| |
| /** The wrapped parser instance */ |
| private final Parser parser; |
| |
| public ParserWrapper(Parser parser) { |
| this.parser = requireNonNull(parser); |
| } |
| |
| @Override |
| public Iterator<Map<String, String>> iterator() { |
| return new RecordsIterator(parser); |
| } |
| |
| /** |
| * Iterates over all records and return a list. |
| * |
| * @return list of records |
| */ |
| public List<Map<String, String>> toList() { |
| final List<Map<String, String>> result = new ArrayList<>(); |
| for (Map<String, String> record : this) { |
| result.add(record); |
| } |
| return result; |
| } |
| |
| private static final class RecordsIterator implements Iterator<Map<String, String>> { |
| |
| private final Parser parser; |
| private Map<String, String> nextRecord; |
| |
| RecordsIterator(Parser parser) { |
| this.parser = requireNonNull(parser); |
| this.nextRecord = parser.next(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return nextRecord != null; |
| } |
| |
| @Override |
| public Map<String, String> next() { |
| if (nextRecord == null) { |
| throw new NoSuchElementException(); |
| } |
| |
| final Map<String, String> currentRecord = nextRecord; |
| nextRecord = parser.next(); |
| return currentRecord; |
| } |
| } |
| } |