1 /*
2 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * Additionally licensed with:
19 *
20 * Licensed under the Apache License, Version 2.0 (the "License");
21 * you may not use this file except in compliance with the License.
22 * You may obtain a copy of the License at
23 *
24 * http://www.apache.org/licenses/LICENSE-2.0
25 *
26 * Unless required by applicable law or agreed to in writing, software
27 * distributed under the License is distributed on an "AS IS" BASIS,
28 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
29 * See the License for the specific language governing permissions and
30 * limitations under the License.
31 */
32 package org.spf4j.io.csv;
33
34 import java.io.IOException;
35 import java.io.UncheckedIOException;
36 import java.util.Iterator;
37 import java.util.NoSuchElementException;
38
39 /**
40 * @author Zoltan Farkas
41 */
42 public final class OneRowIterator implements Iterator<CharSequence> {
43
44 private final CsvReader reader;
45 private CsvReader.TokenType next;
46
47 public OneRowIterator(final CsvReader reader) {
48 this.reader = reader;
49 }
50
51 private CsvReader.TokenType nextToken() {
52 try {
53 if (next == null) {
54 next = reader.next();
55 }
56 return next;
57 } catch (IOException ex) {
58 throw new UncheckedIOException(ex);
59 } catch (CsvParseException ex) {
60 throw new UncheckedCsvParseException(ex);
61 }
62 }
63
64 @Override
65 public boolean hasNext() {
66 return nextToken() == CsvReader.TokenType.ELEMENT;
67 }
68
69 @Override
70 public CharSequence next() {
71 if (hasNext()) {
72 next = null;
73 return reader.getElement();
74 } else {
75 throw new NoSuchElementException();
76 }
77 }
78
79 @Override
80 public String toString() {
81 return "OneRowIterator{" + "reader=" + reader + ", next=" + next + '}';
82 }
83
84 }