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.EOFException;
35 import java.util.Iterator;
36
37 /**
38 *
39 * @author Zoltan Farkas
40 */
41 class IterableCsvReader implements CsvReader {
42
43 private CsvReader.TokenType currentToken;
44 private CharSequence current;
45 private final Iterator<? extends CharSequence> it;
46 private boolean finished;
47
48 IterableCsvReader(final Iterator<? extends CharSequence> it) {
49 this.it = it;
50 current = null;
51 finished = false;
52 currentToken = TokenType.START_DOCUMENT;
53 }
54
55 @Override
56 public CsvReader.TokenType next() throws EOFException {
57 if (finished) {
58 currentToken = CsvReader.TokenType.END_DOCUMENT;
59 return currentToken;
60 }
61 if (it.hasNext()) {
62 current = it.next();
63 currentToken = CsvReader.TokenType.ELEMENT;
64 } else {
65 finished = true;
66 currentToken = CsvReader.TokenType.END_ROW;
67 }
68 return currentToken;
69 }
70
71 @Override
72 public CsvReader.TokenType current() {
73 return currentToken;
74 }
75
76 @Override
77 public CharSequence getElement() {
78 if (currentToken != TokenType.ELEMENT) {
79 throw new IllegalStateException("Not at a element " + currentToken);
80 }
81 return current;
82 }
83
84 @Override
85 public String toString() {
86 return "IterableCsvReader{" + "current=" + current + ", it=" + it + ", finished=" + finished + '}';
87 }
88
89 @Override
90 public long currentLineNumber() {
91 return 0;
92 }
93
94 }