1 /*
2 * Copyright (C) 2007-2012 Argeo GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.argeo.util;
17
18 import java.util.HashMap;
19 import java.util.List;
20 import java.util.Map;
21
22 /**
23 * CSV parser allowing to process lines as maps whose keys are the header
24 * fields.
25 */
26 public abstract class CsvParserWithLinesAsMap extends CsvParser {
27
28 /**
29 * Actually processes a line.
30 *
31 * @param lineNumber
32 * the current line number, starts at 1 (the header, if header
33 * processing is enabled, the first lien otherwise)
34 * @param line
35 * the parsed tokens as a map whose keys are the header fields
36 */
37 protected abstract void processLine(Integer lineNumber,
38 Map<String, String> line);
39
40 protected final void processLine(Integer lineNumber, List<String> header,
41 List<String> tokens) {
42 if (header == null)
43 throw new UtilsException("Only CSV with header is supported");
44 Map<String, String> line = new HashMap<String, String>();
45 for (int i = 0; i < header.size(); i++) {
46 String key = header.get(i);
47 String value = null;
48 if (i < tokens.size())
49 value = tokens.get(i);
50 line.put(key, value);
51 }
52 processLine(lineNumber, line);
53 }
54
55 }