1 /*
2 * Copyright 2007 Kasper B. Graversen
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.supercsv.cellprocessor;
17
18 import org.supercsv.cellprocessor.ift.LongCellProcessor;
19 import org.supercsv.cellprocessor.ift.StringCellProcessor;
20 import org.supercsv.exception.SuperCsvCellProcessorException;
21 import org.supercsv.util.CsvContext;
22
23 /**
24 * Converts a String to a Long.
25 *
26 * @author Kasper B. Graversen
27 */
28 public class ParseLong extends CellProcessorAdaptor implements StringCellProcessor {
29
30 /**
31 * Constructs a new <tt>ParseLong</tt> processor, which converts a String to a Long.
32 */
33 public ParseLong() {
34 super();
35 }
36
37 /**
38 * Constructs a new <tt>ParseLong</tt> processor, which converts a String to a Long, then calls the next processor
39 * in the chain.
40 *
41 * @param next
42 * the next processor in the chain
43 * @throws NullPointerException
44 * if next is null
45 */
46 public ParseLong(final LongCellProcessor next) {
47 super(next);
48 }
49
50 /**
51 * {@inheritDoc}
52 *
53 * @throws SuperCsvCellProcessorException
54 * if value is null, isn't a Long or String, or can't be parsed as a Long
55 */
56 public Object execute(final Object value, final CsvContext context) {
57 validateInputNotNull(value, context);
58
59 final Long result;
60 if( value instanceof Long ) {
61 result = (Long) value;
62 } else if( value instanceof String ) {
63 try {
64 result = Long.parseLong((String) value);
65 }
66 catch(final NumberFormatException e) {
67 throw new SuperCsvCellProcessorException(String.format("'%s' could not be parsed as an Long", value),
68 context, this, e);
69 }
70 } else {
71 final String actualClassName = value.getClass().getName();
72 throw new SuperCsvCellProcessorException(String.format(
73 "the input value should be of type Long or String but is of type %s", actualClassName), context, this);
74 }
75
76 return next.execute(result, context);
77 }
78 }