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.comment;
17
18 /**
19 * CommentMatcher that matches lines that begin with a specified String.
20 */
21 public class CommentStartsWith implements CommentMatcher {
22
23 private final String value;
24
25 /**
26 * Constructs a new <tt>CommentStartsWith</tt> comment matcher.
27 *
28 * @param value
29 * the String a line must start with to be a comment
30 * @throws NullPointerException
31 * if value is null
32 * @throws IllegalArgumentException
33 * if value is empty
34 */
35 public CommentStartsWith(final String value) {
36 if( value == null ) {
37 throw new NullPointerException("value should not be null");
38 } else if( value.length() == 0 ) {
39 throw new IllegalArgumentException("value should not be empty");
40 }
41 this.value = value;
42 }
43
44 /**
45 * {@inheritDoc}
46 */
47 public boolean isComment(String line) {
48 return line.startsWith(value);
49 }
50
51 }