1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.surefire.api.util.internal;
20
21 import java.util.StringTokenizer;
22
23 import static java.lang.System.lineSeparator;
24
25 /**
26 * <p>
27 * Common {@link String java.lang.String} manipulation routines.
28 * </p>
29 * <br>
30 * <p>
31 * Originally from <a href="http://jakarta.apache.org/turbine/">Turbine</a> and the GenerationJavaCore library.
32 * </p>
33 * <br>
34 * NOTE: This class is not part of any api and is public purely for technical reasons !
35 *
36 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
37 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
38 * @author <a href="mailto:gcoladonato@yahoo.com">Greg Coladonato</a>
39 * @author <a href="mailto:bayard@generationjava.com">Henri Yandell</a>
40 * @author <a href="mailto:ed@codehaus.org">Ed Korthof</a>
41 * @author <a href="mailto:rand_mcneely@yahoo.com">Rand McNeely</a>
42 * @author Stephen Colebourne
43 * @author <a href="mailto:fredrik@westermarck.com">Fredrik Westermarck</a>
44 * @author Holger Krauth
45 * @author <a href="mailto:alex@purpletech.com">Alexander Day Chaffee</a>
46 * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
47 * @version $Id: StringUtils.java 8001 2009-01-03 13:17:09Z vsiveton $
48 * @since 1.0
49 */
50 public final class StringUtils {
51 public static final String NL = lineSeparator();
52
53 private StringUtils() {
54 throw new IllegalStateException("no instantiable constructor");
55 }
56
57 public static String[] split(String text, String separator) {
58 final StringTokenizer tok;
59 if (separator == null) {
60 // Null separator means we're using StringTokenizer's default
61 // delimiter, which comprises all whitespace characters.
62 tok = new StringTokenizer(text);
63 } else {
64 tok = new StringTokenizer(text, separator);
65 }
66
67 String[] list = new String[tok.countTokens()];
68 for (int i = 0; tok.hasMoreTokens(); i++) {
69 list[i] = tok.nextToken();
70 }
71 return list;
72 }
73
74 /**
75 * Determines if {@code buffer} starts with specific literal(s).
76 *
77 * @param buffer Examined StringBuffer
78 * @param pattern a pattern which should start in {@code buffer}
79 * @return {@code true} if buffer's literal starts with given {@code pattern}, or both are empty.
80 */
81 public static boolean startsWith(StringBuffer buffer, String pattern) {
82 if (buffer.length() < pattern.length()) {
83 return false;
84 } else {
85 for (int i = 0, len = pattern.length(); i < len; i++) {
86 if (buffer.charAt(i) != pattern.charAt(i)) {
87 return false;
88 }
89 }
90 return true;
91 }
92 }
93 }