Class StringUtil

1	/*
2	* Copyright (c) 2016 Vivid Solutions.
3	*
4	* All rights reserved. This program and the accompanying materials
5	* are made available under the terms of the Eclipse Public License 2.0
6	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
7	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
8	* and the Eclipse Distribution License is available at
9	*
10	* http://www.eclipse.org/org/documents/edl-v10.php.
11	*/
12
13	package org.locationtech.jts.util;
14
15	import java.io.ByteArrayOutputStream;
16	import java.io.IOException;
17	import java.io.LineNumberReader;
18	import java.io.PrintStream;
19	import java.io.StringReader;
20	import java.text.DecimalFormat;
21	import java.text.NumberFormat;
22	import java.util.ArrayList;
23
24	import org.locationtech.jts.io.OrdinateFormat;
25
26	/**
27	* Utility methods for working with {@link String}s.
28	*
29	* @author Martin Davis
30	*
31	*/
32	public class StringUtil
33	{
34	/**
35	* Mimics the the Java SE {@link String#split(String)} method.
36	*
37	* @param s the string to split.
38	* @param separator the separator to use.
39	* @return the array of split strings.
40	*/
41	public static String[] split(String s, String separator)
42	{
43	int separatorlen = separator.length();
44	ArrayList tokenList = new ArrayList();
45	String tmpString = "" + s;
46	int pos = tmpString.indexOf(separator);
47	while (pos >= 0) {
48	String token = tmpString.substring(0, pos);
49	tokenList.add(token);
50	tmpString = tmpString.substring(pos + separatorlen);
51	pos = tmpString.indexOf(separator);
52	}
53	if (tmpString.length() > 0)
54	tokenList.add(tmpString);
55	String[] res = new String[tokenList.size()];
56	for (int i = 0; i < res.length; i++) {
57	res[i] = (String) tokenList.get(i);
58	}
59	return res;
60	}
61
62	public final static String NEWLINE = System.getProperty("line.separator");
63
64	/**
65	* Returns an throwable's stack trace
66	*/
67	public static String getStackTrace(Throwable t) {
68	ByteArrayOutputStream os = new ByteArrayOutputStream();
69	PrintStream ps = new PrintStream(os);
70	t.printStackTrace(ps);
71	return os.toString();
72	}
73
74	public static String getStackTrace(Throwable t, int depth) {
75	String stackTrace = "";
76	StringReader stringReader = new StringReader(getStackTrace(t));
77	LineNumberReader lineNumberReader = new LineNumberReader(stringReader);
78	for (int i = 0; i < depth; i++) {
79	try {
80	stackTrace += lineNumberReader.readLine() + NEWLINE;
81	} catch (IOException e) {
82	Assert.shouldNeverReachHere();
83	}
84	}
85	return stackTrace;
86	}
87
88	/**
89	* Returns a string representation of the given number,
90	* using a format compatible with WKT.
91	*
92	* @param d a number
93	* @return a string
94	*
95	* @deprecated use {@link OrdinateFormat}
96	*/
97	public static String toString(double d) {
98	return OrdinateFormat.DEFAULT.format(d);
99	}
100
101	public static String spaces(int n)
102	{
103	return chars(' ', n);
104	}
105
106	public static String chars(char c, int n)
107	{
108	char[] ch = new char[n];
109	for (int i = 0; i < n; i++) {
110	ch[i] = c;
111	}
112	return new String(ch);
113	}
114	}
115