Source Code Cross Referenced for StringUtil.java in  » GIS » openjump » com » vividsolutions » jump » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » openjump » com.vividsolutions.jump.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
003:         * for visualizing and manipulating spatial features with geometry and attributes.
004:         *
005:         * Copyright (C) 2003 Vivid Solutions
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License
009:         * as published by the Free Software Foundation; either version 2
010:         * of the License, or (at your option) any later version.
011:         *
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015:         * GNU General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU General Public License
018:         * along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020:         *
021:         * For more information, contact:
022:         *
023:         * Vivid Solutions
024:         * Suite #1A
025:         * 2328 Government Street
026:         * Victoria BC  V8T 5G5
027:         * Canada
028:         *
029:         * (250)385-6040
030:         * www.vividsolutions.com
031:         */
032:        package com.vividsolutions.jump.util;
033:
034:        import java.io.ByteArrayOutputStream;
035:        import java.io.PrintStream;
036:        import java.util.ArrayList;
037:        import java.util.Collection;
038:        import java.util.Iterator;
039:        import java.util.List;
040:        import java.util.StringTokenizer;
041:
042:        import com.vividsolutions.jts.util.Assert;
043:
044:        /**
045:         * Useful String-related utilities.
046:         */
047:        public class StringUtil {
048:
049:            /**
050:             * Warning: hinders internationalization
051:             */
052:            public static String s(int n) {
053:                return (n != 1) ? "s" : "";
054:            }
055:
056:            /**
057:             * Warning: hinders internationalization
058:             */
059:            public static String ies(int n) {
060:                return (n != 1) ? "ies" : "y";
061:            }
062:
063:            public static String substitute(String string,
064:                    Object[] substitutions) {
065:                for (int i = 0; i < substitutions.length; i++) {
066:                    string = StringUtil.replaceAll(string, "$" + (i + 1),
067:                            substitutions[i].toString());
068:                }
069:                return string;
070:            }
071:
072:            public static String classNameWithoutQualifiers(String className) {
073:                return className.substring(Math.max(className.lastIndexOf("."),
074:                        className.lastIndexOf("$")) + 1);
075:            }
076:
077:            public static String classNameWithoutPackageQualifiers(
078:                    String className) {
079:                return className.substring(className.lastIndexOf(".") + 1);
080:            }
081:
082:            public static String repeat(char c, int n) {
083:                StringBuffer b = new StringBuffer();
084:
085:                for (int i = 0; i < n; i++) {
086:                    b.append(c);
087:                }
088:
089:                return b.toString();
090:            }
091:
092:            /**
093:             *  Line-wraps s by inserting a newline instead of the first space after the nth
094:             *  column. Word-wraps.
095:             */
096:            public static String split(String s, int n) {
097:                StringBuffer b = new StringBuffer();
098:                boolean wrapPending = false;
099:
100:                for (int i = 0; i < s.length(); i++) {
101:                    if (((i % n) == 0) && (i > 0)) {
102:                        wrapPending = true;
103:                    }
104:
105:                    char c = s.charAt(i);
106:
107:                    if (wrapPending && (c == ' ')) {
108:                        b.append("\n");
109:                        wrapPending = false;
110:                    } else {
111:                        b.append(c);
112:                    }
113:                }
114:
115:                return b.toString();
116:            }
117:
118:            public static String capitalize(String word) {
119:                if (word.length() == 0) {
120:                    return word;
121:                }
122:
123:                return (word.charAt(0) + "").toUpperCase() + word.substring(1);
124:            }
125:
126:            public static String uncapitalize(String word) {
127:                if (word.length() == 0) {
128:                    return word;
129:                }
130:
131:                return (word.charAt(0) + "").toLowerCase() + word.substring(1);
132:            }
133:
134:            /**
135:             * Converts the comma-delimited string into a List of trimmed strings.
136:             * @param s a String with comma-delimited values
137:             * @return a List of the Strings that were delimited by commas
138:             */
139:            public static List fromCommaDelimitedString(String s) {
140:                if (s.trim().length() == 0) {
141:                    return new ArrayList();
142:                }
143:                ArrayList result = new ArrayList();
144:                StringTokenizer tokenizer = new StringTokenizer(s, ",");
145:
146:                while (tokenizer.hasMoreTokens()) {
147:                    result.add(tokenizer.nextToken().toString().trim());
148:                }
149:
150:                return result;
151:            }
152:
153:            /**
154:             * Returns a List of empty Strings.
155:             * @param size the size of the List to create
156:             * @return a List of blank Strings
157:             */
158:            public static List blankStringList(int size) {
159:                ArrayList list = new ArrayList();
160:
161:                for (int i = 0; i < size; i++) {
162:                    list.add("");
163:                }
164:
165:                return list;
166:            }
167:
168:            public static String toFriendlyName(String className) {
169:                return toFriendlyName(className, null);
170:            }
171:
172:            public static String friendlyName(Class c) {
173:                return toFriendlyName(c.getName());
174:            }
175:
176:            public static String toFriendlyName(String className,
177:                    String substringToRemove) {
178:                String name = className;
179:
180:                //Remove substring sooner rather than later because, for example,
181:                //?"PlugIn" will become "Plug In". [Jon Aquino]
182:                if (substringToRemove != null) {
183:                    name = StringUtil.replaceAll(name, substringToRemove, "");
184:                }
185:
186:                name = StringUtil.classNameWithoutQualifiers(name);
187:                name = insertSpaces(name);
188:
189:                return name;
190:            }
191:
192:            public static String insertSpaces(String s) {
193:                if (s.length() < 2) {
194:                    return s;
195:                }
196:
197:                String result = "";
198:
199:                for (int i = 0; i < (s.length() - 2); i++) { //-2
200:                    result += s.charAt(i);
201:
202:                    if ((Character.isLowerCase(s.charAt(i)) && Character
203:                            .isUpperCase(s.charAt(i + 1)))
204:                            || (Character.isUpperCase(s.charAt(i + 1)) && Character
205:                                    .isLowerCase(s.charAt(i + 2)))) {
206:                        result += " ";
207:                    }
208:                }
209:
210:                result += s.charAt(s.length() - 2);
211:                result += s.charAt(s.length() - 1);
212:
213:                return result.trim();
214:            }
215:
216:            /**
217:             * Returns the elements of c separated by commas. If c is empty, an empty
218:             * String will be returned.
219:             * @param c a Collection of objects to convert to Strings and delimit by commas
220:             * @return a String containing c's elements, delimited by commas
221:             */
222:            public static String toCommaDelimitedString(Collection c) {
223:                return toDelimitedString(c, ", ");
224:            }
225:
226:            /**
227:             *  Returns original with all occurrences of oldSubstring replaced by
228:             *  newSubstring
229:             */
230:            public static String replaceAll(String original,
231:                    String oldSubstring, String newSubstring) {
232:                return replace(original, oldSubstring, newSubstring, true);
233:            }
234:
235:            /**
236:             *  Returns original with occurrences of oldSubstring replaced by
237:             *  newSubstring. Set all to true to replace all occurrences, or false to
238:             *  replace the first occurrence only.
239:             */
240:            public static String replace(String original, String oldSubstring,
241:                    String newSubstring, boolean all) {
242:                StringBuffer b = new StringBuffer(original);
243:                replace(b, oldSubstring, newSubstring, all);
244:
245:                return b.toString();
246:            }
247:
248:            /**
249:             *  Replaces all instances of the String o with the String n in the
250:             *  StringBuffer orig if all is true, or only the first instance if all is
251:             *  false. Posted by Steve Chapel <schapel@breakthr.com> on UseNet
252:             */
253:            public static void replace(StringBuffer orig, String o, String n,
254:                    boolean all) {
255:                if ((orig == null) || (o == null) || (o.length() == 0)
256:                        || (n == null)) {
257:                    throw new IllegalArgumentException(
258:                            "Null or zero-length String");
259:                }
260:
261:                int i = 0;
262:
263:                while ((i + o.length()) <= orig.length()) {
264:                    if (orig.substring(i, i + o.length()).equals(o)) {
265:                        orig.replace(i, i + o.length(), n);
266:
267:                        if (!all) {
268:                            break;
269:                        } else {
270:                            i += n.length();
271:                        }
272:                    } else {
273:                        i++;
274:                    }
275:                }
276:            }
277:
278:            /**
279:             * Returns an throwable's stack trace
280:             */
281:            public static String stackTrace(Throwable t) {
282:                ByteArrayOutputStream os = new ByteArrayOutputStream();
283:                PrintStream ps = new PrintStream(os);
284:                t.printStackTrace(ps);
285:
286:                return os.toString();
287:            }
288:
289:            public static String head(String s, int lines) {
290:                int newlinesEncountered = 0;
291:                for (int i = 0; i < s.length(); i++) {
292:                    if (s.charAt(i) == '\n') {
293:                        newlinesEncountered++;
294:                        if (newlinesEncountered == lines) {
295:                            return s.substring(0, i);
296:                        }
297:                    }
298:                }
299:                return s;
300:            }
301:
302:            public static String limitLength(String s, int maxLength) {
303:                Assert.isTrue(maxLength >= 3);
304:
305:                if (s == null) {
306:                    return null;
307:                }
308:
309:                if (s.length() > maxLength) {
310:                    return s.substring(0, maxLength - 3) + "...";
311:                }
312:
313:                return s;
314:            }
315:
316:            public static boolean isNumber(String token) {
317:                try {
318:                    Double.parseDouble(token);
319:
320:                    return true;
321:                } catch (NumberFormatException e) {
322:                    return false;
323:                }
324:            }
325:
326:            public static String toDelimitedString(Collection c,
327:                    String delimiter) {
328:                if (c.isEmpty()) {
329:                    return "";
330:                }
331:
332:                StringBuffer result = new StringBuffer();
333:
334:                for (Iterator i = c.iterator(); i.hasNext();) {
335:                    Object o = i.next();
336:                    result
337:                            .append(delimiter
338:                                    + ((o == null) ? "" : o.toString()));
339:                }
340:
341:                return result.substring(delimiter.length());
342:            }
343:
344:            public static String toTimeString(long milliseconds) {
345:                long remainder = milliseconds;
346:                long days = remainder / 86400000;
347:                remainder = remainder % 86400000;
348:
349:                long hours = remainder / 3600000;
350:                remainder = remainder % 3600000;
351:
352:                long minutes = remainder / 60000;
353:                remainder = remainder % 60000;
354:
355:                long seconds = remainder / 1000;
356:                String s = "";
357:
358:                if (days > 0) {
359:                    s += (days + " days ");
360:                }
361:
362:                s += (Fmt.fmt(hours, 2, Fmt.ZF) + ":"
363:                        + Fmt.fmt(minutes, 2, Fmt.ZF) + ":" + Fmt.fmt(seconds,
364:                        2, Fmt.ZF));
365:
366:                return s;
367:            }
368:
369:            public static boolean isEmpty(String value) {
370:                return (value == null || value.trim().length() == 0);
371:            }
372:        }
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