001: /*
002: * ====================================================================
003: * JAFFA - Java Application Framework For All
004: *
005: * Copyright (C) 2002 JAFFA Development Group
006: *
007: * This library is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU Lesser General Public
009: * License as published by the Free Software Foundation; either
010: * version 2.1 of the License, or (at your option) any later version.
011: *
012: * This library 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 GNU
015: * Lesser General Public License for more details.
016: *
017: * You should have received a copy of the GNU Lesser General Public
018: * License along with this library; if not, write to the Free Software
019: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020: *
021: * Redistribution and use of this software and associated documentation ("Software"),
022: * with or without modification, are permitted provided that the following conditions are met:
023: * 1. Redistributions of source code must retain copyright statements and notices.
024: * Redistributions must also contain a copy of this document.
025: * 2. Redistributions in binary form must reproduce the above copyright notice,
026: * this list of conditions and the following disclaimer in the documentation
027: * and/or other materials provided with the distribution.
028: * 3. The name "JAFFA" must not be used to endorse or promote products derived from
029: * this Software without prior written permission. For written permission,
030: * please contact mail to: jaffagroup@yahoo.com.
031: * 4. Products derived from this Software may not be called "JAFFA" nor may "JAFFA"
032: * appear in their names without prior written permission.
033: * 5. Due credit should be given to the JAFFA Project (http://jaffa.sourceforge.net).
034: *
035: * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: */
049:
050: package org.jaffa.util;
051:
052: /** This class splits a String based on a separator. It then sets the prefix and suffix.
053: */
054: public class SplitString {
055: private String pre = null;
056: private String post = null;
057: private boolean split = false;
058:
059: /** Creates an instance with the source String and separator. The source String will be split based on the separator.
060: * This a short hand version of <code>SplitString(source, separator, true)</code>
061: * @param source The source String.
062: * @param separator The separator used for splitting the source String.
063: */
064: public SplitString(String source, String separator) {
065: this (source, separator, true);
066: }
067:
068: /** Creates an instance with the source String and separator. The source String will be split based on the separator.
069: * @param source The source String.
070: * @param separator The separator used for splitting the source String.
071: * @param findFirst If true splits based on first occurence of seperator, if false
072: * split is done on the last occurence.
073: */
074: public SplitString(String source, String separator,
075: boolean findFirst) {
076: int i;
077: if (findFirst)
078: i = source.indexOf(separator);
079: else
080: i = source.lastIndexOf(separator);
081: if (i == -1) {
082: // Not found
083: pre = source;
084: post = null;
085: } else {
086: // Found
087: split = true;
088: if (i == 0) {
089: // Found at start of string
090: pre = null;
091: // Extract data after separator
092: post = source.substring(separator.length());
093: } else {
094: // Found in middle
095: // Extract Start
096: pre = source.substring(0, i);
097: if (i + separator.length() >= source.length())
098: // Found at end :-(
099: post = null;
100: else
101: post = source.substring(i + separator.length());
102: }
103: }
104: }
105:
106: /** The definition of a valid split is one where either there was
107: * no split in the string, or the splitter resulted in two new
108: * strings. (i.e the separator should not start or end the string)
109: * @return a true if the split is valid.
110: */
111: public boolean isValid() {
112: return (!split || (split && pre != null && post != null));
113: }
114:
115: /** Returns the prefix String that was created as a result of the split.
116: * @return the prefix String that was created as a result of the split.
117: */
118: public String getPrefix() {
119: return pre;
120: }
121:
122: /** Returns the suffix String that was created as a result of the split.
123: * @return the suffix String that was created as a result of the split.
124: */
125: public String getSuffix() {
126: return post;
127: }
128: }
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