| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| CSVStringEnumeration |
|
| 5.5;5.5 |
| 1 | /* | |
| 2 | * $Source: /usr/cvsroot/melati/melati/src/site/resources/withWebmacro/org.melati.util.CSVStringEnumeration.html,v $ | |
| 3 | * $Revision: 1.1 $ | |
| 4 | * | |
| 5 | * Copyright (C) 2001 William Chesters | |
| 6 | * | |
| 7 | * Part of Melati (http://melati.org), a framework for the rapid | |
| 8 | * development of clean, maintainable web applications. | |
| 9 | * | |
| 10 | * Melati is free software; Permission is granted to copy, distribute | |
| 11 | * and/or modify this software under the terms either: | |
| 12 | * | |
| 13 | * a) the GNU General Public License as published by the Free Software | |
| 14 | * Foundation; either version 2 of the License, or (at your option) | |
| 15 | * any later version, | |
| 16 | * | |
| 17 | * or | |
| 18 | * | |
| 19 | * b) any version of the Melati Software License, as published | |
| 20 | * at http://melati.org | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU General Public License and | |
| 23 | * the Melati Software License along with this program; | |
| 24 | * if not, write to the Free Software Foundation, Inc., | |
| 25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the | |
| 26 | * GNU General Public License and visit http://melati.org to obtain the | |
| 27 | * Melati Software License. | |
| 28 | * | |
| 29 | * Feel free to contact the Developers of Melati (http://melati.org), | |
| 30 | * if you would like to work out a different arrangement than the options | |
| 31 | * outlined here. It is our intention to allow Melati to be used by as | |
| 32 | * wide an audience as possible. | |
| 33 | * | |
| 34 | * This program is distributed in the hope that it will be useful, | |
| 35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 37 | * GNU General Public License for more details. | |
| 38 | * | |
| 39 | * Contact details for copyright holder: | |
| 40 | * | |
| 41 | * William Chesters <williamc At paneris.org> | |
| 42 | */ | |
| 43 | package org.melati.util; | |
| 44 | ||
| 45 | import java.util.Enumeration; | |
| 46 | import java.util.NoSuchElementException; | |
| 47 | ||
| 48 | /** | |
| 49 | * A utility for tokenising a string made up of comma-separated | |
| 50 | * variables. Unlike Tim's effort, it handles quoted variables as | |
| 51 | * well. | |
| 52 | * | |
| 53 | * <PRE> | |
| 54 | * foo, bar om,,"baz, ,oof",xyz, -> | |
| 55 | * "foo", " bar om", "", "baz, , oof", "xyz", "" | |
| 56 | * </PRE> | |
| 57 | * | |
| 58 | * @author williamc AT paneris.org | |
| 59 | */ | |
| 60 | ||
| 61 | 0 | public class CSVStringEnumeration implements Enumeration<String> { |
| 62 | ||
| 63 | 0 | private String line = ""; |
| 64 | 0 | private boolean emptyLastField = false; |
| 65 | 0 | int p = 0; |
| 66 | ||
| 67 | /** | |
| 68 | * Look at a new string. | |
| 69 | */ | |
| 70 | public void reset(String lineP) { | |
| 71 | 0 | this.line = lineP; |
| 72 | 0 | p = 0; |
| 73 | 0 | } |
| 74 | ||
| 75 | /** | |
| 76 | * Are there any more tokens to come? | |
| 77 | * {@inheritDoc} | |
| 78 | * @see java.util.Enumeration#hasMoreElements() | |
| 79 | */ | |
| 80 | public boolean hasMoreElements() { | |
| 81 | 0 | return emptyLastField || p < line.length(); |
| 82 | } | |
| 83 | ||
| 84 | /** | |
| 85 | * Return the next token as an <TT>Object</TT>. | |
| 86 | * {@inheritDoc} | |
| 87 | * @see java.util.Enumeration#nextElement() | |
| 88 | */ | |
| 89 | public final String nextElement() { | |
| 90 | 0 | return nextToken(); |
| 91 | } | |
| 92 | ||
| 93 | /** | |
| 94 | * @return the next token as a <TT>String</TT>. | |
| 95 | */ | |
| 96 | public String nextToken() { | |
| 97 | ||
| 98 | 0 | if (emptyLastField) { |
| 99 | 0 | emptyLastField = false; |
| 100 | 0 | return ""; |
| 101 | } | |
| 102 | ||
| 103 | 0 | if (p >= line.length()) throw new NoSuchElementException(); |
| 104 | ||
| 105 | 0 | if (line.charAt(p) == '"') { |
| 106 | 0 | ++p; |
| 107 | // we need to allow for quotes inside quoted fields, so now test for ", | |
| 108 | 0 | int q = line.indexOf("\",", p); |
| 109 | // if it is not there, we are (hopefully) at the end of a line | |
| 110 | 0 | if (q == -1 && (line.indexOf('"', p) == line.length()-1)) |
| 111 | 0 | q = line.length()-1; |
| 112 | ||
| 113 | 0 | if (q == -1) { |
| 114 | 0 | p = line.length(); |
| 115 | 0 | throw new IllegalArgumentException("Unclosed quotes"); |
| 116 | } | |
| 117 | ||
| 118 | 0 | String it = line.substring(p, q); |
| 119 | ||
| 120 | 0 | ++q; |
| 121 | 0 | p = q+1; |
| 122 | 0 | if (q < line.length()) { |
| 123 | 0 | if (line.charAt(q) != ',') { |
| 124 | 0 | p = line.length(); |
| 125 | 0 | throw new IllegalArgumentException("No comma after quotes"); |
| 126 | } | |
| 127 | 0 | else if (q == line.length() - 1) |
| 128 | 0 | emptyLastField = true; |
| 129 | } | |
| 130 | 0 | return it; |
| 131 | } else { | |
| 132 | 0 | int q = line.indexOf(',', p); |
| 133 | 0 | if (q == -1) { |
| 134 | 0 | String it = line.substring(p); |
| 135 | 0 | p = line.length(); |
| 136 | 0 | return it; |
| 137 | } else { | |
| 138 | 0 | String it = line.substring(p, q); |
| 139 | 0 | if (q == line.length() - 1) |
| 140 | 0 | emptyLastField = true; |
| 141 | 0 | p = q + 1; |
| 142 | 0 | return it; |
| 143 | } | |
| 144 | } | |
| 145 | } | |
| 146 | ||
| 147 | } |