| 1 | /* |
| 2 | Copyright (C) 2002-2004 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of version 2 of the GNU General Public License as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | There are special exceptions to the terms and conditions of the GPL |
| 9 | as it is applied to this software. View the full text of the |
| 10 | exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
| 11 | software distribution. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | |
| 22 | |
| 23 | |
| 24 | */ |
| 25 | package com.mysql.jdbc; |
| 26 | |
| 27 | import java.util.ArrayList; |
| 28 | import java.util.List; |
| 29 | |
| 30 | /** |
| 31 | * Represents an in-memory result set |
| 32 | * |
| 33 | * @author dgan |
| 34 | * @version $Id: RowDataStatic.java 3726 2005-05-19 15:52:24Z mmatthews $ |
| 35 | */ |
| 36 | public class RowDataStatic implements RowData { |
| 37 | private int index; |
| 38 | |
| 39 | ResultSet owner; |
| 40 | |
| 41 | private List rows; |
| 42 | |
| 43 | /** |
| 44 | * Creates a new RowDataStatic object. |
| 45 | * |
| 46 | * @param rows |
| 47 | * DOCUMENT ME! |
| 48 | */ |
| 49 | public RowDataStatic(ArrayList rows) { |
| 50 | this.index = -1; |
| 51 | this.rows = rows; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * DOCUMENT ME! |
| 56 | * |
| 57 | * @param row |
| 58 | * DOCUMENT ME! |
| 59 | */ |
| 60 | public void addRow(byte[][] row) { |
| 61 | this.rows.add(row); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Moves to after last. |
| 66 | */ |
| 67 | public void afterLast() { |
| 68 | this.index = this.rows.size(); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Moves to before first. |
| 73 | */ |
| 74 | public void beforeFirst() { |
| 75 | this.index = -1; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * DOCUMENT ME! |
| 80 | */ |
| 81 | public void beforeLast() { |
| 82 | this.index = this.rows.size() - 2; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * DOCUMENT ME! |
| 87 | */ |
| 88 | public void close() { |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * DOCUMENT ME! |
| 93 | * |
| 94 | * @param atIndex |
| 95 | * DOCUMENT ME! |
| 96 | * |
| 97 | * @return DOCUMENT ME! |
| 98 | */ |
| 99 | public Object[] getAt(int atIndex) { |
| 100 | if ((atIndex < 0) || (atIndex >= this.rows.size())) { |
| 101 | return null; |
| 102 | } |
| 103 | |
| 104 | return (Object[]) this.rows.get(atIndex); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * DOCUMENT ME! |
| 109 | * |
| 110 | * @return DOCUMENT ME! |
| 111 | */ |
| 112 | public int getCurrentRowNumber() { |
| 113 | return this.index; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * @see com.mysql.jdbc.RowData#getOwner() |
| 118 | */ |
| 119 | public ResultSet getOwner() { |
| 120 | return this.owner; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * DOCUMENT ME! |
| 125 | * |
| 126 | * @return DOCUMENT ME! |
| 127 | */ |
| 128 | public boolean hasNext() { |
| 129 | boolean hasMore = (this.index + 1) < this.rows.size(); |
| 130 | |
| 131 | return hasMore; |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Returns true if we got the last element. |
| 136 | * |
| 137 | * @return DOCUMENT ME! |
| 138 | */ |
| 139 | public boolean isAfterLast() { |
| 140 | return this.index >= this.rows.size(); |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Returns if iteration has not occured yet. |
| 145 | * |
| 146 | * @return DOCUMENT ME! |
| 147 | */ |
| 148 | public boolean isBeforeFirst() { |
| 149 | return (this.index == -1) && (this.rows.size() != 0); |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * DOCUMENT ME! |
| 154 | * |
| 155 | * @return DOCUMENT ME! |
| 156 | */ |
| 157 | public boolean isDynamic() { |
| 158 | return false; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * DOCUMENT ME! |
| 163 | * |
| 164 | * @return DOCUMENT ME! |
| 165 | */ |
| 166 | public boolean isEmpty() { |
| 167 | return this.rows.size() == 0; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * DOCUMENT ME! |
| 172 | * |
| 173 | * @return DOCUMENT ME! |
| 174 | */ |
| 175 | public boolean isFirst() { |
| 176 | return this.index == 0; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * DOCUMENT ME! |
| 181 | * |
| 182 | * @return DOCUMENT ME! |
| 183 | */ |
| 184 | public boolean isLast() { |
| 185 | // |
| 186 | // You can never be on the 'last' row of |
| 187 | // an empty result set |
| 188 | // |
| 189 | if (this.rows.size() == 0) { |
| 190 | return false; |
| 191 | } |
| 192 | |
| 193 | return (this.index == (this.rows.size() - 1)); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * DOCUMENT ME! |
| 198 | * |
| 199 | * @param rows |
| 200 | * DOCUMENT ME! |
| 201 | */ |
| 202 | public void moveRowRelative(int rowsToMove) { |
| 203 | this.index += rowsToMove; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * DOCUMENT ME! |
| 208 | * |
| 209 | * @return DOCUMENT ME! |
| 210 | */ |
| 211 | public Object[] next() { |
| 212 | this.index++; |
| 213 | |
| 214 | if (this.index < this.rows.size()) { |
| 215 | return (Object[]) this.rows.get(this.index); |
| 216 | } |
| 217 | |
| 218 | return null; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * DOCUMENT ME! |
| 223 | * |
| 224 | * @param atIndex |
| 225 | * DOCUMENT ME! |
| 226 | */ |
| 227 | public void removeRow(int atIndex) { |
| 228 | this.rows.remove(atIndex); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * DOCUMENT ME! |
| 233 | * |
| 234 | * @param newIndex |
| 235 | * DOCUMENT ME! |
| 236 | */ |
| 237 | public void setCurrentRow(int newIndex) { |
| 238 | this.index = newIndex; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * @see com.mysql.jdbc.RowData#setOwner(com.mysql.jdbc.ResultSet) |
| 243 | */ |
| 244 | public void setOwner(ResultSet rs) { |
| 245 | this.owner = rs; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * DOCUMENT ME! |
| 250 | * |
| 251 | * @return DOCUMENT ME! |
| 252 | */ |
| 253 | public int size() { |
| 254 | return this.rows.size(); |
| 255 | } |
| 256 | } |