2 * Copyright (C) 2005 The Mir-coders group
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4 * This file is part of Mir.
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6 * Mir is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * Mir is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with Mir; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 * In addition, as a special exception, The Mir-coders gives permission to link
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21 * the code of this program with any library licensed under the Apache Software License,
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22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
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23 * (or with modified versions of the above that use the same license as the above),
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24 * and distribute linked combinations including the two. You must obey the
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25 * GNU General Public License in all respects for all of the code used other than
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26 * the above mentioned libraries. If you modify this file, you may extend this
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27 * exception to your version of the file, but you are not obligated to do so.
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28 * If you do not wish to do so, delete this exception statement from your version.
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30 package mir.storage;
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32 import java.sql.Connection;
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36 * Class to generate update statements
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38 public class RecordUpdater extends StatementGenerator{
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39 public RecordUpdater(String aTableName, String aRecordId) {
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40 tableName = aTableName;
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41 recordId = aRecordId;
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45 * Assigns a value to a string typed field
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47 public void assignString(String aFieldName, String aValue) {
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48 assignObject(aFieldName, aValue);
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52 * Assigns a value to a date/time typed field
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54 public void assignDateTime(String aFieldName, Date aDate) {
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55 assignObject(aFieldName, new java.sql.Timestamp(aDate.getTime()));
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59 * Assigns a verbatim value to a field. Use with case: no quoting/escaping
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62 public void assignVerbatim(String aFieldName, String aValue) {
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63 if (firstAssignment) {
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64 appendQuery("update " + tableName + " set ");
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65 firstAssignment = false;
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72 appendQuery(" " + aFieldName + " = " + aValue);
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76 * Executes the statement. Returns then number of records
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79 public int execute(Connection aConnection) throws DatabaseFailure {
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81 appendQuery("where id = ?");
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82 appendParameter(recordId);
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84 return executeWithModifiedCount(aConnection);
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87 private void assignObject(String aFieldName, Object anObject) {
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88 appendParameter(anObject);
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89 assignVerbatim(aFieldName, "?");
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92 private String tableName;
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93 private static final String CRLF = "\n\r";
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94 private String recordId;
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95 private boolean firstAssignment = true;
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