2 * Copyright (C) 2001-2006 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 * and distribute linked combinations including the two. You must obey the
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23 * GNU General Public License in all respects for all of the code used other than
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24 * the above mentioned libraries. If you modify this file, you may extend this
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25 * exception to your version of the file, but you are not obligated to do so.
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26 * If you do not wish to do so, delete this exception statement from your version.
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28 package mir.storage;
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30 import java.sql.Connection;
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34 * Class to generate update statements
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36 public class RecordUpdater extends StatementGenerator{
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37 public RecordUpdater(String aTableName, String aRecordId) {
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38 tableName = aTableName;
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39 recordId = aRecordId;
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43 * Assigns a value to a string typed field
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45 public void assignString(String aFieldName, String aValue) {
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46 assignObject(aFieldName, aValue);
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50 * Assigns a value to a date/time typed field
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52 public void assignDateTime(String aFieldName, Date aDate) {
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53 assignObject(aFieldName, new java.sql.Timestamp(aDate.getTime()));
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57 * Assigns a verbatim value to a field. Use with case: no quoting/escaping
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60 public void assignVerbatim(String aFieldName, String aValue) {
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61 if (firstAssignment) {
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62 appendQuery("update " + tableName + " set ");
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63 firstAssignment = false;
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70 appendQuery(" " + aFieldName + " = " + aValue);
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74 * Executes the statement. Returns then number of records
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77 public int execute(Connection aConnection) throws DatabaseFailure {
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79 appendQuery("where id = ?");
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80 appendParameter(recordId);
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82 return executeWithModifiedCount(aConnection);
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85 private void assignObject(String aFieldName, Object anObject) {
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86 appendParameter(anObject);
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87 assignVerbatim(aFieldName, "?");
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90 private String tableName;
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91 private static final String CRLF = "\n\r";
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92 private String recordId;
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93 private boolean firstAssignment = true;
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