merged 1.1 branch into head

[mir.git] / source / mir / storage / RecordUpdater.java

diff --git a/source/mir/storage/RecordUpdater.java b/source/mir/storage/RecordUpdater.java
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+++ b/source/mir/storage/RecordUpdater.java
@@ -0,0 +1,94 @@
+/*\r
+ * Copyright (C) 2001-2006 The Mir-coders group\r
+ *\r
+ * This file is part of Mir.\r
+ *\r
+ * Mir is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ *\r
+ * Mir is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with Mir; if not, write to the Free Software\r
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
+ *\r
+ * In addition, as a special exception, The Mir-coders gives permission to link\r
+ * the code of this program with  any library licensed under the Apache Software License,\r
+ * and distribute linked combinations including the two.  You must obey the\r
+ * GNU General Public License in all respects for all of the code used other than\r
+ * the above mentioned libraries.  If you modify this file, you may extend this\r
+ * exception to your version of the file, but you are not obligated to do so.\r
+ * If you do not wish to do so, delete this exception statement from your version.\r
+ */\r
+package mir.storage;\r
+\r
+import java.sql.Connection;\r
+import java.util.*;\r
+\r
+/**\r
+ * Class to generate update statements\r
+ */\r
+public class RecordUpdater extends StatementGenerator{\r
+  public RecordUpdater(String aTableName, String aRecordId) {\r
+    tableName = aTableName;\r
+    recordId = aRecordId;\r
+  }\r
+\r
+  /**\r
+   * Assigns a value to a string typed field\r
+   */\r
+  public void assignString(String aFieldName, String aValue) {\r
+    assignObject(aFieldName, aValue);\r
+  }\r
+\r
+  /**\r
+   * Assigns a value to a date/time typed field\r
+   */\r
+  public void assignDateTime(String aFieldName, Date aDate) {\r
+    assignObject(aFieldName, new java.sql.Timestamp(aDate.getTime()));\r
+  }\r
+\r
+  /**\r
+   * Assigns a verbatim value to a field. Use with case: no quoting/escaping\r
+   * will be performed\r
+   **/\r
+  public void assignVerbatim(String aFieldName, String aValue) {\r
+    if (firstAssignment) {\r
+      appendQuery("update " + tableName + " set ");\r
+      firstAssignment = false;\r
+    }\r
+    else {\r
+      appendQuery(",");\r
+    }\r
+\r
+    appendQuery(CRLF);\r
+    appendQuery("  " + aFieldName + " = " + aValue);\r
+  }\r
+\r
+  /**\r
+   * Executes the statement. Returns then number of records\r
+   * changed\r
+   */\r
+  public int execute(Connection aConnection) throws DatabaseFailure {\r
+    appendQuery(CRLF);\r
+    appendQuery("where id = ?");\r
+    appendParameter(recordId);\r
+\r
+    return executeWithModifiedCount(aConnection);\r
+  }\r
+\r
+  private void assignObject(String aFieldName, Object anObject) {\r
+    appendParameter(anObject);\r
+    assignVerbatim(aFieldName, "?");\r
+  }\r
+\r
+  private String tableName;\r
+  private static final String CRLF = "\n\r";\r
+  private String recordId;\r
+  private boolean firstAssignment = true;\r
+}
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