Added text file

[jaddressbook-lib.git] / Addressbook / src / org / mxchange / addressbook / database / backend / BaseDatabaseBackend.java

diff --git a/Addressbook/src/org/mxchange/addressbook/database/backend/BaseDatabaseBackend.java b/Addressbook/src/org/mxchange/addressbook/database/backend/BaseDatabaseBackend.java
index 539f6d2c43528defe79a6538a8d95795aaa82ec8..5a666916c965629d72585ab3e468091666882da3 100644 (file)
--- a/Addressbook/src/org/mxchange/addressbook/database/backend/BaseDatabaseBackend.java
+++ b/Addressbook/src/org/mxchange/addressbook/database/backend/BaseDatabaseBackend.java
@@ -1,32 +1,86 @@
-/*\r
- * Copyright (C) 2015 Roland Haeder\r
- *\r
- * This program 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 3 of the License, or\r
- * (at your option) any later version.\r
- *\r
- * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.\r
- */\r
-package org.mxchange.addressbook.database.backend;\r
-\r
-import org.mxchange.addressbook.BaseFrameworkSystem;\r
-\r
-/**\r
- * Generall database backend\r
- * \r
- * @author Roland Haeder\r
- */\r
-public class BaseDatabaseBackend extends BaseFrameworkSystem {\r
-    /**\r
-     * No instances from this class\r
-     */\r
-    protected BaseDatabaseBackend () {\r
-    }\r
-}\r
+/*
+ * Copyright (C) 2015 Roland Haeder
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.addressbook.database.backend;
+
+import java.sql.Driver;
+import java.sql.DriverManager;
+import java.text.MessageFormat;
+import java.util.Enumeration;
+import org.mxchange.addressbook.BaseFrameworkSystem;
+import org.mxchange.addressbook.exceptions.UnsupportedDatabaseDriverException;
+
+/**
+ * Generall database backend
+ *
+ * @author Roland Haeder
+ */
+public class BaseDatabaseBackend extends BaseFrameworkSystem {
+
+       /**
+        * No instances from this class
+        */
+       protected BaseDatabaseBackend () {
+       }
+
+       /**
+        * Validates driver name and throws an exception if the driver is not valid
+        *
+        * @param driverName Driver name (e.g. "mysql")
+        * @throws org.mxchange.addressbook.exceptions.UnsupportedDatabaseDriverException If the given driver name cannot be solved into a driver instance
+        */
+       protected void validateDriver (final String driverName) throws UnsupportedDatabaseDriverException {
+               // Trace message
+               this.getLogger().trace(MessageFormat.format("driverName={0} - CALLED!", driverName)); //NOI18N
+
+               // Try to find the driver in driver list
+               Enumeration<Driver> drivers = DriverManager.getDrivers();
+
+               // Default is not found
+               boolean isFound = false;
+
+               // Search for it
+               while (drivers.hasMoreElements()) {
+                       // Get element
+                       Driver driver = drivers.nextElement();
+
+                       // Debug message
+                       this.getLogger().debug(MessageFormat.format("Driver {0} is installed.", driver)); //NOI18N
+
+                       // Get class name
+                       String className = driver.getClass().getName();
+
+                       // Is this wanted?
+                       if (className.contains(driverName)) {
+                               // Debug message
+                               this.getLogger().debug("Found driver!"); //NOI18N
+
+                               // Found it
+                               isFound = true;
+                               break;
+                       }
+               }
+
+               // Is it found?
+               if (!isFound) {
+                       // Throw exception
+                       throw new UnsupportedDatabaseDriverException(driverName);
+               }
+
+               // Trace message
+               this.getLogger().trace("EXIT!"); //NOI18N
+       }
+}