Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db / src / org / simantics / db / Manager.java

diff --git a/bundles/org.simantics.db/src/org/simantics/db/Manager.java b/bundles/org.simantics.db/src/org/simantics/db/Manager.java
new file mode 100644 (file)
index 0000000..69b75e3
--- /dev/null
+++ b/bundles/org.simantics.db/src/org/simantics/db/Manager.java
@@ -0,0 +1,87 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db;\r
+\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashMap;\r
+import java.util.Map;\r
+\r
+import org.osgi.framework.BundleContext;\r
+import org.osgi.framework.InvalidSyntaxException;\r
+import org.osgi.framework.ServiceReference;\r
+import org.simantics.db.internal.Activator;\r
+\r
+/**\r
+ * @author Antti Villberg\r
+ */\r
+public final class Manager {\r
+\r
+    private Manager() {}\r
+\r
+    /**\r
+     * Search for registered database driver by driver id.\r
+     *\r
+     * @param id for database driver.\r
+     * @return database driver or null.\r
+     */\r
+    public static Driver getDriver(String id) {\r
+        Map<String, Driver> drivers = collectDrivers();\r
+        return drivers.get(id);\r
+    }\r
+\r
+    private static Map<String, Driver> collectDrivers() {\r
+        BundleContext context = Activator.getContext();\r
+        Collection<ServiceReference<Driver>> serviceReferences;\r
+        try {\r
+            serviceReferences = context.getServiceReferences(Driver.class, null);\r
+        } catch (InvalidSyntaxException e) {\r
+            e.printStackTrace();\r
+            serviceReferences = Collections.emptyList();\r
+        }\r
+        Map<String, Driver> drivers = new HashMap<>(serviceReferences.size());\r
+        for (ServiceReference<Driver> reference : serviceReferences) {\r
+            Driver driver = context.getService(reference);\r
+            String driverName = driver.getName();\r
+            if (driverName != null && !driverName.isEmpty()) {\r
+                drivers.put(driverName, driver);\r
+            }\r
+        }\r
+        return drivers;\r
+    }\r
+    \r
+    public static DatabaseUserAgent getUserAgent(String id) {\r
+        Map<String, DatabaseUserAgent> agents = collectUserAgents();\r
+        return agents.get(id);\r
+    }\r
+    \r
+    private static Map<String, DatabaseUserAgent> collectUserAgents() {\r
+        BundleContext context = Activator.getContext();\r
+        Collection<ServiceReference<DatabaseUserAgent>> serviceReferences;\r
+        try {\r
+            serviceReferences = context.getServiceReferences(DatabaseUserAgent.class, null);\r
+        } catch (InvalidSyntaxException e) {\r
+            e.printStackTrace();\r
+            serviceReferences = Collections.emptyList();\r
+        }\r
+        Map<String, DatabaseUserAgent> drivers = new HashMap<>(serviceReferences.size());\r
+        for (ServiceReference<DatabaseUserAgent> reference : serviceReferences) {\r
+            DatabaseUserAgent dbua = context.getService(reference);\r
+            String driverName = dbua.getId();\r
+            if (driverName != null && !driverName.isEmpty()) {\r
+                drivers.put(driverName, dbua);\r
+            }\r
+        }\r
+        return drivers;\r
+    }\r
+\r
+}\r