1 files changed, 80 insertions, 0 deletions
diff --git a/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/DBAdapterRegistry.java b/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/DBAdapterRegistry.java
new file mode 100644
index 0000000000..5bb1b26b20
--- /dev/null
+++ b/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/DBAdapterRegistry.java
@@ -0,0 +1,80 @@
+/***************************************************************************
+ * Copyright (c) 2004 - 2007 Eike Stepper, Germany.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *    Eike Stepper - initial API and implementation
+ **************************************************************************/
+package org.eclipse.net4j.internal.db;
+
+import org.eclipse.net4j.db.IDBAdapter;
+import org.eclipse.net4j.internal.util.registry.HashMapRegistry;
+import org.eclipse.net4j.util.registry.IRegistry;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Eike Stepper
+ */
+public class DBAdapterRegistry extends HashMapRegistry<String, IDBAdapter> implements IRegistry<String, IDBAdapter>
+{
+  public static final DBAdapterRegistry INSTANCE = new DBAdapterRegistry();
+
+  private Map<String, DBAdapterDescriptor> descriptors = new HashMap();
+
+  public DBAdapterRegistry()
+  {
+  }
+
+  public DBAdapterRegistry(int initialCapacity)
+  {
+    super(initialCapacity);
+  }
+
+  public DBAdapterRegistry(int initialCapacity, float loadFactor)
+  {
+    super(initialCapacity, loadFactor);
+  }
+
+  public DBAdapterRegistry(Map<? extends String, ? extends IDBAdapter> m)
+  {
+    super(m);
+  }
+
+  @Override
+  public IDBAdapter get(Object key)
+  {
+    IDBAdapter adapter = super.get(key);
+    if (adapter == null)
+    {
+      if (key instanceof String)
+      {
+        DBAdapterDescriptor descriptor = descriptors.get(key);
+        if (descriptor != null)
+        {
+          adapter = descriptor.createDBAdapter();
+          if (adapter != null)
+          {
+            put((String)key, adapter);
+          }
+        }
+      }
+    }
+
+    return adapter;
+  }
+
+  public DBAdapterDescriptor addDescriptor(DBAdapterDescriptor descriptor)
+  {
+    return descriptors.put(descriptor.getName(), descriptor);
+  }
+
+  public DBAdapterDescriptor removeDescriptor(String name)
+  {
+    return descriptors.remove(name);
+  }
+}