1 files changed, 60 insertions, 0 deletions
diff --git a/core/org.eclipse.emf.teneo/src/org/eclipse/emf/teneo/extension/ExtensionManager.java b/core/org.eclipse.emf.teneo/src/org/eclipse/emf/teneo/extension/ExtensionManager.java
new file mode 100755
index 000000000..a8357a779
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+++ b/core/org.eclipse.emf.teneo/src/org/eclipse/emf/teneo/extension/ExtensionManager.java
@@ -0,0 +1,60 @@
+/**
+ * <copyright>
+ *
+ * Copyright (c) 2005, 2006, 2007, 2008 Springsite BV (The Netherlands) and others
+ * 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:
+ *   Martin Taal - Initial API and implementation
+ *
+ * </copyright>
+ *
+ * $Id: ExtensionManager.java,v 1.6 2009/03/30 07:53:04 mtaal Exp $
+ */
+
+package org.eclipse.emf.teneo.extension;
+
+/**
+ * Manages a set of extensions. Currently for each extension point there will always be only one
+ * extension instance.
+ * 
+ * @author <a href="mailto:mtaal@elver.org">Martin Taal</a>
+ * @version $Revision: 1.6 $
+ */
+public interface ExtensionManager {
+
+	/**
+	 * Register an extension. If there is already a non-default extension registered then it is not
+	 * overwritten.
+	 */
+	public abstract void registerExtension(Extension extension);
+
+	/**
+	 * Return an instance of an extension, pass null if no constructor arguments are required for
+	 * this extension
+	 */
+	public abstract ExtensionPoint getExtension(String point, Object[] initArgs);
+
+	/**
+	 * Convenience method which also performs the casting and uses the classname of the class
+	 * parameter to search for the plugin.
+	 */
+	public abstract <T> T getExtension(Class<T> clz);
+
+	/**
+	 * Convenience method which also performs the casting and uses the classname of the class
+	 * parameter to search for the plugin.
+	 */
+	public abstract <T> T getExtension(Class<T> clz, Object[] initArgs);
+
+	/**
+	 * Convenience method to register a user extension overriding a current extension. It will
+	 * search for an existing extension using the point. If not found then an exception is thrown.
+	 * In case a completely new extension is to be registered then use the registerExtension method.
+	 * The singleton value from the existing extension is used. value is used from that extension.
+	 */
+	public void registerExtension(String point, String className);
+}
+\ No newline at end of file