1 files changed, 49 insertions, 0 deletions
diff --git a/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/middleend/MiddleEndFactory.java b/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/middleend/MiddleEndFactory.java
new file mode 100644
index 00000000..6321bb2a
--- /dev/null
+++ b/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/middleend/MiddleEndFactory.java
@@ -0,0 +1,49 @@
+/*
+Copyright (c) 2008 Arno Haase.
+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:
+    Arno Haase - initial API and implementation
+ */
+package org.eclipse.xtend.middleend;
+
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.xtend.backend.common.BackendTypesystem;
+import org.eclipse.xtend.middleend.internal.Activator;
+import org.eclipse.xtend.middleend.internal.MiddleEndImpl;
+import org.eclipse.xtend.middleend.plugins.LanguageSpecificMiddleEnd;
+
+
+/**
+ * This class encapsulates the OSGi / Eclipse extension registry specific behavior and
+ *  initialization code. It serves as an optional wrapper / convenience initialization
+ *  code for the actual MiddleEnd class.
+ * 
+ * @author Arno Haase (http://www.haase-consulting.com)
+ */
+public final class MiddleEndFactory {
+    /**
+     * This method creates a MiddleEnd instance based on an explicitly provided list of handlers. It works without
+     *  OSGi.
+     */
+    public static MiddleEnd create (BackendTypesystem ts, List<LanguageSpecificMiddleEnd> languageHandlers) {
+        return new MiddleEndImpl (ts, languageHandlers);
+    }
+    
+    /**
+     * This method creates a middle end based on the handlers registered with the extension point. It relies
+     *  on OSGi and makes use of the Eclipse extension registry.<br>
+     * 
+     * The map with "specific params" is used to initialize the contributed middle ends.
+     *  The key must be the class implementing the LanguageSpecificMiddleEnd interface
+     *  and contributed via the extension point.
+     */
+    public static MiddleEnd createFromExtensions (BackendTypesystem ts, Map<Class<?>, Object> specificParams) {
+        return new MiddleEndImpl (ts, Activator.getInstance().getFreshMiddleEnds (specificParams));
+    }
+}