--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/LanguageRegistrationProcessor.java	Fri May 22 13:41:10 2015 +0200
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.dsl.processor;
+
+import com.oracle.truffle.api.TruffleLanguage.Registration;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Properties;
+import java.util.Set;
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.SourceVersion;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.Modifier;
+import javax.lang.model.element.TypeElement;
+import javax.tools.Diagnostic.Kind;
+import javax.tools.FileObject;
+import javax.tools.StandardLocation;
+
+@SupportedAnnotationTypes("com.oracle.truffle.api.*")
+public final class LanguageRegistrationProcessor extends AbstractProcessor {
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.latest();
+    }
+
+    private void createProviderFile(TypeElement language, Registration annotation) {
+        String filename = "META-INF/truffle/language";
+        try {
+            FileObject file = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", filename, language);
+            Properties p = new Properties();
+            String className = processingEnv.getElementUtils().getBinaryName(language).toString();
+            p.setProperty("name", annotation.name());
+            p.setProperty("className", className);
+            String[] mimes = annotation.mimeType();
+            for (int i = 0; i < mimes.length; i++) {
+                p.setProperty("mimeType." + i, mimes[i]);
+            }
+            try (OutputStream os = file.openOutputStream()) {
+                p.store(os, "Generated by " + LanguageRegistrationProcessor.class.getName());
+            }
+        } catch (IOException e) {
+            processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage(), language);
+        }
+    }
+
+    @Override
+    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+        for (Element e : roundEnv.getElementsAnnotatedWith(Registration.class)) {
+            Registration annotation = e.getAnnotation(Registration.class);
+            if (annotation != null && e.getKind() == ElementKind.CLASS) {
+                if (!e.getModifiers().contains(Modifier.PUBLIC)) {
+                    processingEnv.getMessager().printMessage(Kind.ERROR, "Registered language class must be public", e);
+                }
+                createProviderFile((TypeElement) e, annotation);
+            }
+        }
+
+        return true;
+    }
+}