--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/AnnotationProcessor.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2012, 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 java.util.*;
+
+import javax.lang.model.element.*;
+import javax.lang.model.type.*;
+
+import com.oracle.truffle.dsl.processor.generator.*;
+import com.oracle.truffle.dsl.processor.java.*;
+import com.oracle.truffle.dsl.processor.java.model.*;
+import com.oracle.truffle.dsl.processor.java.transform.*;
+import com.oracle.truffle.dsl.processor.model.*;
+import com.oracle.truffle.dsl.processor.parser.*;
+
+/**
+ * THIS IS NOT PUBLIC API.
+ */
+class AnnotationProcessor<M extends Template> {
+
+    private final AbstractParser<M> parser;
+    private final CodeTypeElementFactory<M> factory;
+
+    private final Set<String> processedElements = new HashSet<>();
+
+    public AnnotationProcessor(AbstractParser<M> parser, CodeTypeElementFactory<M> factory) {
+        this.parser = parser;
+        this.factory = factory;
+    }
+
+    public AbstractParser<M> getParser() {
+        return parser;
+    }
+
+    @SuppressWarnings({"unchecked"})
+    public void process(Element element, boolean callback) {
+        // since it is not guaranteed to be called only once by the compiler
+        // we check for already processed elements to avoid errors when writing files.
+        if (!callback && element instanceof TypeElement) {
+            String qualifiedName = ElementUtils.getQualifiedName((TypeElement) element);
+            if (processedElements.contains(qualifiedName)) {
+                return;
+            }
+            processedElements.add(qualifiedName);
+        }
+
+        ProcessorContext context = ProcessorContext.getInstance();
+        TypeElement type = (TypeElement) element;
+
+        M model = (M) context.getTemplate(type.asType(), false);
+        boolean firstRun = !context.containsTemplate(type);
+
+        if (firstRun || !callback) {
+            context.registerTemplate(type, null);
+            model = parser.parse(element);
+            context.registerTemplate(type, model);
+
+            if (model != null) {
+                CodeTypeElement unit;
+                try {
+                    unit = factory.create(ProcessorContext.getInstance(), model);
+                } catch (Throwable e) {
+                    throw new RuntimeException(String.format("Failed to write code for %s. Parserdump:%s.", ElementUtils.getQualifiedName(type), ""), e);
+                }
+                if (unit == null) {
+                    return;
+                }
+                unit.setGeneratorAnnotationMirror(model.getTemplateTypeAnnotation());
+                unit.setGeneratorElement(model.getTemplateType());
+
+                DeclaredType overrideType = (DeclaredType) context.getType(Override.class);
+                DeclaredType unusedType = (DeclaredType) context.getType(SuppressWarnings.class);
+                unit.accept(new GenerateOverrideVisitor(overrideType), null);
+                unit.accept(new FixWarningsVisitor(context.getEnvironment(), unusedType, overrideType), null);
+
+                if (!callback) {
+                    unit.accept(new CodeWriter(context.getEnvironment(), element), null);
+                }
+            }
+        }
+    }
+}