--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/AnnotationProcessor.java	Mon Jul 01 20:58:32 2013 +0200
@@ -0,0 +1,132 @@
+/*
+ * 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.io.*;
+import java.util.*;
+
+import javax.annotation.processing.*;
+import javax.lang.model.element.*;
+import javax.lang.model.type.*;
+import javax.tools.*;
+
+import com.oracle.truffle.dsl.processor.ast.*;
+import com.oracle.truffle.dsl.processor.codewriter.*;
+import com.oracle.truffle.dsl.processor.compiler.*;
+import com.oracle.truffle.dsl.processor.template.*;
+
+/**
+ * THIS IS NOT PUBLIC API.
+ */
+class AnnotationProcessor<M extends Template> {
+
+    private final AbstractParser<M> parser;
+    private final CompilationUnitFactory<M> factory;
+    private final ProcessorContext context;
+
+    private final Set<String> processedElements = new HashSet<>();
+
+    public AnnotationProcessor(ProcessorContext context, AbstractParser<M> parser, CompilationUnitFactory<M> factory) {
+        this.context = context;
+        this.parser = parser;
+        this.factory = factory;
+    }
+
+    public AbstractParser<M> getParser() {
+        return parser;
+    }
+
+    public ProcessorContext getContext() {
+        return context;
+    }
+
+    @SuppressWarnings({"unchecked"})
+    public void process(RoundEnvironment env, 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 = Utils.getQualifiedName((TypeElement) element);
+            if (processedElements.contains(qualifiedName)) {
+                return;
+            }
+            processedElements.add(qualifiedName);
+        }
+
+        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(env, element);
+            context.registerTemplate(type, model);
+
+            if (model != null) {
+                CodeCompilationUnit unit = factory.process(null, model);
+                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, unusedType, overrideType), null);
+
+                if (!callback) {
+                    unit.accept(new CodeWriter(context.getEnvironment(), element), null);
+                }
+            }
+        }
+    }
+
+    private static class CodeWriter extends AbstractCodeWriter {
+
+        private final Element orignalElement;
+        private final ProcessingEnvironment env;
+
+        public CodeWriter(ProcessingEnvironment env, Element originalElement) {
+            this.env = env;
+            this.orignalElement = originalElement;
+        }
+
+        @Override
+        protected Writer createWriter(CodeTypeElement clazz) throws IOException {
+            JavaFileObject jfo = env.getFiler().createSourceFile(clazz.getQualifiedName(), orignalElement);
+            return jfo.openWriter();
+        }
+
+        @Override
+        protected void writeHeader() {
+            if (env == null) {
+                return;
+            }
+            String comment = CompilerFactory.getCompiler(orignalElement).getHeaderComment(env, orignalElement);
+            if (comment != null) {
+                writeLn(comment);
+            }
+        }
+
+    }
+
+}