--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/template/TemplateParser.java	Fri Dec 21 10:44:31 2012 -0800
@@ -0,0 +1,133 @@
+/*
+ * 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.codegen.processor.template;
+
+import java.util.*;
+
+import javax.lang.model.element.*;
+import javax.lang.model.util.*;
+
+import com.oracle.truffle.codegen.processor.*;
+import com.oracle.truffle.codegen.processor.api.element.*;
+import com.oracle.truffle.codegen.processor.ext.*;
+
+public abstract class TemplateParser<M extends Template> extends AbstractParser<M> {
+
+    private final ExtensionParser extensionParser;
+
+    public TemplateParser(ProcessorContext c) {
+        super(c);
+        extensionParser = new ExtensionParser(c);
+    }
+
+    public ExtensionParser getExtensionParser() {
+        return extensionParser;
+    }
+
+    protected boolean verifyExclusiveMethodAnnotation(TypeElement type, Class<?> ... annotationTypes) {
+        boolean valid = true;
+        List<ExecutableElement> methods = ElementFilter.methodsIn(type.getEnclosedElements());
+        for (ExecutableElement method : methods) {
+            List<AnnotationMirror> foundAnnotations = new ArrayList<>();
+            for (int i = 0; i < annotationTypes.length; i++) {
+                Class<?> annotationType = annotationTypes[i];
+                AnnotationMirror mirror = Utils.findAnnotationMirror(context.getEnvironment(), method, annotationType);
+                if (mirror != null) {
+                    foundAnnotations.add(mirror);
+                }
+            }
+            if (foundAnnotations.size() > 1) {
+                List<String> annotationNames = new ArrayList<>();
+                for (AnnotationMirror mirror : foundAnnotations) {
+                    annotationNames.add("@" + Utils.getSimpleName(mirror.getAnnotationType()));
+                }
+
+                for (AnnotationMirror mirror : foundAnnotations) {
+                    context.getLog().error(method, mirror, "Non exclusive usage of annotations %s.", annotationNames);
+                }
+                valid = false;
+            }
+        }
+        return valid;
+    }
+
+    protected boolean verifyTemplateType(TypeElement template, AnnotationMirror annotation) {
+        // annotation type on class path!?
+        boolean valid = true;
+        TypeElement annotationTypeElement = processingEnv.getElementUtils().getTypeElement(getAnnotationType().getCanonicalName());
+        if (annotationTypeElement == null) {
+            log.error(template, annotation, "Required class " + getAnnotationType().getName() + " is not on the classpath.");
+            valid = false;
+        }
+        if (template.getModifiers().contains(Modifier.PRIVATE)) {
+            log.error(template, annotation, "The annotated class must have at least package protected visibility.");
+            valid = false;
+        }
+
+        if (template.getModifiers().contains(Modifier.FINAL)) {
+            log.error(template, annotation, "The annotated class must not be final.");
+            valid = false;
+        }
+
+        return valid;
+    }
+
+    protected <E extends TemplateMethod> List<E> parseMethods(Template template, TemplateMethodParser<E> parser) {
+        TypeElement type = template.getTemplateType();
+
+        List<ExecutableElement> methods = new ArrayList<>();
+        methods.addAll(ElementFilter.methodsIn(type.getEnclosedElements()));
+        if (template.getExtensionElements() != null) {
+            for (WritableElement e : template.getExtensionElements()) {
+                if (e instanceof ExecutableElement) {
+                    methods.add((ExecutableElement) e);
+                }
+            }
+        }
+
+        List<E> parsedMethods = new ArrayList<>();
+        boolean valid = true;
+        for (ExecutableElement method : methods) {
+            AnnotationMirror mirror = Utils.findAnnotationMirror(processingEnv, method, parser.getAnnotationType());
+            if (mirror != null) {
+                if (method.getModifiers().contains(Modifier.PRIVATE)) {
+                    log.error(method, "Methods annotated with @%s must not be private.",  parser.getAnnotationType().getSimpleName());
+                    valid = false;
+                    continue;
+                }
+                E parsedMethod = parser.parse(method, mirror, template);
+                if (parsedMethod != null) {
+                    parsedMethods.add(parsedMethod);
+                } else {
+                    valid = false;
+                }
+            }
+        }
+        if (!valid) {
+            return null;
+        }
+        return parsedMethods;
+    }
+
+
+}