--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/ParameterSpec.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,165 @@
+/*
+ * 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.model;
+
+import java.util.*;
+
+import javax.lang.model.element.*;
+import javax.lang.model.type.*;
+
+import com.oracle.truffle.dsl.processor.*;
+import com.oracle.truffle.dsl.processor.java.*;
+import com.oracle.truffle.dsl.processor.model.MethodSpec.TypeDef;
+
+public class ParameterSpec {
+
+    private final String name;
+    private final Collection<TypeMirror> allowedTypes;
+    private final boolean anyType;
+
+    /** Type is bound to local final variable. */
+    private boolean local;
+    private boolean signature;
+    private boolean allowSubclasses = true;
+
+    /** Optional bound execution of node. */
+    private NodeExecutionData execution;
+    private TypeDef typeDefinition;
+
+    public ParameterSpec(String name, Collection<TypeMirror> allowedTypes) {
+        this.name = name;
+        this.allowedTypes = allowedTypes;
+        boolean anyTypeTemp = false;
+        for (TypeMirror type : allowedTypes) {
+            if (ElementUtils.isObject(type)) {
+                anyTypeTemp = true;
+                break;
+            }
+        }
+        this.anyType = anyTypeTemp;
+    }
+
+    public boolean isAnnotated() {
+        return false;
+    }
+
+    public ParameterSpec(ParameterSpec original, TypeMirror newType) {
+        this(original.name, newType);
+        this.local = original.local;
+        this.signature = original.signature;
+        this.execution = original.execution;
+        this.typeDefinition = original.typeDefinition;
+        this.allowSubclasses = original.allowSubclasses;
+    }
+
+    public ParameterSpec(String name, TypeMirror type) {
+        this(name, Arrays.asList(type));
+    }
+
+    public void setAllowSubclasses(boolean allowSubclasses) {
+        this.allowSubclasses = allowSubclasses;
+    }
+
+    public NodeExecutionData getExecution() {
+        return execution;
+    }
+
+    public void setExecution(NodeExecutionData executionData) {
+        this.execution = executionData;
+        this.signature = execution != null;
+    }
+
+    public void setSignature(boolean signature) {
+        this.signature = signature;
+    }
+
+    void setTypeDefinition(TypeDef typeDefinition) {
+        this.typeDefinition = typeDefinition;
+    }
+
+    TypeDef getTypeDefinition() {
+        return typeDefinition;
+    }
+
+    public void setLocal(boolean local) {
+        this.local = local;
+    }
+
+    public boolean isSignature() {
+        return signature;
+    }
+
+    public boolean isLocal() {
+        return local;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Collection<TypeMirror> getAllowedTypes() {
+        return allowedTypes;
+    }
+
+    public boolean matches(VariableElement variable) {
+        if (anyType) {
+            return true;
+        } else {
+            for (TypeMirror type : allowedTypes) {
+                if (ElementUtils.typeEquals(variable.asType(), type)) {
+                    return true;
+                }
+            }
+            if (allowSubclasses) {
+                for (TypeMirror type : allowedTypes) {
+                    if (ElementUtils.isSubtypeBoxed(ProcessorContext.getInstance(), variable.asType(), type)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return toSignatureString(false);
+    }
+
+    public String toSignatureString(boolean typeOnly) {
+        StringBuilder builder = new StringBuilder();
+        if (typeDefinition != null) {
+            builder.append("<" + typeDefinition.getName() + ">");
+        } else if (getAllowedTypes().size() >= 1) {
+            builder.append(ElementUtils.getSimpleName(getAllowedTypes().iterator().next()));
+        } else {
+            builder.append("void");
+        }
+        if (!typeOnly) {
+            builder.append(" ");
+            builder.append(getName());
+        }
+        return builder.toString();
+    }
+
+}