--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/TypeSystemData.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2012, 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.api.dsl.internal.*;
+import com.oracle.truffle.dsl.processor.*;
+import com.oracle.truffle.dsl.processor.java.*;
+
+public class TypeSystemData extends Template {
+
+    private final List<ImplicitCastData> implicitCasts = new ArrayList<>();
+    private final List<TypeCastData> casts = new ArrayList<>();
+    private final List<TypeCheckData> checks = new ArrayList<>();
+    private final List<TypeMirror> legacyTypes = new ArrayList<>();
+
+    private Set<String> legacyTypeIds;
+
+    private final boolean isDefault;
+    private final DSLOptions options;
+
+    public TypeSystemData(ProcessorContext context, TypeElement templateType, AnnotationMirror annotation, DSLOptions options, boolean isDefault) {
+        super(context, templateType, annotation);
+        this.options = options;
+        this.isDefault = isDefault;
+    }
+
+    public boolean isDefault() {
+        return isDefault;
+    }
+
+    public DSLOptions getOptions() {
+        return options;
+    }
+
+    @Override
+    public TypeSystemData getTypeSystem() {
+        return this;
+    }
+
+    public List<TypeMirror> getLegacyTypes() {
+        return legacyTypes;
+    }
+
+    public TypeCastData getCast(TypeMirror targetType) {
+        for (TypeCastData cast : casts) {
+            if (ElementUtils.typeEquals(cast.getTargetType(), targetType)) {
+                return cast;
+            }
+        }
+        return null;
+    }
+
+    public TypeCheckData getCheck(TypeMirror type) {
+        for (TypeCheckData check : checks) {
+            if (ElementUtils.typeEquals(check.getCheckedType(), type)) {
+                return check;
+            }
+        }
+        return null;
+    }
+
+    public List<ImplicitCastData> getImplicitCasts() {
+        return implicitCasts;
+    }
+
+    public List<TypeCastData> getCasts() {
+        return casts;
+    }
+
+    public List<TypeCheckData> getChecks() {
+        return checks;
+    }
+
+    @Override
+    protected List<MessageContainer> findChildContainers() {
+        List<MessageContainer> sinks = new ArrayList<>();
+        if (checks != null) {
+            sinks.addAll(checks);
+        }
+        if (casts != null) {
+            sinks.addAll(casts);
+        }
+        if (implicitCasts != null) {
+            sinks.addAll(implicitCasts);
+        }
+        return sinks;
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + "[template = " + ElementUtils.getSimpleName(getTemplateType()) + "]";
+    }
+
+    public List<ImplicitCastData> lookupByTargetType(TypeMirror targetType) {
+        if (getImplicitCasts() == null) {
+            return Collections.emptyList();
+        }
+        List<ImplicitCastData> foundCasts = new ArrayList<>();
+        for (ImplicitCastData cast : getImplicitCasts()) {
+            if (ElementUtils.typeEquals(cast.getTargetType(), targetType)) {
+                foundCasts.add(cast);
+            }
+        }
+        return foundCasts;
+    }
+
+    public ImplicitCastData lookupCast(TypeMirror sourceType, TypeMirror targetType) {
+        if (getImplicitCasts() == null) {
+            return null;
+        }
+        for (ImplicitCastData cast : getImplicitCasts()) {
+            if (ElementUtils.typeEquals(cast.getSourceType(), sourceType) && ElementUtils.typeEquals(cast.getTargetType(), targetType)) {
+                return cast;
+            }
+        }
+        return null;
+    }
+
+    public boolean hasImplicitSourceTypes(TypeMirror targetType) {
+        if (getImplicitCasts() == null) {
+            return false;
+        }
+        for (ImplicitCastData cast : getImplicitCasts()) {
+            if (ElementUtils.typeEquals(cast.getTargetType(), targetType)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public List<TypeMirror> lookupTargetTypes() {
+        List<TypeMirror> sourceTypes = new ArrayList<>();
+        for (ImplicitCastData cast : getImplicitCasts()) {
+            sourceTypes.add(cast.getTargetType());
+        }
+        return ElementUtils.uniqueSortedTypes(sourceTypes, true);
+    }
+
+    public List<TypeMirror> lookupSourceTypes(TypeMirror targetType) {
+        List<TypeMirror> sourceTypes = new ArrayList<>();
+        sourceTypes.add(targetType);
+        for (ImplicitCastData cast : getImplicitCasts()) {
+            if (ElementUtils.typeEquals(cast.getTargetType(), targetType)) {
+                sourceTypes.add(cast.getSourceType());
+            }
+        }
+        return ElementUtils.uniqueSortedTypes(sourceTypes, true);
+    }
+
+    public boolean isImplicitSubtypeOf(TypeMirror source, TypeMirror target) {
+        List<ImplicitCastData> targetCasts = lookupByTargetType(target);
+        for (ImplicitCastData cast : targetCasts) {
+            if (ElementUtils.isSubtype(boxType(source), boxType(cast.getSourceType()))) {
+                return true;
+            }
+        }
+        return ElementUtils.isSubtype(boxType(source), boxType(target));
+    }
+
+    public TypeMirror boxType(TypeMirror type) {
+        return ElementUtils.boxType(getContext(), type);
+    }
+
+    public boolean hasType(TypeMirror type) {
+        if (legacyTypeIds == null) {
+            legacyTypeIds = new HashSet<>();
+            for (TypeMirror legacyType : legacyTypes) {
+                legacyTypeIds.add(ElementUtils.getTypeId(legacyType));
+            }
+        }
+        return legacyTypeIds.contains(ElementUtils.getTypeId(type));
+    }
+
+}