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diff --git a/tools/aapt2/Resource.cpp b/tools/aapt2/Resource.cpp
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+++ b/tools/aapt2/Resource.cpp
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Resource.h"
+#include "StringPiece.h"
+
+#include <map>
+#include <string>
+
+namespace aapt {
+
+StringPiece16 toString(ResourceType type) {
+    switch (type) {
+        case ResourceType::kAnim:          return u"anim";
+        case ResourceType::kAnimator:      return u"animator";
+        case ResourceType::kArray:         return u"array";
+        case ResourceType::kAttr:          return u"attr";
+        case ResourceType::kAttrPrivate:   return u"attr";
+        case ResourceType::kBool:          return u"bool";
+        case ResourceType::kColor:         return u"color";
+        case ResourceType::kDimen:         return u"dimen";
+        case ResourceType::kDrawable:      return u"drawable";
+        case ResourceType::kFraction:      return u"fraction";
+        case ResourceType::kId:            return u"id";
+        case ResourceType::kInteger:       return u"integer";
+        case ResourceType::kIntegerArray:  return u"integer-array";
+        case ResourceType::kInterpolator:  return u"interpolator";
+        case ResourceType::kLayout:        return u"layout";
+        case ResourceType::kMenu:          return u"menu";
+        case ResourceType::kMipmap:        return u"mipmap";
+        case ResourceType::kPlurals:       return u"plurals";
+        case ResourceType::kRaw:           return u"raw";
+        case ResourceType::kString:        return u"string";
+        case ResourceType::kStyle:         return u"style";
+        case ResourceType::kStyleable:     return u"styleable";
+        case ResourceType::kTransition:    return u"transition";
+        case ResourceType::kXml:           return u"xml";
+    }
+    return {};
+}
+
+static const std::map<StringPiece16, ResourceType> sResourceTypeMap {
+        { u"anim", ResourceType::kAnim },
+        { u"animator", ResourceType::kAnimator },
+        { u"array", ResourceType::kArray },
+        { u"attr", ResourceType::kAttr },
+        { u"^attr-private", ResourceType::kAttrPrivate },
+        { u"bool", ResourceType::kBool },
+        { u"color", ResourceType::kColor },
+        { u"dimen", ResourceType::kDimen },
+        { u"drawable", ResourceType::kDrawable },
+        { u"fraction", ResourceType::kFraction },
+        { u"id", ResourceType::kId },
+        { u"integer", ResourceType::kInteger },
+        { u"integer-array", ResourceType::kIntegerArray },
+        { u"interpolator", ResourceType::kInterpolator },
+        { u"layout", ResourceType::kLayout },
+        { u"menu", ResourceType::kMenu },
+        { u"mipmap", ResourceType::kMipmap },
+        { u"plurals", ResourceType::kPlurals },
+        { u"raw", ResourceType::kRaw },
+        { u"string", ResourceType::kString },
+        { u"style", ResourceType::kStyle },
+        { u"styleable", ResourceType::kStyleable },
+        { u"transition", ResourceType::kTransition },
+        { u"xml", ResourceType::kXml },
+};
+
+const ResourceType* parseResourceType(const StringPiece16& str) {
+    auto iter = sResourceTypeMap.find(str);
+    if (iter == std::end(sResourceTypeMap)) {
+        return nullptr;
+    }
+    return &iter->second;
+}
+
+} // namespace aapt