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diff --git a/dexlayout/dex_container.h b/dexlayout/dex_container.h
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+++ b/dexlayout/dex_container.h
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+/*
+ * Copyright (C) 2018 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.
+ *
+ * Header file of an in-memory representation of DEX files.
+ */
+
+#ifndef ART_DEXLAYOUT_DEX_CONTAINER_H_
+#define ART_DEXLAYOUT_DEX_CONTAINER_H_
+
+#include <vector>
+
+namespace art {
+
+// Dex container holds the artifacts produced by dexlayout and contains up to two sections: a main
+// section and a data section.
+// This container may also hold metadata used for multi dex deduplication in the future.
+class DexContainer {
+ public:
+  virtual ~DexContainer() {}
+
+  class Section {
+   public:
+    virtual ~Section() {}
+
+    // Returns the start of the memory region.
+    virtual uint8_t* Begin() = 0;
+
+    // Size in bytes.
+    virtual size_t Size() const = 0;
+
+    // Resize the backing storage.
+    virtual void Resize(size_t size) = 0;
+
+    // Clear the container.
+    virtual void Clear() = 0;
+
+    // Returns the end of the memory region.
+    uint8_t* End() {
+      return Begin() + Size();
+    }
+  };
+
+  // Vector backed section.
+  class VectorSection : public Section {
+   public:
+    virtual ~VectorSection() {}
+
+    uint8_t* Begin() OVERRIDE {
+      return &data_[0];
+    }
+
+    size_t Size() const OVERRIDE {
+      return data_.size();
+    }
+
+    void Resize(size_t size) OVERRIDE {
+      data_.resize(size, 0u);
+    }
+
+    void Clear() OVERRIDE {
+      data_.clear();
+    }
+
+   private:
+    std::vector<uint8_t> data_;
+  };
+
+  virtual Section* GetMainSection() = 0;
+  virtual Section* GetDataSection() = 0;
+  virtual bool IsCompactDexContainer() const = 0;
+};
+
+}  // namespace art
+
+#endif  // ART_DEXLAYOUT_DEX_CONTAINER_H_