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diff --git a/tools/aapt/ApkBuilder.h b/tools/aapt/ApkBuilder.h
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+/*
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef __APK_BUILDER_H
+#define __APK_BUILDER_H
+
+#include <set>
+#include <utils/Errors.h>
+#include <utils/String8.h>
+#include <utils/StrongPointer.h>
+#include <utils/Vector.h>
+
+#include "ConfigDescription.h"
+#include "OutputSet.h"
+#include "ResourceFilter.h"
+
+class ApkSplit;
+class AaptFile;
+
+class ApkBuilder : public android::RefBase {
+public:
+    ApkBuilder(const sp<WeakResourceFilter>& configFilter);
+
+    /**
+     * Tells the builder to generate a separate APK for resources that
+     * match the configurations specified. Split APKs can not have
+     * overlapping resources.
+     *
+     * NOTE: All splits should be set up before any files are added.
+     */
+    android::status_t createSplitForConfigs(const std::set<ConfigDescription>& configs);
+
+    /**
+     * Adds a file to be written to the final APK. It's name must not collide
+     * with that of any files previously added. When a Split APK is being
+     * generated, duplicates can exist as long as they are in different splits
+     * (resources.arsc, AndroidManifest.xml).
+     */
+    android::status_t addEntry(const String8& path, const android::sp<AaptFile>& file);
+
+    android::Vector<sp<ApkSplit> >& getSplits() {
+        return mSplits;
+    }
+
+    void print() const;
+
+private:
+    android::sp<ResourceFilter> mConfigFilter;
+    android::sp<AndResourceFilter> mDefaultFilter;
+    android::Vector<sp<ApkSplit> > mSplits;
+};
+
+class ApkSplit : public OutputSet {
+public:
+    android::status_t addEntry(const String8& path, const android::sp<AaptFile>& file);
+
+    const std::set<OutputEntry>& getEntries() const {
+        return mFiles;
+    }
+
+    const std::set<ConfigDescription>& getConfigs() const {
+        return mConfigs;
+    }
+
+    bool matches(const sp<AaptFile>& file) const {
+        return mFilter->match(file->getGroupEntry().toParams());
+    }
+
+    sp<ResourceFilter> getResourceFilter() const {
+        return mFilter;
+    }
+
+    const android::String8& getPrintableName() const {
+        return mName;
+    }
+
+    const android::String8& getDirectorySafeName() const {
+        return mDirName;
+    }
+
+    bool isBase() const {
+        return mIsBase;
+    }
+
+    void print() const;
+
+private:
+    friend class ApkBuilder;
+
+    ApkSplit(const std::set<ConfigDescription>& configs, const android::sp<ResourceFilter>& filter, bool isBase=false);
+
+    std::set<ConfigDescription> mConfigs;
+    const sp<ResourceFilter> mFilter;
+    const bool mIsBase;
+    String8 mName;
+    String8 mDirName;
+    std::set<OutputEntry> mFiles;
+};
+
+#endif // __APK_BUILDER_H