bridge/src/android/content/res/AssetManager_Delegate.java

/*
 * 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.
 */

package android.content.res;

import com.android.layoutlib.bridge.impl.DelegateManager;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;

import android.util.SparseArray;

import libcore.util.NativeAllocationRegistry_Delegate;

/**
 * Delegate used to provide implementation of a select few native methods of {@link AssetManager}
 * <p/>
 * Through the layoutlib_create tool, the original native methods of AssetManager have been replaced
 * by calls to methods of the same name in this delegate class.
 *
 */
public class AssetManager_Delegate {

    // ---- delegate manager ----

    private static final DelegateManager<AssetManager_Delegate> sManager =
            new DelegateManager<>(AssetManager_Delegate.class);
    private static long sFinalizer = -1;

    // ---- delegate methods. ----

    @LayoutlibDelegate
    /*package*/ static long nativeCreate() {
        AssetManager_Delegate delegate = new AssetManager_Delegate();
        return sManager.addNewDelegate(delegate);
    }

    @LayoutlibDelegate
    /*package*/ static void nativeDestroy(long ptr) {
        sManager.removeJavaReferenceFor(ptr);
    }

    @LayoutlibDelegate
    /*package*/ static long nativeThemeCreate(long ptr) {
        return Resources_Theme_Delegate.getDelegateManager()
                .addNewDelegate(new Resources_Theme_Delegate());
    }

    @LayoutlibDelegate
    /*package*/ static long nativeGetThemeFreeFunction() {
        synchronized (AssetManager_Delegate.class) {
            if (sFinalizer == -1) {
                sFinalizer = NativeAllocationRegistry_Delegate.createFinalizer(
                        Resources_Theme_Delegate.getDelegateManager()::removeJavaReferenceFor);
            }
        }
        return sFinalizer;
    }

    @LayoutlibDelegate
    /*package*/ static SparseArray<String> getAssignedPackageIdentifiers(AssetManager manager) {
        return new SparseArray<>();
    }

    @LayoutlibDelegate
    /*package*/ static SparseArray<String> getAssignedPackageIdentifiers(AssetManager manager,
            boolean includeOverlays, boolean includeLoaders) {
        return new SparseArray<>();
    }

    @LayoutlibDelegate
    /*package*/ static void createSystemAssetsInZygoteLocked(boolean reinitialize,
            String frameworkPath) { }
}