/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
package com.facebook.react.bridge;
import android.content.res.AssetManager;
/**
* A class that stores JS bundle information and allows {@link CatalystInstance} to load a correct
* bundle through {@link ReactBridge}.
*/
public abstract class JSBundleLoader {
/**
* This loader is recommended one for release version of your app. In that case local JS executor
* should be used. JS bundle will be read from assets directory in native code to save on passing
* large strings from java to native memory.
*/
public static JSBundleLoader createAssetLoader(
final AssetManager assetManager,
final String assetFileName) {
return new JSBundleLoader() {
@Override
public void loadScript(ReactBridge bridge) {
bridge.loadScriptFromAssets(assetManager, assetFileName);
}
@Override
public String getSourceUrl() {
return "file:///android_asset/" + assetFileName;
}
};
}
/**
* This loader is used when bundle gets reloaded from dev server. In that case loader expect JS
* bundle to be prefetched and stored in local file. We do that to avoid passing large strings
* between java and native code and avoid allocating memory in java to fit whole JS bundle in it.
* Providing correct {@param sourceURL} of downloaded bundle is required for JS stacktraces to
* work correctly and allows for source maps to correctly symbolize those.
*/
public static JSBundleLoader createCachedBundleFromNetworkLoader(
final String sourceURL,
final String cachedFileLocation) {
return new JSBundleLoader() {
@Override
public void loadScript(ReactBridge bridge) {
bridge.loadScriptFromNetworkCached(sourceURL, cachedFileLocation);
}
@Override
public String getSourceUrl() {
return sourceURL;
}
};
}
/**
* This loader is used when proxy debugging is enabled. In that case there is no point in fetching
* the bundle from device as remote executor will have to do it anyway.
*/
public static JSBundleLoader createRemoteDebuggerBundleLoader(
final String sourceURL) {
return new JSBundleLoader() {
@Override
public void loadScript(ReactBridge bridge) {
bridge.loadScriptFromNetworkCached(sourceURL, null);
}
@Override
public String getSourceUrl() {
return sourceURL;
}
};
}
public abstract void loadScript(ReactBridge bridge);
public abstract String getSourceUrl();
}