62 lines
2.2 KiB
Java
62 lines
2.2 KiB
Java
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// Copyright 2014 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package org.chromium.base;
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import org.jni_zero.CalledByNative;
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import java.util.Map;
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/** This class provides JNI-related methods to the native library. */
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public class JNIUtils {
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private static final String TAG = "JNIUtils";
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private static ClassLoader sJniClassLoader;
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/**
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* Returns a ClassLoader which can load Java classes from the specified split.
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*
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* @param splitName Name of the split, or empty string for the base split.
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*/
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@CalledByNative
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private static ClassLoader getSplitClassLoader(String splitName) {
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if (!splitName.isEmpty()) {
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boolean isInstalled = BundleUtils.isIsolatedSplitInstalled(splitName);
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Log.i(TAG, "Init JNI Classloader for %s. isInstalled=%b", splitName, isInstalled);
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if (isInstalled) {
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return BundleUtils.getOrCreateSplitClassLoader(splitName);
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} else {
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// Split was installed by PlayCore in "compat" mode, meaning that our base module's
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// ClassLoader was patched to add the splits' dex file to it.
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// This should never happen on Android T+, where PlayCore is configured to fully
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// install splits from the get-go, but can still sometimes happen if play store
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// is very out of date.
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}
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}
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return sJniClassLoader != null ? sJniClassLoader : JNIUtils.class.getClassLoader();
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}
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/**
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* Sets the ClassLoader to be used for loading Java classes from native.
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*
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* @param classLoader the ClassLoader to use.
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*/
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public static void setClassLoader(ClassLoader classLoader) {
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sJniClassLoader = classLoader;
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}
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/** Helper to convert from java maps to two arrays for JNI. */
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public static <K, V> void splitMap(Map<K, V> map, K[] outKeys, V[] outValues) {
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assert map.size() == outKeys.length;
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assert outValues.length == outKeys.length;
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int i = 0;
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for (Map.Entry<K, V> entry : map.entrySet()) {
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outKeys[i] = entry.getKey();
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outValues[i] = entry.getValue();
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i++;
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}
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}
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}
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