Asset redirections are now managed by a system service.

Adjusted the asset redirection design to use a common system service
(AssetRedirectionManagerService) for synchronization and cache
management.  This replaces the old /data/res-cache design completely
(nothing is written to disk now).

This change also moves a large amount of code from the C++ layer to Java
for parsing the theme meta data and redirection XML files, though the
actual redirection still occurs at the native layer.

Change-Id: I8820e39425135269f5e723534c4b9c8dc6841779

1 files changed, 176 insertions, 0 deletions

diff --git a/core/jni/android_util_PackageRedirectionMap.cpp b/core/jni/android_util_PackageRedirectionMap.cpp
new file mode 100644
index 0000000..2391edb
--- /dev/null
+++ b/core/jni/android_util_PackageRedirectionMap.cpp
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2011, T-Mobile USA, Inc.
+ *
+ * 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.
+ */
+
+#include <utils/PackageRedirectionMap.h>
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include <utils/misc.h>
+#include <android_runtime/AndroidRuntime.h>
+
+#include "android_util_Binder.h"
+#include <binder/Parcel.h>
+
+#include <utils/ResourceTypes.h>
+
+#include <stdio.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+static PackageRedirectionMap* PackageRedirectionMap_constructor(JNIEnv* env, jobject clazz)
+{
+    return new PackageRedirectionMap;
+}
+
+static void PackageRedirectionMap_destructor(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap)
+{
+    delete resMap;
+}
+
+static PackageRedirectionMap* PackageRedirectionMap_createFromParcel(JNIEnv* env, jobject clazz,
+        jobject parcel)
+{
+    if (parcel == NULL) {
+        return NULL;
+    }
+
+    Parcel* p = parcelForJavaObject(env, parcel);
+    PackageRedirectionMap* resMap = new PackageRedirectionMap;
+
+    int32_t entryCount = p->readInt32();
+    while (entryCount-- > 0) {
+        uint32_t fromIdent = (uint32_t)p->readInt32();
+        uint32_t toIdent = (uint32_t)p->readInt32();
+        resMap->addRedirection(fromIdent, toIdent);
+    }
+
+    return resMap;
+}
+
+static jboolean PackageRedirectionMap_writeToParcel(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap, jobject parcel)
+{
+    if (parcel == NULL) {
+        return JNI_FALSE;
+    }
+
+    Parcel* p = parcelForJavaObject(env, parcel);
+
+    int package = resMap->getPackage();
+    size_t nTypes = resMap->getNumberOfTypes();
+    size_t entryCount = 0;
+    for (size_t type=0; type<nTypes; type++) {
+        entryCount += resMap->getNumberOfUsedEntries(type);
+    }
+    p->writeInt32(entryCount);
+    for (size_t type=0; type<nTypes; type++) {
+        size_t nEntries = resMap->getNumberOfEntries(type);
+        for (size_t entry=0; entry<nEntries; entry++) {
+            uint32_t toIdent = resMap->getEntry(type, entry);
+            if (toIdent != 0) {
+                uint32_t fromIdent = Res_MAKEID(package-1, type, entry);
+                p->writeInt32(fromIdent);
+                p->writeInt32(toIdent);
+            }
+        }
+    }
+
+    return JNI_TRUE;
+}
+
+static void PackageRedirectionMap_addRedirection(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap, jint fromIdent, jint toIdent)
+{
+    resMap->addRedirection(fromIdent, toIdent);
+}
+
+static jint PackageRedirectionMap_getPackageId(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap)
+{
+    return resMap->getPackage();
+}
+
+static jint PackageRedirectionMap_lookupRedirection(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap, jint fromIdent)
+{
+    return resMap->lookupRedirection(fromIdent);
+}
+
+static jintArray PackageRedirectionMap_getRedirectionKeys(JNIEnv* env, jobject clazz,
+        PackageRedirectionMap* resMap)
+{
+    int package = resMap->getPackage();
+    size_t nTypes = resMap->getNumberOfTypes();
+    size_t entryCount = 0;
+    for (size_t type=0; type<nTypes; type++) {
+        size_t usedEntries = resMap->getNumberOfUsedEntries(type);
+        entryCount += usedEntries;
+    }
+    jintArray array = env->NewIntArray(entryCount);
+    if (array == NULL) {
+        jniThrowException(env, "java/lang/OutOfMemoryError", "");
+        return NULL;
+    }
+    jsize index = 0;
+    for (size_t type=0; type<nTypes; type++) {
+        size_t nEntries = resMap->getNumberOfEntries(type);
+        for (size_t entry=0; entry<nEntries; entry++) {
+            uint32_t toIdent = resMap->getEntry(type, entry);
+            if (toIdent != 0) {
+                jint fromIdent = (jint)Res_MAKEID(package-1, type, entry);
+                env->SetIntArrayRegion(array, index++, 1, &fromIdent);
+            }
+        }
+    }
+    return array;
+}
+
+// ----------------------------------------------------------------------------
+
+/*
+ * JNI registration.
+ */
+static JNINativeMethod gPackageRedirectionMapMethods[] = {
+    { "nativeConstructor",      "()I",
+        (void*) PackageRedirectionMap_constructor },
+    { "nativeDestructor",       "(I)V",
+        (void*) PackageRedirectionMap_destructor },
+    { "nativeCreateFromParcel", "(Landroid/os/Parcel;)I",
+        (void*) PackageRedirectionMap_createFromParcel },
+    { "nativeWriteToParcel", "(ILandroid/os/Parcel;)Z",
+        (void*) PackageRedirectionMap_writeToParcel },
+    { "nativeAddRedirection", "(III)V",
+        (void*) PackageRedirectionMap_addRedirection },
+    { "nativeGetPackageId", "(I)I",
+        (void*) PackageRedirectionMap_getPackageId },
+    { "nativeLookupRedirection", "(II)I",
+        (void*) PackageRedirectionMap_lookupRedirection },
+    { "nativeGetRedirectionKeys", "(I)[I",
+        (void*) PackageRedirectionMap_getRedirectionKeys },
+};
+
+int register_android_content_res_PackageRedirectionMap(JNIEnv* env)
+{
+    return AndroidRuntime::registerNativeMethods(env,
+            "android/content/res/PackageRedirectionMap",
+            gPackageRedirectionMapMethods,
+            NELEM(gPackageRedirectionMapMethods));
+}
+
+}; // namespace android