System API proxies for the telephony module
Introduce classes that exist to give the telephony module something
stable to call for in-process utilities: libcore cannot directly expose
System APIs today and the package names are internal. The APIs are the
subset of internal libcore.timezone APIs used by telephony code
currently.
Bug: 139091367
Test: See associated frameworks/opt/telephony commit
Merged-In: I6109aef77171346ecb103c190526b7b9b81012b2
Change-Id: I6109aef77171346ecb103c190526b7b9b81012b2
(cherry picked from commit 944aeffa85ab0a94e20a4edc7293fe70f904bddd)
diff --git a/core/java/android/timezone/TelephonyNetworkFinder.java b/core/java/android/timezone/TelephonyNetworkFinder.java
new file mode 100644
index 0000000..a81a516
--- /dev/null
+++ b/core/java/android/timezone/TelephonyNetworkFinder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 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.timezone;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+
+import java.util.Objects;
+
+/**
+ * A class that can find telephony networks loaded via {@link TelephonyLookup}.
+ *
+ * @hide
+ */
+@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+public class TelephonyNetworkFinder {
+
+ @NonNull
+ private final libcore.timezone.TelephonyNetworkFinder mDelegate;
+
+ TelephonyNetworkFinder(libcore.timezone.TelephonyNetworkFinder delegate) {
+ mDelegate = Objects.requireNonNull(delegate);
+ }
+
+ /**
+ * Returns information held about a specific MCC + MNC combination. It is expected for this
+ * method to return {@code null}. Only known, unusual networks will typically have information
+ * returned, e.g. if they operate in countries other than the one suggested by their MCC.
+ */
+ @Nullable
+ public TelephonyNetwork findNetworkByMccMnc(@NonNull String mcc, @NonNull String mnc) {
+ Objects.requireNonNull(mcc);
+ Objects.requireNonNull(mnc);
+
+ libcore.timezone.TelephonyNetwork telephonyNetworkDelegate =
+ mDelegate.findNetworkByMccMnc(mcc, mnc);
+ return telephonyNetworkDelegate != null
+ ? new TelephonyNetwork(telephonyNetworkDelegate) : null;
+ }
+}