ConnectivityManager: improve argument validation
Using Preconditions and dedicated static methods for checking arguments
to improve error stack traces without error messages.
Test: covered by previously added unit test
Bug: 36701874
Change-Id: Id872b2c887a4bca43a8c3644622add1c2ee57c6d
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index c96d19d..9a7ce5b 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -1466,9 +1466,7 @@
// Map from type to transports.
final int NOT_FOUND = -1;
final int transport = sLegacyTypeToTransport.get(type, NOT_FOUND);
- if (transport == NOT_FOUND) {
- throw new IllegalArgumentException("unknown legacy type: " + type);
- }
+ Preconditions.checkArgument(transport != NOT_FOUND, "unknown legacy type: " + type);
nc.addTransportType(transport);
// Map from type to capabilities.
@@ -1814,9 +1812,7 @@
*/
public void removeDefaultNetworkActiveListener(OnNetworkActiveListener l) {
INetworkActivityListener rl = mNetworkActivityListeners.get(l);
- if (rl == null) {
- throw new IllegalArgumentException("Listener not registered: " + l);
- }
+ Preconditions.checkArgument(rl != null, "Listener was not registered.");
try {
getNetworkManagementService().unregisterNetworkActivityListener(rl);
} catch (RemoteException e) {
@@ -1873,9 +1869,8 @@
/** {@hide} */
public static final void enforceTetherChangePermission(Context context, String callingPkg) {
- if (null == context || null == callingPkg) {
- throw new IllegalArgumentException("arguments should not be null");
- }
+ Preconditions.checkNotNull(context, "Context cannot be null");
+ Preconditions.checkNotNull(callingPkg, "callingPkg cannot be null");
if (context.getResources().getStringArray(
com.android.internal.R.array.config_mobile_hotspot_provision_app).length == 2) {
@@ -2773,7 +2768,7 @@
}
CallbackHandler(Handler handler) {
- this(handler.getLooper());
+ this(Preconditions.checkNotNull(handler, "Handler cannot be null.").getLooper());
}
@Override
@@ -2890,7 +2885,7 @@
private NetworkRequest sendRequestForNetwork(NetworkCapabilities need, NetworkCallback callback,
int timeoutMs, int action, int legacyType, CallbackHandler handler) {
- Preconditions.checkArgument(callback != null, "null NetworkCallback");
+ checkCallbackNotNull(callback);
Preconditions.checkArgument(action == REQUEST || need != null, "null NetworkCapabilities");
final NetworkRequest request;
try {
@@ -3042,14 +3037,11 @@
*/
public void requestNetwork(NetworkRequest request, NetworkCallback networkCallback,
int timeoutMs) {
- if (timeoutMs <= 0) {
- throw new IllegalArgumentException("Non-positive timeoutMs: " + timeoutMs);
- }
+ checkTimeout(timeoutMs);
int legacyType = inferLegacyTypeForNetworkCapabilities(request.networkCapabilities);
requestNetwork(request, networkCallback, timeoutMs, legacyType, getDefaultHandler());
}
-
/**
* Request a network to satisfy a set of {@link android.net.NetworkCapabilities}, limited
* by a timeout.
@@ -3079,9 +3071,7 @@
*/
public void requestNetwork(NetworkRequest request, NetworkCallback networkCallback,
Handler handler, int timeoutMs) {
- if (timeoutMs <= 0) {
- throw new IllegalArgumentException("Non-positive timeoutMs");
- }
+ checkTimeout(timeoutMs);
int legacyType = inferLegacyTypeForNetworkCapabilities(request.networkCapabilities);
CallbackHandler cbHandler = new CallbackHandler(handler);
requestNetwork(request, networkCallback, timeoutMs, legacyType, cbHandler);
@@ -3153,7 +3143,7 @@
* {@link NetworkCapabilities#NET_CAPABILITY_CAPTIVE_PORTAL}.
*/
public void requestNetwork(NetworkRequest request, PendingIntent operation) {
- checkPendingIntent(operation);
+ checkPendingIntentNotNull(operation);
try {
mService.pendingRequestForNetwork(request.networkCapabilities, operation);
} catch (RemoteException e) {
@@ -3176,7 +3166,7 @@
* corresponding NetworkRequest you'd like to remove. Cannot be null.
*/
public void releaseNetworkRequest(PendingIntent operation) {
- checkPendingIntent(operation);
+ checkPendingIntentNotNull(operation);
try {
mService.releasePendingNetworkRequest(operation);
} catch (RemoteException e) {
@@ -3184,10 +3174,16 @@
}
}
- private void checkPendingIntent(PendingIntent intent) {
- if (intent == null) {
- throw new IllegalArgumentException("PendingIntent cannot be null.");
- }
+ private static void checkPendingIntentNotNull(PendingIntent intent) {
+ Preconditions.checkNotNull(intent, "PendingIntent cannot be null.");
+ }
+
+ private static void checkCallbackNotNull(NetworkCallback callback) {
+ Preconditions.checkNotNull(callback, "null NetworkCallback");
+ }
+
+ private static void checkTimeout(int timeoutMs) {
+ Preconditions.checkArgumentPositive(timeoutMs, "timeoutMs must be strictly positive.");
}
/**
@@ -3257,7 +3253,7 @@
* comes from {@link PendingIntent#getBroadcast}. Cannot be null.
*/
public void registerNetworkCallback(NetworkRequest request, PendingIntent operation) {
- checkPendingIntent(operation);
+ checkPendingIntentNotNull(operation);
try {
mService.pendingListenForNetwork(request.networkCapabilities, operation);
} catch (RemoteException e) {
@@ -3301,8 +3297,9 @@
// capabilities, this request is guaranteed, at all times, to be
// satisfied by the same network, if any, that satisfies the default
// request, i.e., the system default network.
+ NetworkCapabilities nullCapabilities = null;
CallbackHandler cbHandler = new CallbackHandler(handler);
- sendRequestForNetwork(null, networkCallback, 0, REQUEST, TYPE_NONE, cbHandler);
+ sendRequestForNetwork(nullCapabilities, networkCallback, 0, REQUEST, TYPE_NONE, cbHandler);
}
/**
@@ -3339,7 +3336,7 @@
* @param networkCallback The {@link NetworkCallback} used when making the request.
*/
public void unregisterNetworkCallback(NetworkCallback networkCallback) {
- Preconditions.checkArgument(networkCallback != null, "null NetworkCallback");
+ checkCallbackNotNull(networkCallback);
final List<NetworkRequest> reqs = new ArrayList<>();
// Find all requests associated to this callback and stop callback triggers immediately.
// Callback is reusable immediately. http://b/20701525, http://b/35921499.
@@ -3375,6 +3372,7 @@
* Cannot be null.
*/
public void unregisterNetworkCallback(PendingIntent operation) {
+ checkPendingIntentNotNull(operation);
releaseNetworkRequest(operation);
}