Merge "Move TelephonyUtils to base/telephony"

am: 07b7384007

Change-Id: I204baf780e4637118257be6f80b0dd8229bd142f

telephony/java/com/android/internal/telephony/util/TelephonyUtils.java

@@ -0,0 +1,74 @@
+/*
+ * 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 com.android.internal.telephony.util;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.pm.ComponentInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Binder;
+import android.os.RemoteException;
+import android.os.SystemProperties;
+
+import java.io.PrintWriter;
+
+/**
+ * This class provides various util functions
+ */
+public final class TelephonyUtils {
+    public static boolean IS_USER = "user".equals(android.os.Build.TYPE);
+    public static boolean IS_DEBUGGABLE = SystemProperties.getInt("ro.debuggable", 0) == 1;
+
+    /**
+     * Verify that caller holds {@link android.Manifest.permission#DUMP}.
+     *
+     * @return true if access should be granted.
+     */
+    public static boolean checkDumpPermission(Context context, String tag, PrintWriter pw) {
+        if (context.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
+                != PackageManager.PERMISSION_GRANTED) {
+            pw.println("Permission Denial: can't dump " + tag + " from from pid="
+                    + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()
+                    + " due to missing android.permission.DUMP permission");
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    /** Returns an empty string if the input is {@code null}. */
+    public static String emptyIfNull(@Nullable String str) {
+        return str == null ? "" : str;
+    }
+
+    /** Throws a {@link RuntimeException} that wrapps the {@link RemoteException}. */
+    public static RuntimeException rethrowAsRuntimeException(RemoteException remoteException) {
+        throw new RuntimeException(remoteException);
+    }
+
+    /**
+     * Returns a {@link ComponentInfo} from the {@link ResolveInfo},
+     * or throws an {@link IllegalStateException} if not available.
+     */
+    public static ComponentInfo getComponentInfo(@NonNull ResolveInfo resolveInfo) {
+        if (resolveInfo.activityInfo != null) return resolveInfo.activityInfo;
+        if (resolveInfo.serviceInfo != null) return resolveInfo.serviceInfo;
+        if (resolveInfo.providerInfo != null) return resolveInfo.providerInfo;
+        throw new IllegalStateException("Missing ComponentInfo!");
+    }
+}