global: get rid of nonnull gradle hack

Hacking things up via gradle is not right, and package-info.java poses problems with two modules, so instead we just apply it manually to every class. Remember to add this to new classes! Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-03-09 12:01:52 -06:00 · 2020-03-09 12:01:52 -06:00 · 8e8643122e
parent c00a0b12e4
commit 8e8643122e
77 changed files with 216 additions and 89 deletions
--- a/.gitignore
+++ b/.gitignore
@ -15,4 +15,3 @@ build/
 *.iml
 *.jks
 keystore.properties
-package-info.java
--- a/nonnull.gradle
+++ b/nonnull.gradle
@ -1,86 +0,0 @@
-/*
- * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
- * SPDX-License-Identifier: Apache-2.0
- */
-
-task generateNonNullJavaFiles(dependsOn: "assembleDebug", type: Copy) {
-    group = "Copying"
-    description = "Generate package-info.java classes"
-
-    def basePackage = "com" + File.separatorChar + "wireguard"
-    def mainSrcPhrase = "src" + File.separatorChar + "main" + File.separatorChar +
-            "java" + File.separatorChar
-    def mainTestSrcPhrase = "src" + File.separatorChar + "test" + File.separatorChar +
-            "java" + File.separatorChar
-    def mainAndroidTestSrcPhrase = "src" + File.separatorChar + "androidTest" + File.separatorChar +
-            "java" + File.separatorChar
-
-    def sourceDir = file( "${projectDir}" + File.separatorChar + "src" + File.separatorChar +
-            "main" + File.separatorChar + "java" + File.separatorChar +
-            basePackage )
-    def testSourceDir = file( "${projectDir}" + File.separatorChar + "src" + File.separatorChar +
-            "test" + File.separatorChar + "java" + File.separatorChar +
-            basePackage)
-    def androidTestSourceDir = file( "${projectDir}" + File.separatorChar + "src" + File
-            .separatorChar +
-            "androidTest" + File.separatorChar + "java" + File.separatorChar +
-            basePackage )
-
-    generateInfoFiles(sourceDir, mainSrcPhrase)
-    sourceDir.eachDirRecurse { dir ->
-        generateInfoFiles(dir, mainSrcPhrase)
-    }
-    if (file(testSourceDir).exists()) {
-        generateInfoFiles(testSourceDir, mainTestSrcPhrase)
-        testSourceDir.eachDirRecurse { dir ->
-            generateInfoFiles(dir, mainTestSrcPhrase)
-        }
-    }
-    if (file(androidTestSourceDir).exists()) {
-        generateInfoFiles(androidTestSourceDir, mainAndroidTestSrcPhrase)
-        androidTestSourceDir.eachDirRecurse { dir ->
-            generateInfoFiles(dir, mainAndroidTestSrcPhrase)
-        }
-    }
-    println "[SUCCESS] NonNull generator: package-info.java files checked"
-}
-
-private void generateInfoFiles(File dir, String mainSrcPhrase) {
-    def infoFileContentHeader = getFileContentHeader()
-    def infoFileContentFooter = getFileContentFooter()
-    def infoFilePath = dir.getAbsolutePath() + File.separatorChar + "package-info.java"
-
-    //file(infoFilePath).delete(); //do not use in production code
-    if (!file(infoFilePath).exists()) {
-        def infoFileContentPackage = getFileContentPackage(dir.getAbsolutePath(), mainSrcPhrase)
-        new File(infoFilePath).write(infoFileContentHeader +
-                infoFileContentPackage + infoFileContentFooter)
-        println "[dir] " + infoFilePath + "  created"
-    }
-}
-
-static def getFileContentPackage(String path, String mainSrcPhrase) {
-    def mainSrcPhraseIndex = path.indexOf(mainSrcPhrase)
-    def output = path.substring(mainSrcPhraseIndex)
-
-    // Win hotfix
-    if (System.properties['os.name'].toLowerCase().contains('windows')) {
-        output = output.replace("\\", "/")
-        mainSrcPhrase = mainSrcPhrase.replace("\\", "/")
-    }
-
-    return "package " + output.replaceAll(mainSrcPhrase, "").replaceAll(
-                "/", ".") + ";\n"
-}
-
-static def getFileContentHeader() {
-    return  "/**\n" +
-            " * Make all method parameters @NonNull by default.\n" +
-            " */\n" +
-            "@NonNullForAll\n"
-}
-
-static def getFileContentFooter() {
-    return  "\n" +
-            "import com.wireguard.util.NonNullForAll;\n"
-}
--- a/tunnel/build.gradle
+++ b/tunnel/build.gradle
@ -1,5 +1,4 @@
 apply plugin: 'com.android.library'
-apply from: rootProject.file('nonnull.gradle')

 android {
    buildToolsVersion '29.0.3'
--- a/tunnel/src/main/java/com/wireguard/android/backend/Backend.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/Backend.java
@ -5,6 +5,8 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
 import com.wireguard.config.Config;

 import java.util.Collection;
@ -16,6 +18,7 @@ import androidx.annotation.Nullable;
 * Interface for implementations of the WireGuard secure network tunnel.
 */

+@NonNullForAll
 public interface Backend {
    /**
     * Enumerate names of currently-running tunnels.
--- a/tunnel/src/main/java/com/wireguard/android/backend/BackendException.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/BackendException.java
@ -5,6 +5,9 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
+@NonNullForAll
 public final class BackendException extends Exception {
    public enum Reason {
        UNKNOWN_KERNEL_MODULE_NAME,
--- a/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
@ -5,6 +5,8 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
@ -30,6 +32,7 @@ import java.util.concurrent.TimeoutException;

 import java9.util.concurrent.CompletableFuture;

+@NonNullForAll
 public final class GoBackend implements Backend {
    private static final String TAG = "WireGuard/" + GoBackend.class.getSimpleName();
    private static CompletableFuture<VpnService> vpnService = new CompletableFuture<>();
--- a/tunnel/src/main/java/com/wireguard/android/backend/Statistics.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/Statistics.java
@ -5,6 +5,8 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
 import android.os.SystemClock;
 import android.util.Pair;

@ -13,6 +15,7 @@ import com.wireguard.crypto.Key;
 import java.util.HashMap;
 import java.util.Map;

+@NonNullForAll
 public class Statistics {
    private long lastTouched = SystemClock.elapsedRealtime();
    private final Map<Key, Pair<Long, Long>> peerBytes = new HashMap<>();
--- a/tunnel/src/main/java/com/wireguard/android/backend/Tunnel.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/Tunnel.java
@ -5,12 +5,15 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
 import java.util.regex.Pattern;

 /**
 * Represents a WireGuard tunnel.
 */

+@NonNullForAll
 public interface Tunnel {
    enum State {
        DOWN,
--- a/tunnel/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
@ -5,6 +5,8 @@

 package com.wireguard.android.backend;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import android.content.Context;
@ -39,6 +41,7 @@ import java9.util.stream.Stream;
 * WireGuard backend that uses {@code wg-quick} to implement tunnel configuration.
 */

+@NonNullForAll
 public final class WgQuickBackend implements Backend {
    private static final String TAG = "WireGuard/" + WgQuickBackend.class.getSimpleName();

--- a/tunnel/src/main/java/com/wireguard/android/util/ModuleLoader.java
+++ b/tunnel/src/main/java/com/wireguard/android/util/ModuleLoader.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.system.OsConstants;
 import android.util.Base64;
@ -36,6 +38,7 @@ import java.util.Map;

 import androidx.annotation.Nullable;

+@NonNullForAll
 public class ModuleLoader {
    private static final String MODULE_PUBLIC_KEY_BASE64 = "RWRmHuT9PSqtwfsLtEx+QS06BJtLgFYteL9WCNjH7yuyu5Y1DieSN7If";
    private static final String MODULE_LIST_URL = "https://download.wireguard.com/android-module/modules.txt.sig";
--- a/tunnel/src/main/java/com/wireguard/android/util/RootShell.java
+++ b/tunnel/src/main/java/com/wireguard/android/util/RootShell.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import androidx.annotation.Nullable;
 import android.util.Log;
@ -24,6 +26,7 @@ import java.util.UUID;
 * Helper class for running commands as root.
 */

+@NonNullForAll
 public class RootShell {
    private static final String SU = "su";
    private static final String TAG = "WireGuard/" + RootShell.class.getSimpleName();
--- a/tunnel/src/main/java/com/wireguard/android/util/SharedLibraryLoader.java
+++ b/tunnel/src/main/java/com/wireguard/android/util/SharedLibraryLoader.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.os.Build;
 import android.util.Log;
@ -19,6 +21,7 @@ import java.util.HashSet;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;

+@NonNullForAll
 public final class SharedLibraryLoader {
    private static final String TAG = "WireGuard/" + SharedLibraryLoader.class.getSimpleName();

--- a/tunnel/src/main/java/com/wireguard/android/util/ToolsInstaller.java
+++ b/tunnel/src/main/java/com/wireguard/android/util/ToolsInstaller.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import androidx.annotation.Nullable;
 import android.system.OsConstants;
@ -22,6 +24,7 @@ import java.util.List;
 * Helper to install WireGuard tools to the system partition.
 */

+@NonNullForAll
 public final class ToolsInstaller {
    public static final int ERROR = 0x0;
    public static final int MAGISK = 0x4;
--- a/tunnel/src/main/java/com/wireguard/config/Attribute.java
+++ b/tunnel/src/main/java/com/wireguard/config/Attribute.java
@ -5,12 +5,15 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import java.util.Iterator;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 import java9.util.Optional;

+@NonNullForAll
 public final class Attribute {
    private static final Pattern LINE_PATTERN = Pattern.compile("(\\w+)\\s*=\\s*([^\\s#][^#]*)");
    private static final Pattern LIST_SEPARATOR = Pattern.compile("\\s*,\\s*");
--- a/tunnel/src/main/java/com/wireguard/config/BadConfigException.java
+++ b/tunnel/src/main/java/com/wireguard/config/BadConfigException.java
@ -5,10 +5,13 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import com.wireguard.crypto.KeyFormatException;

+@NonNullForAll
 public class BadConfigException extends Exception {
    private final Location location;
    private final Reason reason;
--- a/tunnel/src/main/java/com/wireguard/config/Config.java
+++ b/tunnel/src/main/java/com/wireguard/config/Config.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import com.wireguard.config.BadConfigException.Location;
@ -29,6 +31,7 @@ import java.util.Set;
 * <p>
 * Instances of this class are immutable.
 */
+@NonNullForAll
 public final class Config {
    private final Interface interfaze;
    private final List<Peer> peers;
--- a/tunnel/src/main/java/com/wireguard/config/InetAddresses.java
+++ b/tunnel/src/main/java/com/wireguard/config/InetAddresses.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import java.lang.reflect.Method;
 import java.net.Inet4Address;
 import java.net.Inet6Address;
@ -17,6 +19,7 @@ import androidx.annotation.Nullable;
 /**
 * Utility methods for creating instances of {@link InetAddress}.
 */
+@NonNullForAll
 public final class InetAddresses {
    @Nullable private static final Method PARSER_METHOD;
    private static final Pattern WONT_TOUCH_RESOLVER = Pattern.compile("^(((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:)))(%.+)?)|((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))$");
--- a/tunnel/src/main/java/com/wireguard/config/InetEndpoint.java
+++ b/tunnel/src/main/java/com/wireguard/config/InetEndpoint.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import org.threeten.bp.Duration;
@ -25,6 +27,7 @@ import java9.util.Optional;
 * <p>
 * Instances of this class are externally immutable.
 */
+@NonNullForAll
 public final class InetEndpoint {
    private static final Pattern BARE_IPV6 = Pattern.compile("^[^\\[\\]]*:[^\\[\\]]*");
    private static final Pattern FORBIDDEN_CHARACTERS = Pattern.compile("[/?#]");
--- a/tunnel/src/main/java/com/wireguard/config/InetNetwork.java
+++ b/tunnel/src/main/java/com/wireguard/config/InetNetwork.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import java.net.Inet4Address;
 import java.net.InetAddress;

@ -13,6 +15,7 @@ import java.net.InetAddress;
 * <p>
 * Instances of this class are immutable.
 */
+@NonNullForAll
 public final class InetNetwork {
    private final InetAddress address;
    private final int mask;
--- a/tunnel/src/main/java/com/wireguard/config/Interface.java
+++ b/tunnel/src/main/java/com/wireguard/config/Interface.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import com.wireguard.config.BadConfigException.Location;
@ -35,6 +37,7 @@ import java9.util.stream.StreamSupport;
 * <p>
 * Instances of this class are immutable.
 */
+@NonNullForAll
 public final class Interface {
    private static final int MAX_UDP_PORT = 65535;
    private static final int MIN_UDP_PORT = 0;
--- a/tunnel/src/main/java/com/wireguard/config/ParseException.java
+++ b/tunnel/src/main/java/com/wireguard/config/ParseException.java
@ -5,10 +5,13 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 /**
 */
+@NonNullForAll
 public class ParseException extends Exception {
    private final Class<?> parsingClass;
    private final CharSequence text;
--- a/tunnel/src/main/java/com/wireguard/config/Peer.java
+++ b/tunnel/src/main/java/com/wireguard/config/Peer.java
@ -5,6 +5,8 @@

 package com.wireguard.config;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import com.wireguard.config.BadConfigException.Location;
@ -28,6 +30,7 @@ import java9.util.Optional;
 * <p>
 * Instances of this class are immutable.
 */
+@NonNullForAll
 public final class Peer {
    private final Set<InetNetwork> allowedIps;
    private final Optional<InetEndpoint> endpoint;
--- a/tunnel/src/main/java/com/wireguard/crypto/Curve25519.java
+++ b/tunnel/src/main/java/com/wireguard/crypto/Curve25519.java
@ -6,6 +6,8 @@

 package com.wireguard.crypto;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import java.util.Arrays;
@ -25,6 +27,7 @@ import java.util.Arrays;
 * References: http://cr.yp.to/ecdh.html, RFC 7748
 */
@SuppressWarnings({"MagicNumber", "NonConstantFieldWithUpperCaseName", "SuspiciousNameCombination"})
+@NonNullForAll
 public final class Curve25519 {
    // Numbers modulo 2^255 - 19 are broken up into ten 26-bit words.
    private static final int NUM_LIMBS_255BIT = 10;
--- a/tunnel/src/main/java/com/wireguard/crypto/Key.java
+++ b/tunnel/src/main/java/com/wireguard/crypto/Key.java
@ -5,6 +5,8 @@

 package com.wireguard.crypto;

+import com.wireguard.util.NonNullForAll;
+
 import com.wireguard.crypto.KeyFormatException.Type;

 import java.security.MessageDigest;
@ -18,6 +20,7 @@ import java.util.Arrays;
 * Instances of this class are immutable.
 */
@SuppressWarnings("MagicNumber")
+@NonNullForAll
 public final class Key {
    private final byte[] key;

--- a/tunnel/src/main/java/com/wireguard/crypto/KeyFormatException.java
+++ b/tunnel/src/main/java/com/wireguard/crypto/KeyFormatException.java
@ -5,11 +5,14 @@

 package com.wireguard.crypto;

+import com.wireguard.util.NonNullForAll;
+
 /**
 * An exception thrown when attempting to parse an invalid key (too short, too long, or byte
 * data inappropriate for the format). The format being parsed can be accessed with the
 * {@link #getFormat} method.
 */
+@NonNullForAll
 public final class KeyFormatException extends Exception {
    private final Key.Format format;
    private final Type type;
--- a/tunnel/src/main/java/com/wireguard/crypto/KeyPair.java
+++ b/tunnel/src/main/java/com/wireguard/crypto/KeyPair.java
@ -5,11 +5,14 @@

 package com.wireguard.crypto;

+import com.wireguard.util.NonNullForAll;
+
 /**
 * Represents a Curve25519 key pair as used by WireGuard.
 * <p>
 * Instances of this class are immutable.
 */
+@NonNullForAll
 public class KeyPair {
    private final Key privateKey;
    private final Key publicKey;
--- a/tunnel/src/main/java/com/wireguard/util/NonNullForAll.java
+++ b/tunnel/src/main/java/com/wireguard/util/NonNullForAll.java
@ -22,5 +22,6 @@ import javax.annotation.meta.TypeQualifierDefault;
@Nonnull
@TypeQualifierDefault({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
+
 public @interface NonNullForAll {
 }
--- a/ui/build.gradle
+++ b/ui/build.gradle
@ -1,6 +1,5 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply from: rootProject.file('nonnull.gradle')

 // Create a variable called keystorePropertiesFile, and initialize it to your
 // keystore.properties file, in the rootProject folder.
--- a/ui/src/main/java/com/wireguard/android/Application.java
+++ b/ui/src/main/java/com/wireguard/android/Application.java
@ -5,6 +5,8 @@

 package com.wireguard.android;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@ -35,6 +37,7 @@ import java.util.Locale;

 import java9.util.concurrent.CompletableFuture;

+@NonNullForAll
 public class Application extends android.app.Application implements SharedPreferences.OnSharedPreferenceChangeListener {
    private static final String TAG = "WireGuard/" + Application.class.getSimpleName();
    public static final String USER_AGENT = String.format(Locale.ENGLISH, "WireGuard/%s (Android %d; %s; %s; %s %s; %s)", BuildConfig.VERSION_NAME, Build.VERSION.SDK_INT, Build.SUPPORTED_ABIS.length > 0 ? Build.SUPPORTED_ABIS[0] : "unknown ABI", Build.BOARD, Build.MANUFACTURER, Build.MODEL, Build.FINGERPRINT);
--- a/ui/src/main/java/com/wireguard/android/BootShutdownReceiver.java
+++ b/ui/src/main/java/com/wireguard/android/BootShutdownReceiver.java
@ -5,6 +5,8 @@

 package com.wireguard.android;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@ -14,6 +16,7 @@ import com.wireguard.android.backend.WgQuickBackend;
 import com.wireguard.android.model.TunnelManager;
 import com.wireguard.android.util.ExceptionLoggers;

+@NonNullForAll
 public class BootShutdownReceiver extends BroadcastReceiver {
    private static final String TAG = "WireGuard/" + BootShutdownReceiver.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/QuickTileService.java
+++ b/ui/src/main/java/com/wireguard/android/QuickTileService.java
@ -5,6 +5,8 @@

 package com.wireguard.android;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Intent;
 import androidx.databinding.Observable;
 import androidx.databinding.Observable.OnPropertyChangedCallback;
@ -34,6 +36,7 @@ import java.util.Objects;
 */

@RequiresApi(Build.VERSION_CODES.N)
+@NonNullForAll
 public class QuickTileService extends TileService {
    private static final String TAG = "WireGuard/" + QuickTileService.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/activity/BaseActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/BaseActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.CallbackRegistry;
 import androidx.databinding.CallbackRegistry.NotifierCallback;
 import android.os.Bundle;
@ -19,6 +21,7 @@ import java.util.Objects;
 * Base class for activities that need to remember the currently-selected tunnel.
 */

+@NonNullForAll
 public abstract class BaseActivity extends ThemeChangeAwareActivity {
    private static final String KEY_SELECTED_TUNNEL = "selected_tunnel";

--- a/ui/src/main/java/com/wireguard/android/activity/MainActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/MainActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.os.Bundle;
@ -31,6 +33,7 @@ import java.util.List;
 * editing the configuration and interface state of WireGuard tunnels.
 */

+@NonNullForAll
 public class MainActivity extends BaseActivity
        implements FragmentManager.OnBackStackChangedListener {
    @Nullable private ActionBar actionBar;
--- a/ui/src/main/java/com/wireguard/android/activity/SettingsActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/SettingsActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.Bundle;
@ -30,6 +32,7 @@ import java.util.List;
 * Interface for changing application-global persistent settings.
 */

+@NonNullForAll
 public class SettingsActivity extends ThemeChangeAwareActivity {
    private final SparseArray<PermissionRequestCallback> permissionRequestCallbacks = new SparseArray<>();
    private int permissionRequestCounter;
--- a/ui/src/main/java/com/wireguard/android/activity/ThemeChangeAwareActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/ThemeChangeAwareActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Build;
@ -18,6 +20,7 @@ import com.wireguard.android.Application;

 import java.lang.reflect.Field;

+@NonNullForAll
 public abstract class ThemeChangeAwareActivity extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
    private static final String TAG = "WireGuard/" + ThemeChangeAwareActivity.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/activity/TunnelCreatorActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/TunnelCreatorActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import android.os.Bundle;
 import androidx.annotation.Nullable;

@ -15,6 +17,7 @@ import com.wireguard.android.model.ObservableTunnel;
 * Standalone activity for creating tunnels.
 */

+@NonNullForAll
 public class TunnelCreatorActivity extends BaseActivity {
    @Override
    @SuppressWarnings("UnnecessaryFullyQualifiedName")
--- a/ui/src/main/java/com/wireguard/android/activity/TunnelToggleActivity.java
+++ b/ui/src/main/java/com/wireguard/android/activity/TunnelToggleActivity.java
@ -5,6 +5,8 @@

 package com.wireguard.android.activity;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AppCompatActivity;
@ -24,6 +26,7 @@ import com.wireguard.android.backend.Tunnel.State;
 import com.wireguard.android.util.ErrorMessages;

@RequiresApi(Build.VERSION_CODES.N)
+@NonNullForAll
 public class TunnelToggleActivity extends AppCompatActivity {
    private static final String TAG = "WireGuard/" + TunnelToggleActivity.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/configStore/ConfigStore.java
+++ b/ui/src/main/java/com/wireguard/android/configStore/ConfigStore.java
@ -5,6 +5,8 @@

 package com.wireguard.android.configStore;

+import com.wireguard.util.NonNullForAll;
+
 import com.wireguard.config.Config;

 import java.util.Set;
@ -13,6 +15,7 @@ import java.util.Set;
 * Interface for persistent storage providers for WireGuard configurations.
 */

+@NonNullForAll
 public interface ConfigStore {
    /**
     * Create a persistent tunnel, which must have a unique name within the persistent storage
--- a/ui/src/main/java/com/wireguard/android/configStore/FileConfigStore.java
+++ b/ui/src/main/java/com/wireguard/android/configStore/FileConfigStore.java
@ -5,6 +5,8 @@

 package com.wireguard.android.configStore;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.util.Log;

@ -27,6 +29,7 @@ import java9.util.stream.Stream;
 * Configuration store that uses a {@code wg-quick}-style file for each configured tunnel.
 */

+@NonNullForAll
 public final class FileConfigStore implements ConfigStore {
    private static final String TAG = "WireGuard/" + FileConfigStore.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.java
+++ b/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.java
@ -5,6 +5,8 @@

 package com.wireguard.android.databinding;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.BindingAdapter;
 import androidx.databinding.DataBindingUtil;
 import androidx.databinding.ObservableList;
@ -35,6 +37,7 @@ import java9.util.Optional;
 */

@SuppressWarnings("unused")
+@NonNullForAll
 public final class BindingAdapters {
    private BindingAdapters() {
        // Prevent instantiation.
--- a/ui/src/main/java/com/wireguard/android/databinding/ItemChangeListener.java
+++ b/ui/src/main/java/com/wireguard/android/databinding/ItemChangeListener.java
@ -5,6 +5,8 @@

 package com.wireguard.android.databinding;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.DataBindingUtil;
 import androidx.databinding.ObservableList;
 import androidx.databinding.ViewDataBinding;
@ -22,6 +24,7 @@ import java.util.Objects;
 * Helper class for binding an ObservableList to the children of a ViewGroup.
 */

+@NonNullForAll
 class ItemChangeListener<T> {
    private final OnListChangedCallback<T> callback = new OnListChangedCallback<>(this);
    private final ViewGroup container;
--- a/ui/src/main/java/com/wireguard/android/databinding/ObservableKeyedRecyclerViewAdapter.java
+++ b/ui/src/main/java/com/wireguard/android/databinding/ObservableKeyedRecyclerViewAdapter.java
@ -5,6 +5,8 @@

 package com.wireguard.android.databinding;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import androidx.databinding.DataBindingUtil;
 import androidx.databinding.ObservableList;
@ -25,6 +27,7 @@ import java.lang.ref.WeakReference;
 * A generic {@code RecyclerView.Adapter} backed by a {@code ObservableKeyedList}.
 */

+@NonNullForAll
 public class ObservableKeyedRecyclerViewAdapter<K, E extends Keyed<? extends K>> extends Adapter<ObservableKeyedRecyclerViewAdapter.ViewHolder> {

    private final OnListChangedCallback<E> callback = new OnListChangedCallback<>(this);
--- a/ui/src/main/java/com/wireguard/android/fragment/AppListDialogFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/AppListDialogFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.app.Activity;
 import android.app.Dialog;
 import android.content.DialogInterface;
@ -34,6 +36,7 @@ import java9.util.Comparators;
 import java9.util.stream.Collectors;
 import java9.util.stream.StreamSupport;

+@NonNullForAll
 public class AppListDialogFragment extends DialogFragment {

    private static final String KEY_EXCLUDED_APPS = "excludedApps";
--- a/ui/src/main/java/com/wireguard/android/fragment/BaseFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/BaseFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.content.Intent;
 import androidx.databinding.DataBindingUtil;
@ -32,6 +34,7 @@ import com.wireguard.android.util.ErrorMessages;
 * attached to a {@code BaseActivity}.
 */

+@NonNullForAll
 public abstract class BaseFragment extends Fragment implements OnSelectedTunnelChangedListener {
    private static final int REQUEST_CODE_VPN_PERMISSION = 23491;
    private static final String TAG = "WireGuard/" + BaseFragment.class.getSimpleName();
--- a/ui/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.app.Activity;
 import android.app.Dialog;
 import android.content.Context;
@ -26,6 +28,7 @@ import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.Objects;

+@NonNullForAll
 public class ConfigNamingDialogFragment extends DialogFragment {
    private static final String KEY_CONFIG_TEXT = "config_text";

--- a/ui/src/main/java/com/wireguard/android/fragment/TunnelDetailFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/TunnelDetailFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.os.Bundle;
 import androidx.annotation.Nullable;
 import androidx.databinding.DataBindingUtil;
@ -30,6 +32,7 @@ import java.util.TimerTask;
 * Fragment that shows details about a specific tunnel.
 */

+@NonNullForAll
 public class TunnelDetailFragment extends BaseFragment {
    @Nullable private TunnelDetailFragmentBinding binding;
    @Nullable private Timer timer;
--- a/ui/src/main/java/com/wireguard/android/fragment/TunnelEditorFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/TunnelEditorFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.app.Activity;
 import android.content.Context;
 import androidx.databinding.ObservableList;
@ -41,6 +43,7 @@ import java.util.Objects;
 * Fragment for editing a WireGuard configuration.
 */

+@NonNullForAll
 public class TunnelEditorFragment extends BaseFragment implements AppExclusionListener {
    private static final String KEY_LOCAL_CONFIG = "local_config";
    private static final String KEY_ORIGINAL_NAME = "original_name";
--- a/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java
+++ b/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java
@ -5,6 +5,8 @@

 package com.wireguard.android.fragment;

+import com.wireguard.util.NonNullForAll;
+
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.ContentResolver;
@ -64,6 +66,7 @@ import java9.util.stream.StreamSupport;
 * Fragment containing a list of known WireGuard tunnels. It allows creating and deleting tunnels.
 */

+@NonNullForAll
 public class TunnelListFragment extends BaseFragment {
    public static final int REQUEST_IMPORT = 1;
    private static final int REQUEST_TARGET_FRAGMENT = 2;
--- a/ui/src/main/java/com/wireguard/android/model/ApplicationData.java
+++ b/ui/src/main/java/com/wireguard/android/model/ApplicationData.java
@ -5,6 +5,8 @@

 package com.wireguard.android.model;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.BaseObservable;
 import androidx.databinding.Bindable;
 import android.graphics.drawable.Drawable;
@ -12,6 +14,7 @@ import android.graphics.drawable.Drawable;
 import com.wireguard.android.BR;
 import com.wireguard.util.Keyed;

+@NonNullForAll
 public class ApplicationData extends BaseObservable implements Keyed<String> {
    private final Drawable icon;
    private final String name;
--- a/ui/src/main/java/com/wireguard/android/model/ObservableTunnel.java
+++ b/ui/src/main/java/com/wireguard/android/model/ObservableTunnel.java
@ -5,6 +5,8 @@

 package com.wireguard.android.model;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.BaseObservable;
 import androidx.databinding.Bindable;
 import androidx.annotation.Nullable;
@ -23,6 +25,7 @@ import java9.util.concurrent.CompletionStage;
 * Encapsulates the volatile and nonvolatile state of a WireGuard tunnel.
 */

+@NonNullForAll
 public class ObservableTunnel extends BaseObservable implements Keyed<String>, Tunnel {
    private final TunnelManager manager;
    @Nullable private Config config;
--- a/ui/src/main/java/com/wireguard/android/model/TunnelManager.java
+++ b/ui/src/main/java/com/wireguard/android/model/TunnelManager.java
@ -5,6 +5,8 @@

 package com.wireguard.android.model;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@ -39,6 +41,7 @@ import java9.util.stream.StreamSupport;
 * Maintains and mediates changes to the set of available WireGuard tunnels,
 */

+@NonNullForAll
 public final class TunnelManager extends BaseObservable {
    private static final Comparator<String> COMPARATOR = Comparators.<String>thenComparing(
            String.CASE_INSENSITIVE_ORDER, Comparators.naturalOrder());
--- a/ui/src/main/java/com/wireguard/android/preference/LogExporterPreference.java
+++ b/ui/src/main/java/com/wireguard/android/preference/LogExporterPreference.java
@ -5,6 +5,8 @@

 package com.wireguard.android.preference;

+import com.wireguard.util.NonNullForAll;
+
 import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
@ -29,6 +31,7 @@ import java.io.InputStreamReader;
 * Preference implementing a button that asynchronously exports logs.
 */

+@NonNullForAll
 public class LogExporterPreference extends Preference {
    private static final String TAG = "WireGuard/" + LogExporterPreference.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/preference/ModuleDownloaderPreference.java
+++ b/ui/src/main/java/com/wireguard/android/preference/ModuleDownloaderPreference.java
@ -5,6 +5,8 @@

 package com.wireguard.android.preference;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.content.Intent;
 import android.system.OsConstants;
@ -18,6 +20,7 @@ import com.wireguard.android.util.ErrorMessages;
 import androidx.annotation.Nullable;
 import androidx.preference.Preference;

+@NonNullForAll
 public class ModuleDownloaderPreference extends Preference {
    private State state = State.INITIAL;

--- a/ui/src/main/java/com/wireguard/android/preference/ToolsInstallerPreference.java
+++ b/ui/src/main/java/com/wireguard/android/preference/ToolsInstallerPreference.java
@ -5,6 +5,8 @@

 package com.wireguard.android.preference;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import androidx.annotation.Nullable;
 import androidx.preference.Preference;
@ -19,6 +21,7 @@ import com.wireguard.android.util.ToolsInstaller;
 * result as the preference summary.
 */

+@NonNullForAll
 public class ToolsInstallerPreference extends Preference {
    private State state = State.INITIAL;

--- a/ui/src/main/java/com/wireguard/android/preference/VersionPreference.java
+++ b/ui/src/main/java/com/wireguard/android/preference/VersionPreference.java
@ -5,6 +5,8 @@

 package com.wireguard.android.preference;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
@ -22,6 +24,7 @@ import com.wireguard.android.backend.WgQuickBackend;

 import java.util.Locale;

+@NonNullForAll
 public class VersionPreference extends Preference {
    @Nullable private String versionSummary;

--- a/ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java
+++ b/ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java
@ -5,6 +5,8 @@

 package com.wireguard.android.preference;

+import com.wireguard.util.NonNullForAll;
+
 import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
@ -35,6 +37,7 @@ import java9.util.concurrent.CompletableFuture;
 * Preference implementing a button that asynchronously exports config zips.
 */

+@NonNullForAll
 public class ZipExporterPreference extends Preference {
    private static final String TAG = "WireGuard/" + ZipExporterPreference.class.getSimpleName();

--- a/ui/src/main/java/com/wireguard/android/util/AsyncWorker.java
+++ b/ui/src/main/java/com/wireguard/android/util/AsyncWorker.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.os.Handler;

 import java.util.concurrent.Executor;
@ -16,6 +18,7 @@ import java9.util.concurrent.CompletionStage;
 * Helper class for running asynchronous tasks and ensuring they are completed on the main thread.
 */

+@NonNullForAll
 public class AsyncWorker {
    private final Executor executor;
    private final Handler handler;
--- a/ui/src/main/java/com/wireguard/android/util/ClipboardUtils.java
+++ b/ui/src/main/java/com/wireguard/android/util/ClipboardUtils.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
@ -16,6 +18,7 @@ import android.widget.TextView;
 * Standalone utilities for interacting with the system clipboard.
 */

+@NonNullForAll
 public final class ClipboardUtils {
    private ClipboardUtils() {
        // Prevent instantiation
--- a/ui/src/main/java/com/wireguard/android/util/DownloadsFileSaver.java
+++ b/ui/src/main/java/com/wireguard/android/util/DownloadsFileSaver.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
@ -22,6 +24,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;

+@NonNullForAll
 public class DownloadsFileSaver {

    public static class DownloadsFile {
--- a/ui/src/main/java/com/wireguard/android/util/ErrorMessages.java
+++ b/ui/src/main/java/com/wireguard/android/util/ErrorMessages.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.res.Resources;
 import android.os.RemoteException;

@ -29,6 +31,7 @@ import java.util.Map;

 import java9.util.Maps;

+@NonNullForAll
 public final class ErrorMessages {
    private static final Map<BadConfigException.Reason, Integer> BCE_REASON_MAP = new EnumMap<>(Maps.of(
            BadConfigException.Reason.INVALID_KEY, R.string.bad_config_reason_invalid_key,
--- a/ui/src/main/java/com/wireguard/android/util/ExceptionLoggers.java
+++ b/ui/src/main/java/com/wireguard/android/util/ExceptionLoggers.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;
 import android.util.Log;

--- a/ui/src/main/java/com/wireguard/android/util/FragmentUtils.java
+++ b/ui/src/main/java/com/wireguard/android/util/FragmentUtils.java
@ -4,12 +4,15 @@
 */
 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import androidx.preference.Preference;
 import android.view.ContextThemeWrapper;

 import com.wireguard.android.activity.SettingsActivity;

+@NonNullForAll
 public final class FragmentUtils {
    private FragmentUtils() {
        // Prevent instantiation
--- a/ui/src/main/java/com/wireguard/android/util/ObservableKeyedArrayList.java
+++ b/ui/src/main/java/com/wireguard/android/util/ObservableKeyedArrayList.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.ObservableArrayList;
 import androidx.annotation.Nullable;

@ -21,6 +23,7 @@ import java.util.Objects;
 * operations, require O(n) time.
 */

+@NonNullForAll
 public class ObservableKeyedArrayList<K, E extends Keyed<? extends K>>
        extends ObservableArrayList<E> implements ObservableKeyedList<K, E> {
    @Override
--- a/ui/src/main/java/com/wireguard/android/util/ObservableKeyedList.java
+++ b/ui/src/main/java/com/wireguard/android/util/ObservableKeyedList.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.ObservableList;

 import com.wireguard.util.Keyed;
@ -14,6 +16,7 @@ import com.wireguard.util.KeyedList;
 * A list that is both keyed and observable.
 */

+@NonNullForAll
 public interface ObservableKeyedList<K, E extends Keyed<? extends K>>
        extends KeyedList<K, E>, ObservableList<E> {
 }
--- a/ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedArrayList.java
+++ b/ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedArrayList.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import com.wireguard.util.Keyed;
@ -26,6 +28,7 @@ import java.util.Spliterator;
 * key still require O(n) time.
 */

+@NonNullForAll
 public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
        extends ObservableKeyedArrayList<K, E> implements ObservableSortedKeyedList<K, E> {
    @Nullable private final Comparator<? super K> comparator;
--- a/ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedList.java
+++ b/ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedList.java
@ -5,6 +5,8 @@

 package com.wireguard.android.util;

+import com.wireguard.util.NonNullForAll;
+
 import com.wireguard.util.Keyed;
 import com.wireguard.util.SortedKeyedList;

@ -12,6 +14,7 @@ import com.wireguard.util.SortedKeyedList;
 * A list that is both sorted/keyed and observable.
 */

+@NonNullForAll
 public interface ObservableSortedKeyedList<K, E extends Keyed<? extends K>>
        extends ObservableKeyedList<K, E>, SortedKeyedList<K, E> {
 }
--- a/ui/src/main/java/com/wireguard/android/viewmodel/ConfigProxy.java
+++ b/ui/src/main/java/com/wireguard/android/viewmodel/ConfigProxy.java
@ -5,6 +5,8 @@

 package com.wireguard.android.viewmodel;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.ObservableArrayList;
 import androidx.databinding.ObservableList;
 import android.os.Parcel;
@ -17,6 +19,7 @@ import com.wireguard.config.Peer;
 import java.util.ArrayList;
 import java.util.Collection;

+@NonNullForAll
 public class ConfigProxy implements Parcelable {
    public static final Parcelable.Creator<ConfigProxy> CREATOR = new ConfigProxyCreator();

--- a/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.java
+++ b/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.java
@ -5,6 +5,8 @@

 package com.wireguard.android.viewmodel;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.BaseObservable;
 import androidx.databinding.Bindable;
 import androidx.databinding.ObservableArrayList;
@ -26,6 +28,7 @@ import java.util.List;
 import java9.util.stream.Collectors;
 import java9.util.stream.StreamSupport;

+@NonNullForAll
 public class InterfaceProxy extends BaseObservable implements Parcelable {
    public static final Parcelable.Creator<InterfaceProxy> CREATOR = new InterfaceProxyCreator();

--- a/ui/src/main/java/com/wireguard/android/viewmodel/PeerProxy.java
+++ b/ui/src/main/java/com/wireguard/android/viewmodel/PeerProxy.java
@ -5,6 +5,8 @@

 package com.wireguard.android.viewmodel;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.databinding.BaseObservable;
 import androidx.databinding.Bindable;
 import androidx.databinding.Observable;
@ -32,6 +34,7 @@ import java9.util.Sets;
 import java9.util.stream.Collectors;
 import java9.util.stream.Stream;

+@NonNullForAll
 public class PeerProxy extends BaseObservable implements Parcelable {
    public static final Parcelable.Creator<PeerProxy> CREATOR = new PeerProxyCreator();
    private static final Set<String> IPV4_PUBLIC_NETWORKS = new LinkedHashSet<>(Lists.of(
--- a/ui/src/main/java/com/wireguard/android/widget/KeyInputFilter.java
+++ b/ui/src/main/java/com/wireguard/android/widget/KeyInputFilter.java
@ -5,6 +5,8 @@

 package com.wireguard.android.widget;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;
 import android.text.InputFilter;
 import android.text.SpannableStringBuilder;
@ -16,6 +18,7 @@ import com.wireguard.crypto.Key;
 * InputFilter for entering WireGuard private/public keys encoded with base64.
 */

+@NonNullForAll
 public class KeyInputFilter implements InputFilter {
    private static boolean isAllowed(final char c) {
        return Character.isLetterOrDigit(c) || c == '+' || c == '/';
--- a/ui/src/main/java/com/wireguard/android/widget/MultiselectableRelativeLayout.java
+++ b/ui/src/main/java/com/wireguard/android/widget/MultiselectableRelativeLayout.java
@ -5,12 +5,15 @@

 package com.wireguard.android.widget;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.util.AttributeSet;
 import android.widget.RelativeLayout;

 import com.wireguard.android.R;

+@NonNullForAll
 public class MultiselectableRelativeLayout extends RelativeLayout {
    private static final int[] STATE_MULTISELECTED = {R.attr.state_multiselected};
    private boolean multiselected;
--- a/ui/src/main/java/com/wireguard/android/widget/NameInputFilter.java
+++ b/ui/src/main/java/com/wireguard/android/widget/NameInputFilter.java
@ -5,6 +5,8 @@

 package com.wireguard.android.widget;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;
 import android.text.InputFilter;
 import android.text.SpannableStringBuilder;
@ -16,6 +18,7 @@ import com.wireguard.android.backend.Tunnel;
 * InputFilter for entering WireGuard configuration names (Linux interface names).
 */

+@NonNullForAll
 public class NameInputFilter implements InputFilter {
    private static boolean isAllowed(final char c) {
        return Character.isLetterOrDigit(c) || "_=+.-".indexOf(c) >= 0;
--- a/ui/src/main/java/com/wireguard/android/widget/SlashDrawable.java
+++ b/ui/src/main/java/com/wireguard/android/widget/SlashDrawable.java
@ -6,6 +6,8 @@

 package com.wireguard.android.widget;

+import com.wireguard.util.NonNullForAll;
+
 import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.content.res.ColorStateList;
@ -29,6 +31,7 @@ import androidx.annotation.RequiresApi;
 import android.util.FloatProperty;

@RequiresApi(Build.VERSION_CODES.N)
+@NonNullForAll
 public class SlashDrawable extends Drawable {

    private static final float CENTER_X = 10.65f;
--- a/ui/src/main/java/com/wireguard/android/widget/ToggleSwitch.java
+++ b/ui/src/main/java/com/wireguard/android/widget/ToggleSwitch.java
@ -6,12 +6,15 @@

 package com.wireguard.android.widget;

+import com.wireguard.util.NonNullForAll;
+
 import android.content.Context;
 import android.os.Parcelable;
 import androidx.annotation.Nullable;
 import android.util.AttributeSet;
 import android.widget.Switch;

+@NonNullForAll
 public class ToggleSwitch extends Switch {
    private boolean isRestoringState;
    @Nullable private OnBeforeCheckedChangeListener listener;
--- a/ui/src/main/java/com/wireguard/util/Keyed.java
+++ b/ui/src/main/java/com/wireguard/util/Keyed.java
@ -5,10 +5,13 @@

 package com.wireguard.util;

+import com.wireguard.util.NonNullForAll;
+
 /**
 * Interface for objects that have a identifying key of the given type.
 */

+@NonNullForAll
 public interface Keyed<K> {
    K getKey();
 }
--- a/ui/src/main/java/com/wireguard/util/KeyedList.java
+++ b/ui/src/main/java/com/wireguard/util/KeyedList.java
@ -5,6 +5,8 @@

 package com.wireguard.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import java.util.Collection;
@ -15,6 +17,7 @@ import java.util.List;
 * {@code null} elements.
 */

+@NonNullForAll
 public interface KeyedList<K, E extends Keyed<? extends K>> extends List<E> {
    boolean containsAllKeys(Collection<K> keys);

--- a/ui/src/main/java/com/wireguard/util/SortedKeyedList.java
+++ b/ui/src/main/java/com/wireguard/util/SortedKeyedList.java
@ -5,6 +5,8 @@

 package com.wireguard.util;

+import com.wireguard.util.NonNullForAll;
+
 import androidx.annotation.Nullable;

 import java.util.Collection;
@ -16,6 +18,7 @@ import java.util.Set;
 * applied to their keys.
 */

+@NonNullForAll
 public interface SortedKeyedList<K, E extends Keyed<? extends K>> extends KeyedList<K, E> {
    Comparator<? super K> comparator();