Add JSR305 annotation to LeakGuardHandlerWrapper

Change-Id: I7456200af739db4510c5549b7bc894fb48749455

3 files changed, 12 insertions, 7 deletions

diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 77016cb8b..b989cf266 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -110,6 +110,8 @@ import java.util.List;
 import java.util.Locale;
 import java.util.concurrent.TimeUnit;
 
+import javax.annotation.Nonnull;
+
 /**
  * Input method implementation for Qwerty'ish keyboard.
  */
@@ -208,7 +210,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         private int mDelayInMillisecondsToUpdateSuggestions;
         private int mDelayInMillisecondsToUpdateShiftState;
 
-        public UIHandler(final LatinIME ownerInstance) {
+        public UIHandler(@Nonnull final LatinIME ownerInstance) {
             super(ownerInstance);
         }
 
diff --git a/java/src/com/android/inputmethod/latin/setup/SetupWizardActivity.java b/java/src/com/android/inputmethod/latin/setup/SetupWizardActivity.java
index 54562f39d..c3b30dcb4 100644
--- a/java/src/com/android/inputmethod/latin/setup/SetupWizardActivity.java
+++ b/java/src/com/android/inputmethod/latin/setup/SetupWizardActivity.java
@@ -42,6 +42,8 @@ import com.android.inputmethod.latin.utils.UncachedInputMethodManagerUtils;
 
 import java.util.ArrayList;
 
+import javax.annotation.Nonnull;
+
 // TODO: Use Fragment to implement welcome screen and setup steps.
 public final class SetupWizardActivity extends Activity implements View.OnClickListener {
     static final String TAG = SetupWizardActivity.class.getSimpleName();
@@ -82,7 +84,7 @@ public final class SetupWizardActivity extends Activity implements View.OnClickL
 
         private final InputMethodManager mImmInHandler;
 
-        public SettingsPoolingHandler(final SetupWizardActivity ownerInstance,
+        public SettingsPoolingHandler(@Nonnull final SetupWizardActivity ownerInstance,
                 final InputMethodManager imm) {
             super(ownerInstance);
             mImmInHandler = imm;
diff --git a/java/src/com/android/inputmethod/latin/utils/LeakGuardHandlerWrapper.java b/java/src/com/android/inputmethod/latin/utils/LeakGuardHandlerWrapper.java
index dd6fac671..9a5be99b3 100644
--- a/java/src/com/android/inputmethod/latin/utils/LeakGuardHandlerWrapper.java
+++ b/java/src/com/android/inputmethod/latin/utils/LeakGuardHandlerWrapper.java
@@ -21,21 +21,22 @@ import android.os.Looper;
 
 import java.lang.ref.WeakReference;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
 public class LeakGuardHandlerWrapper<T> extends Handler {
     private final WeakReference<T> mOwnerInstanceRef;
 
-    public LeakGuardHandlerWrapper(final T ownerInstance) {
+    public LeakGuardHandlerWrapper(@Nonnull final T ownerInstance) {
         this(ownerInstance, Looper.myLooper());
     }
 
-    public LeakGuardHandlerWrapper(final T ownerInstance, final Looper looper) {
+    public LeakGuardHandlerWrapper(@Nonnull final T ownerInstance, final Looper looper) {
         super(looper);
-        if (ownerInstance == null) {
-            throw new NullPointerException("ownerInstance is null");
-        }
         mOwnerInstanceRef = new WeakReference<>(ownerInstance);
     }
 
+    @Nullable
     public T getOwnerInstance() {
         return mOwnerInstanceRef.get();
     }