update gradle, Observable source emits error when there is no data found in the repository

Author: anasanasanas1

.idea/gradle.xml

@@ -8,12 +8,12 @@
 import android.view.View;
 import android.widget.ProgressBar;
 
-
 import com.anax.preference.Model.Country;
 import com.anax.preference.Preference.CountryPreferenceRepo;
 import com.anax.preference.Remote.ApiInterface;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -67,7 +67,12 @@ protected void onCreate(Bundle savedInstanceState) {
     public void getCountriesCodeWithRx() {
         progressBar.setVisibility(View.VISIBLE);
 
-        countryPreferenceRepo.getListObservable()
+        countryPreferenceRepo.getListObservable().onErrorReturn(new Function<Throwable, List<Country>>() {
+            @Override
+            public List<Country> apply(Throwable throwable) throws Exception {
+                return Collections.emptyList();
+            }
+        })
                 .mergeWith(ApiInterface.Creator.newApiService().getCountryCodeObservable()
                         .map(new Function<List<Country>, List<Country>>() {
                             @Override
@@ -90,7 +95,8 @@ public void onNext(List<Country> countriesList) {
 
                     @Override
                     public void onError(Throwable e) {
-
+                        Log.d(LOG, "onError");
+                        Log.d(LOG, e.getMessage());
                     }
 
                     @Override

.idea/misc.xml

@@ -6,7 +6,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:2.3.0'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

.idea/modules.xml

@@ -1,6 +1,6 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Fri Mar 10 13:43:22 EET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip

app/src/main/java/com/anax/preference/MainActivity.java

@@ -2,6 +2,8 @@
 
 import android.content.Context;
 
+import com.anax.preferencerhythm.exception.SharedPrefDataNotFoundException;
+
 import java.util.List;
 
 import io.reactivex.Observable;
@@ -49,7 +51,7 @@ public final List<T> getList() {
     @Override
     public final Observable<List<T>> getListObservable() {
         if (preferences.getList(listKey, clazz) == null)
-            return Observable.empty();
+            return Observable.error(new SharedPrefDataNotFoundException());
         return Observable.just(preferences.getList(listKey, clazz));
     }
 
@@ -66,7 +68,7 @@ public final T getObject() {
     @Override
     public final Observable<T> getObjectObservable() {
         if (preferences.getSingleObject(objectKey, clazz) == null)
-            return Observable.empty();
+            return Observable.error(new SharedPrefDataNotFoundException());
 
         return Observable.just(preferences.getSingleObject(objectKey, clazz));
     }

build.gradle

@@ -12,7 +12,7 @@
  * @since 27/01/2017
  */
 class Preferences {
-    private final String KEY_CHEKER = "TEST_ENCRYPTION_KEY";
+    private final String KEY_CHECKER = "TEST_ENCRYPTION_KEY";
 
     private SharedPreferences mPref;
     private Serializer serializer;
@@ -119,19 +119,19 @@ <T> List<T> getList(String name, Class<T> clazz) {
         }
     }
 
-    public boolean isEmpty() {
+    boolean isEmpty() {
         return mPref.getAll().size() == 0;
     }
 
     private void saveEncryptionKeyTester() {
-        saveSingleObject(KEY_CHEKER, KEY_CHEKER);
+        saveSingleObject(KEY_CHECKER, KEY_CHECKER);
     }
 
     private String getEncryptionKeyTester() {
-        return getSingleObject(KEY_CHEKER, String.class);
+        return getSingleObject(KEY_CHECKER, String.class);
     }
 
     private boolean isEncryptionKeyChanged() {
-        return !getEncryptionKeyTester().equals(KEY_CHEKER);
+        return !getEncryptionKeyTester().equals(KEY_CHECKER);
     }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,23 @@
+package com.anax.preferencerhythm.exception;
+
+/**
+ * Created by Anas AlaaEldin on 3/10/2017.
+ */
+
+public class SharedPrefDataNotFoundException extends Exception {
+
+    public SharedPrefDataNotFoundException() {
+    }
+
+    public SharedPrefDataNotFoundException(String message) {
+        super(message);
+    }
+
+    public SharedPrefDataNotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public SharedPrefDataNotFoundException(Throwable cause) {
+        super(cause);
+    }
+}