Merge branch 'modernize-pmd-and-randoms' into 'master'

modernize PMD and random fixes

See merge request fdroid/fdroidclient!861

.gitlab-ci.yml

@@ -40,13 +40,13 @@ test_lint_pmd_checkstyle:
     - sed -i -e 's,textReport .*,textReport true,' app/build.gradle
     - ./gradlew testFullDebugUnitTest
     - ./gradlew lint
-    - ./gradlew pmd || export EXITVALUE=1
+    - ./gradlew pmd || (export EXITVALUE=1; echo ERROR !!)
-    - ./gradlew checkstyle || export EXITVALUE=1
+    - ./gradlew checkstyle || (export EXITVALUE=1; echo ERROR !!)
-    - ./tools/check-format-strings.py || export EXITVALUE=1
+    - ./tools/check-format-strings.py || (export EXITVALUE=1; echo ERROR !!)
-    - ./tools/check-fastlane-whitespace.py || export EXITVALUE=1
+    - ./tools/check-fastlane-whitespace.py || (export EXITVALUE=1; echo ERROR !!)
-    - ./tools/remove-unused-and-blank-translations.py || export EXITVALUE=1
+    - ./tools/remove-unused-and-blank-translations.py || (export EXITVALUE=1; echo ERROR !!)
     - echo "These are unused or blank translations that should be removed:"
-    - git --no-pager diff --ignore-all-space --name-only --exit-code app/src/*/res/values*/strings.xml || export EXITVALUE=1
+    - git --no-pager diff --ignore-all-space --name-only --exit-code app/src/*/res/values*/strings.xml || (export EXITVALUE=1; echo ERROR !!)
     - exit $EXITVALUE
 
 errorprone:

app/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 apply plugin: 'checkstyle'
 apply plugin: 'pmd'
 
-/* gets the version name from the latest Git tag, stripping the leading v off */
+/* gets the version name from the latest Git tag */
 def getVersionName = { ->
     def stdout = new ByteArrayOutputStream()
     exec {
@@ -192,7 +192,7 @@ task checkstyle(type: Checkstyle) {
 }
 
 pmd {
-    toolVersion = '5.5.1'
+    toolVersion = '6.20.0'
     consoleOutput = true
 }
 
@@ -202,7 +202,6 @@ task pmdMain(type: Pmd) {
     ruleSets = [] // otherwise defaults clash with the list in rules.xml
     source 'src/main/java'
     include '**/*.java'
-    exclude '**/kellinwood/**/*.java'
 }
 
 task pmdTest(type: Pmd) {

app/src/androidTest/java/org/fdroid/fdroid/Netstat.java

@@ -123,7 +123,7 @@ public class Netstat {
         try {
             BufferedReader in = new BufferedReader(new FileReader("/proc/net/tcp"));
             String line;
-            while ((line = in.readLine()) != null) {
+            while ((line = in.readLine()) != null) { // NOPMD
                 Matcher matcher = NET_PATTERN.matcher(line);
                 if (matcher.find()) {
                     final Connection c = new Connection();
@@ -156,7 +156,7 @@ public class Netstat {
         try {
             BufferedReader in = new BufferedReader(new FileReader("/proc/net/udp"));
             String line;
-            while ((line = in.readLine()) != null) {
+            while ((line = in.readLine()) != null) { // NOPMD
                 Matcher matcher = NET_PATTERN.matcher(line);
                 if (matcher.find()) {
                     final Connection c = new Connection();
@@ -189,7 +189,7 @@ public class Netstat {
         try {
             BufferedReader in = new BufferedReader(new FileReader("/proc/net/raw"));
             String line;
-            while ((line = in.readLine()) != null) {
+            while ((line = in.readLine()) != null) { // NOPMD
                 Matcher matcher = NET_PATTERN.matcher(line);
                 if (matcher.find()) {
                     final Connection c = new Connection();

app/src/main/java/org/fdroid/fdroid/Hasher.java

@@ -68,7 +68,7 @@ public class Hasher {
             InputStream input = null;
             try {
                 input = new BufferedInputStream(new FileInputStream(file));
-                while ((read = input.read(buffer)) > 0) {
+                while ((read = input.read(buffer)) > 0) { // NOPMD Avoid assignments in operands
                     digest.update(buffer, 0, read);
                 }
             } catch (Exception e) {

app/src/main/java/org/fdroid/fdroid/NotificationHelper.java

@@ -199,7 +199,7 @@ class NotificationHelper {
 
         Notification notification;
         if (updates.size() != 1 || useStackedNotifications()) {
-            if (updates.size() == 0) {
+            if (updates.isEmpty()) {
                 // No updates, remove summary
                 notificationManager.cancel(GROUP_UPDATES, NOTIFY_ID_UPDATES);
             } else {
@@ -208,7 +208,7 @@ class NotificationHelper {
             }
         }
         if (installed.size() != 1 || useStackedNotifications()) {
-            if (installed.size() == 0) {
+            if (installed.isEmpty()) {
                 // No installed, remove summary
                 notificationManager.cancel(GROUP_INSTALLED, NOTIFY_ID_INSTALLED);
             } else {

app/src/main/java/org/fdroid/fdroid/Provisioner.java

@@ -64,8 +64,8 @@ public class Provisioner {
             List<ProvisionPlaintext> plaintexts = p.extractProvisionsPlaintext(files);
             List<Provision> provisions = p.parseProvisions(plaintexts);
 
-            if (provisions == null || provisions.size() == 0) {
+            if (provisions == null || provisions.isEmpty()) {
-                Utils.debugLog(TAG, "Provision dir does not contain any provisions: '" + provisionDir.getAbsolutePath() + "' moving on ...");
+                Utils.debugLog(TAG, "Provision dir is empty: '" + provisionDir.getAbsolutePath() + "' moving on ...");
             } else {
                 int cleanupCounter = 0;
                 for (Provision provision : provisions) {
@@ -173,7 +173,7 @@ public class Provisioner {
                 try {
                     in = new ZipInputStream(new FileInputStream(file));
                     ZipEntry zipEntry;
-                    while ((zipEntry = in.getNextEntry()) != null) {
+                    while ((zipEntry = in.getNextEntry()) != null) { // NOPMD Avoid assignments in operands
                         String name = zipEntry.getName();
                         if ("repo_provision.json".equals(name)) {
                             if (plain.getRepositoryProvision() != null) {

app/src/main/java/org/fdroid/fdroid/Utils.java

@@ -524,7 +524,7 @@ public final class Utils {
 
             byte[] dataBytes = new byte[8192];
             int nread;
-            while ((nread = bis.read(dataBytes)) != -1) {
+            while ((nread = bis.read(dataBytes)) != -1) { // NOPMD Avoid assignments in operands
                 md.update(dataBytes, 0, nread);
             }
 

app/src/main/java/org/fdroid/fdroid/data/AppProvider.java

@@ -638,7 +638,7 @@ public class AppProvider extends FDroidProvider {
         // Put in a Set to remove duplicates
         final Set<String> keywordSet = new HashSet<>(Arrays.asList(query.split("\\s")));
 
-        if (keywordSet.size() == 0) {
+        if (keywordSet.isEmpty()) {
             return new AppQuerySelection();
         }
 

app/src/main/java/org/fdroid/fdroid/data/FDroidProvider.java

@@ -27,7 +27,7 @@ public abstract class FDroidProvider extends ContentProvider {
     static final int CODE_LIST = 1;
     static final int CODE_SINGLE = 2;
 
-    private boolean isApplyingBatch;
+    private boolean applyingBatch;
 
     protected abstract String getTableName();
 
@@ -47,7 +47,7 @@ public abstract class FDroidProvider extends ContentProvider {
      * Based on http://stackoverflow.com/a/15886915.
      */
     protected final boolean isApplyingBatch() {
-        return this.isApplyingBatch;
+        return this.applyingBatch;
     }
 
     @NonNull
@@ -55,7 +55,7 @@ public abstract class FDroidProvider extends ContentProvider {
     public ContentProviderResult[] applyBatch(@NonNull ArrayList<ContentProviderOperation> operations)
             throws OperationApplicationException {
         ContentProviderResult[] result = null;
-        isApplyingBatch = true;
+        applyingBatch = true;
         final SQLiteDatabase db = db();
         db.beginTransaction();
         try {
@@ -63,7 +63,7 @@ public abstract class FDroidProvider extends ContentProvider {
             db.setTransactionSuccessful();
         } finally {
             db.endTransaction();
-            isApplyingBatch = false;
+            applyingBatch = false;
         }
         return result;
     }

app/src/main/java/org/fdroid/fdroid/data/QueryBuilder.java

@@ -143,7 +143,7 @@ abstract class QueryBuilder {
     }
 
     private String orderBySql() {
-        if (orderBys.size() == 0) {
+        if (orderBys.isEmpty()) {
             return "";
         }
         return " ORDER BY " + TextUtils.join(", ", orderBys);

app/src/main/java/org/fdroid/fdroid/data/RepoPersister.java

@@ -182,12 +182,12 @@ public class RepoPersister {
     private void calcApkCompatibilityFlags(List<Apk> apks) {
         for (final Apk apk : apks) {
             final List<String> reasons = checker.getIncompatibleReasons(apk);
-            if (reasons.size() > 0) {
+            if (reasons.isEmpty()) {
-                apk.compatible = false;
-                apk.incompatibleReasons = reasons.toArray(new String[reasons.size()]);
-            } else {
                 apk.compatible = true;
                 apk.incompatibleReasons = null;
+            } else {
+                apk.compatible = false;
+                apk.incompatibleReasons = reasons.toArray(new String[reasons.size()]);
             }
         }
     }

app/src/main/java/org/fdroid/fdroid/data/RepoProvider.java

@@ -80,7 +80,7 @@ public class RepoProvider extends FDroidProvider {
 
             boolean haveTriedWithoutPath = false;
             while (repo == null && !haveTriedWithoutPath) {
-                if (pathSegments.size() == 0) {
+                if (pathSegments.isEmpty()) {
                     haveTriedWithoutPath = true;
                 } else {
                     pathSegments.remove(pathSegments.size() - 1);
@@ -99,7 +99,11 @@ public class RepoProvider extends FDroidProvider {
                                          String address, String[] projection) {
             List<Repo> repos = findBy(
                     context, Cols.ADDRESS, address, projection);
-            return repos.size() > 0 ? repos.get(0) : null;
+            if (repos.isEmpty()) {
+                return null;
+            } else {
+                return repos.get(0);
+            }
         }
 
         public static List<Repo> all(Context context) {

app/src/main/java/org/fdroid/fdroid/views/AppDetailsRecyclerViewAdapter.java

@@ -153,13 +153,13 @@ public class AppDetailsRecyclerViewAdapter
         addItem(VIEWTYPE_DONATE);
         addItem(VIEWTYPE_LINKS);
         addItem(VIEWTYPE_PERMISSIONS);
-        if (versions.size() > 0) {
+        if (versions.isEmpty()) {
+            addItem(VIEWTYPE_NO_VERSIONS);
+        } else {
             addItem(VIEWTYPE_VERSIONS);
             if (showVersions) {
                 setShowVersions(true);
             }
-        } else {
-            addItem(VIEWTYPE_NO_VERSIONS);
         }
 
         notifyDataSetChanged();
@@ -563,7 +563,7 @@ public class AppDetailsRecyclerViewAdapter
 
             updateAntiFeaturesWarning();
             buttonPrimaryView.setText(R.string.menu_install);
-            buttonPrimaryView.setVisibility(versions.size() > 0 ? View.VISIBLE : View.GONE);
+            buttonPrimaryView.setVisibility(versions.isEmpty() ? View.GONE : View.VISIBLE);
             buttonSecondaryView.setText(R.string.menu_uninstall);
             buttonSecondaryView.setVisibility(app.isUninstallable(context) ? View.VISIBLE : View.INVISIBLE);
             buttonSecondaryView.setOnClickListener(new View.OnClickListener() {

app/src/main/java/org/fdroid/fdroid/views/apps/AppListItemState.java

@@ -21,7 +21,7 @@ public class AppListItemState {
     private int progressMax = -1;
     private boolean showInstallButton;
     private boolean showCheckBox;
-    private boolean isCheckBoxChecked;
+    private boolean checkBoxChecked;
 
     public AppListItemState(@NonNull App app) {
         this.app = app;
@@ -124,7 +124,7 @@ public class AppListItemState {
     }
 
     public boolean isCheckBoxChecked() {
-        return isCheckBoxChecked;
+        return checkBoxChecked;
     }
 
     /**
@@ -133,7 +133,7 @@ public class AppListItemState {
      */
     public AppListItemState setCheckBoxStatus(boolean checked) {
         this.showCheckBox = true;
-        this.isCheckBoxChecked = checked;
+        this.checkBoxChecked = checked;
         return this;
     }
 

app/src/main/java/org/fdroid/fdroid/views/updates/items/AppUpdateData.java

@@ -9,7 +9,7 @@ import android.app.Activity;
  * org.fdroid.fdroid.views.updates.UpdatesAdapter#delegatesManager}
  * to specify a data type more specific than just {@link Object}.
  */
-public abstract class AppUpdateData {
+public abstract class AppUpdateData { // NOPMD This abstract class does not have any abstract methods
     public final Activity activity;
 
     public AppUpdateData(Activity activity) {

app/src/test/java/org/fdroid/fdroid/data/FDroidProviderTest.java

@@ -9,7 +9,7 @@ import org.robolectric.RuntimeEnvironment;
 import org.robolectric.Shadows;
 import org.robolectric.shadows.ShadowContentResolver;
 
-public abstract class FDroidProviderTest {
+public abstract class FDroidProviderTest { // NOPMD This abstract class does not have any abstract methods
 
     protected ShadowContentResolver contentResolver;
     protected ContextWrapper context;

app/src/test/java/org/fdroid/fdroid/data/RepoXMLHandlerTest.java

@@ -840,7 +840,7 @@ public class RepoXMLHandlerTest {
         for (App app : apps) {
             if (expectedAntiFeatures.containsKey(app.packageName)) {
                 List<String> antiFeatures = expectedAntiFeatures.get(app.packageName);
-                if (antiFeatures.size() == 0) {
+                if (antiFeatures.isEmpty()) {
                     assertNull(app.antiFeatures);
                 } else {
                     List<String> actualAntiFeatures = new ArrayList<>();

app/src/test/java/org/fdroid/fdroid/updater/IndexV1UpdaterTest.java

@@ -423,7 +423,7 @@ public class IndexV1UpdaterTest extends FDroidProviderTest {
         for (String field : allowed) {
             fields.remove(field);
         }
-        if (fields.size() > 0) {
+        if (!fields.isEmpty()) {
             String sb = String.valueOf(instance.getClass()) + " has fields not setup for Jackson: " +
                     TextUtils.join(", ", fields) + "\nRead class javadoc for more info.";
             fail(sb);

app/src/test/java/org/fdroid/fdroid/updater/Issue763MultiRepo.java

@@ -35,7 +35,7 @@ public class Issue763MultiRepo extends MultiIndexUpdaterTest {
     }
 
     @Test
-    public void antoxRepo() throws IndexUpdater.UpdateException {
+    public void testAntoxRepo() throws IndexUpdater.UpdateException {
         assertAntoxEmpty();
         setEnabled(microGRepo, true);
         updateAntox();
@@ -47,7 +47,7 @@ public class Issue763MultiRepo extends MultiIndexUpdaterTest {
     }
 
     @Test
-    public void microGRepo() throws IndexUpdater.UpdateException {
+    public void testMicroGRepo() throws IndexUpdater.UpdateException {
         assertMicroGEmpty();
         setEnabled(microGRepo, true);
         updateMicroG();

build.gradle

@@ -1,15 +1,17 @@
 buildscript {
     repositories {
+        mavenCentral()
         maven { url 'https://maven.google.com/' } // :-| must be before jcenter()
-        jcenter()
+        jcenter() // download from jCenter as last resort https://blog.autsoft.hu/a-confusing-dependency
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.1'
+        classpath 'com.android.tools.build:gradle:3.1.4'
     }
 }
 allprojects {
     repositories {
+        mavenCentral()
         maven { url 'https://maven.google.com/' } // :-| must be before jcenter()
-        jcenter()
+        jcenter() // download from jCenter as last resort https://blog.autsoft.hu/a-confusing-dependency
     }
 }

config/pmd/rules-main.xml

@@ -1,9 +1,13 @@
 <?xml version="1.0"?>
 <ruleset name="Custom ruleset (for main code)"
-        xmlns="http://pmd.sf.net/ruleset/1.0.0"
+         xmlns="http://pmd.sf.net/ruleset/1.0.0"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
-        xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>
+    Rules for the project code aka "main".
+  </description>
+
+  <!-- TODO <rule ref="category/java/errorprone.xml/CloseResource"/> -->
 
-    <rule ref="rulesets/java/imports.xml" />
 </ruleset>

config/pmd/rules-test.xml

@@ -1,11 +1,17 @@
 <?xml version="1.0"?>
 <ruleset name="Custom ruleset (for tests)"
-        xmlns="http://pmd.sf.net/ruleset/1.0.0"
+         xmlns="http://pmd.sf.net/ruleset/1.0.0"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
-        xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>
+    Rules for the test harness code aka "androidTest" and "test".
+  </description>
+
+  <!-- ideally these would be promoted to rules.xml -->
+  <rule ref="category/java/bestpractices.xml/ConstantsInInterface"/>
+  <rule ref="category/java/bestpractices.xml/UseCollectionIsEmpty"/>
+  <rule ref="category/java/errorprone.xml/AvoidFieldNameMatchingMethodName"/>
+  <rule ref="category/java/errorprone.xml/AvoidFieldNameMatchingTypeName"/>
 
-    <rule ref="rulesets/java/imports.xml">
-        <exclude name="TooManyStaticImports" /><!-- Static imports are commonly used for JUnit tests -->
-    </rule>
 </ruleset>

config/pmd/rules.xml

@@ -1,52 +1,52 @@
 <?xml version="1.0"?>
 <ruleset name="Custom ruleset"
-        xmlns="http://pmd.sf.net/ruleset/1.0.0"
+         xmlns="http://pmd.sf.net/ruleset/1.0.0"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
-        xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>
+    Rules for the whole project
+  </description>
 
-    <rule ref="rulesets/java/basic.xml">
+  <rule ref="category/java/bestpractices.xml/AbstractClassWithoutAbstractMethod"/>
-        <exclude name="CollapsibleIfStatements"/> <!--sometimes forces hard to read code-->
+  <rule ref="category/java/bestpractices.xml/AvoidReassigningLoopVariables"/>
-    </rule>
+  <rule ref="category/java/bestpractices.xml/DefaultLabelNotLastInSwitchStmt"/>
-    <rule ref="rulesets/java/unusedcode.xml"/>
+  <rule ref="category/java/bestpractices.xml/MissingOverride"/>
-    <rule ref="rulesets/java/android.xml"/>
+  <rule ref="category/java/bestpractices.xml/UnusedFormalParameter"/>
-    <rule ref="rulesets/java/clone.xml"/>
+  <rule ref="category/java/bestpractices.xml/UnusedLocalVariable"/>
-    <rule ref="rulesets/java/finalizers.xml"/>
+  <rule ref="category/java/bestpractices.xml/UnusedPrivateField"/>
-    <rule ref="rulesets/java/migrating.xml"/>
+  <rule ref="category/java/bestpractices.xml/UnusedPrivateMethod"/>
-    <rule ref="rulesets/java/unnecessary.xml">
+  <rule ref="category/java/codestyle.xml/UnnecessaryConstructor"/>
-        <exclude name="UselessParentheses"/> <!--Too nitpicky-->
+  <rule ref="category/java/codestyle.xml/UnnecessaryLocalBeforeReturn"/>
-    </rule>
+  <rule ref="category/java/design.xml/AvoidRethrowingException"/>
-    <rule ref="rulesets/java/empty.xml">
+  <rule ref="category/java/design.xml/AvoidThrowingNewInstanceOfSameException"/>
-        <exclude name="EmptyCatchBlock"/> <!--Ignoring an exception-->
+  <rule ref="category/java/design.xml/AvoidThrowingNullPointerException"/>
-        <exclude name="EmptyWhileStmt"/> <!--Can be useful sometimes-->
+  <rule ref="category/java/design.xml/DoNotExtendJavaLangError"/>
-    </rule>
+  <rule ref="category/java/design.xml/FinalFieldCouldBeStatic"/>
-    <rule ref="rulesets/java/optimizations.xml/PrematureDeclaration"/>
+  <rule ref="category/java/design.xml/ImmutableField"/>
-    <rule ref="rulesets/java/optimizations.xml/AddEmptyString"/>
+  <rule ref="category/java/design.xml/LogicInversion"/>
-    <rule ref="rulesets/java/optimizations.xml/UseArraysAsList"/>
+  <rule ref="category/java/design.xml/SimplifyBooleanExpressions"/>
-    <rule ref="rulesets/java/optimizations.xml/UnnecessaryWrapperObjectCreation"/>
+  <rule ref="category/java/design.xml/SimplifyBooleanReturns"/>
-
+  <rule ref="category/java/design.xml/SingularField"/>
-    <rule ref="rulesets/java/controversial.xml/UnnecessaryConstructor"/>
+  <rule ref="category/java/errorprone.xml/AssignmentInOperand"/>
-    <rule ref="rulesets/java/controversial.xml/UnnecessaryParentheses"/>
+  <rule ref="category/java/errorprone.xml/AvoidAssertAsIdentifier"/>
-
+  <rule ref="category/java/errorprone.xml/AvoidBranchingStatementAsLastInLoop"/>
-    <rule ref="rulesets/java/strictexception.xml/AvoidRethrowingException"/>
+  <rule ref="category/java/errorprone.xml/AvoidCallingFinalize"/>
-    <rule ref="rulesets/java/strictexception.xml/AvoidCatchingThrowable"/>
+  <rule ref="category/java/errorprone.xml/AvoidCatchingNPE"/>
-    <rule ref="rulesets/java/strictexception.xml/AvoidCatchingNPE"/>
+  <rule ref="category/java/errorprone.xml/AvoidCatchingThrowable"/>
-    <rule ref="rulesets/java/strictexception.xml/DoNotExtendJavaLangError"/>
+  <rule ref="category/java/errorprone.xml/AvoidMultipleUnaryOperators"/>
-    <rule ref="rulesets/java/strictexception.xml/DoNotThrowExceptionInFinally"/>
+  <rule ref="category/java/errorprone.xml/AvoidUsingOctalValues"/>
-    <rule ref="rulesets/java/strictexception.xml/AvoidThrowingNewInstanceOfSameException"/>
+  <rule ref="category/java/errorprone.xml/BrokenNullCheck"/>
-    <rule ref="rulesets/java/strictexception.xml/AvoidThrowingNullPointerException"/>
+  <rule ref="category/java/errorprone.xml/CallSuperFirst"/>
-
+  <rule ref="category/java/errorprone.xml/CallSuperLast"/>
-    <rule ref="rulesets/java/design.xml/FinalFieldCouldBeStatic"/>
+  <rule ref="category/java/errorprone.xml/DoNotHardCodeSDCard" />
-    <rule ref="rulesets/java/design.xml/CloseResource"/>
+  <rule ref="category/java/errorprone.xml/DoNotThrowExceptionInFinally"/>
-    <rule ref="rulesets/java/design.xml/DefaultLabelNotLastInSwitchStmt"/>
+  <rule ref="category/java/errorprone.xml/EqualsNull"/>
-    <rule ref="rulesets/java/design.xml/UnnecessaryLocalBeforeReturn"/>
+  <rule ref="category/java/errorprone.xml/IdempotentOperations"/>
-    <rule ref="rulesets/java/design.xml/NonCaseLabelInSwitchStatement"/>
+  <rule ref="category/java/errorprone.xml/NonCaseLabelInSwitchStatement"/>
-    <rule ref="rulesets/java/design.xml/EqualsNull"/>
+  <rule ref="category/java/performance.xml/AddEmptyString"/>
-    <rule ref="rulesets/java/design.xml/IdempotentOperations"/>
+  <rule ref="category/java/performance.xml/UnnecessaryWrapperObjectCreation"/>
-    <rule ref="rulesets/java/design.xml/ImmutableField"/>
+  <rule ref="category/java/performance.xml/UseArraysAsList"/>
-    <rule ref="rulesets/java/design.xml/SingularField"/>
+  <rule ref="category/java/security.xml"/>
-    <rule ref="rulesets/java/design.xml/SimplifyBooleanReturns"/>
-    <rule ref="rulesets/java/design.xml/SimplifyBooleanExpressions"/>
-    <rule ref="rulesets/java/design.xml/LogicInversion"/>
 
 </ruleset>