fix sonarQube code smells

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/CNNArch2Gluon.java

@@ -51,18 +51,18 @@ public class CNNArch2Gluon implements CNNArchGenerator {
     private boolean isSupportedLayer(ArchitectureElementSymbol element, LayerSupportChecker layerChecker){
         List<ArchitectureElementSymbol> constructLayerElemList;
 
-        if (!(element instanceof IOSymbol) && (element.getResolvedThis().get() instanceof CompositeElementSymbol))
-        {
+        if (!(element instanceof IOSymbol) && (element.getResolvedThis().get() instanceof CompositeElementSymbol)) {
             constructLayerElemList = ((CompositeElementSymbol)element.getResolvedThis().get()).getElements();
             for (ArchitectureElementSymbol constructedLayerElement : constructLayerElemList) {
-                if (!isSupportedLayer(constructedLayerElement, layerChecker)) return false;
+                if (!isSupportedLayer(constructedLayerElement, layerChecker)) {
+                    return false;
+                }
             }
         }
         if (!layerChecker.isSupported(element.toString())) {
             Log.error("Unsupported layer " + "'" + element.getName() + "'" + " for the backend MXNET.");
             return false;
-        }
-        else {
+        } else {
             return true;
         }
     }
@@ -70,11 +70,18 @@ public class CNNArch2Gluon implements CNNArchGenerator {
     private boolean supportCheck(ArchitectureSymbol architecture){
         LayerSupportChecker layerChecker = new LayerSupportChecker();
         for (ArchitectureElementSymbol element : ((CompositeElementSymbol)architecture.getBody()).getElements()){
-            if(!isSupportedLayer(element, layerChecker)) return false;
+            if(!isSupportedLayer(element, layerChecker)) {
+                return false;
+            }
         }
         return true;
     }
 
+    private static void quitGeneration(){
+        Log.error("Code generation is aborted");
+        System.exit(1);
+    }
+
     public CNNArch2Gluon() {
         setGenerationTargetPath("./target/generated-sources-cnnarch/");
     }
@@ -105,19 +112,17 @@ public class CNNArch2Gluon implements CNNArchGenerator {
         Optional<CNNArchCompilationUnitSymbol> compilationUnit = scope.resolve(rootModelName, CNNArchCompilationUnitSymbol.KIND);
         if (!compilationUnit.isPresent()){
             Log.error("could not resolve architecture " + rootModelName);
-            System.exit(1);
+            quitGeneration();
         }
 
         CNNArchCocos.checkAll(compilationUnit.get());
         if (!supportCheck(compilationUnit.get().getArchitecture())){
-            Log.error("Code generation aborted.");
-            System.exit(1);
+            quitGeneration();
         }
 
         try{
             generateFiles(compilationUnit.get().getArchitecture());
-        }
-        catch (IOException e){
+        } catch (IOException e){
             Log.error(e.toString());
         }
     }
@@ -178,7 +183,7 @@ public class CNNArch2Gluon implements CNNArchGenerator {
         try {
             generateFromFilecontentsMap(fileContentMap);
         } catch (IOException e) {
-            e.printStackTrace();
+            Log.error("CMake file could not be generated" + e.getMessage());
         }
     }
 

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/CNNArch2GluonCli.java

@@ -19,6 +19,7 @@
  * *******************************************************************************
  */
 package de.monticore.lang.monticar.cnnarch.gluongenerator;
+import de.se_rwth.commons.logging.Log;
 
 import org.apache.commons.cli.*;
 
@@ -73,13 +74,18 @@ public class CNNArch2GluonCli {
         try {
             cliArgs = parser.parse(options, args);
         } catch (ParseException e) {
-            System.err.println("argument parsing exception: " + e.getMessage());
-            System.exit(1);
+            Log.error("argument parsing exception: " + e.getMessage());
+            quitGeneration();
             return null;
         }
         return cliArgs;
     }
 
+    private static void quitGeneration(){
+        Log.error("Code generation is aborted");
+        System.exit(1);
+    }
+
     private static void runGenerator(CommandLine cliArgs) {
         Path modelsDirPath = Paths.get(cliArgs.getOptionValue(OPTION_MODELS_PATH.getOpt()));
         String rootModelName = cliArgs.getOptionValue(OPTION_ROOT_MODEL.getOpt());

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/CNNArchTemplateController.java

@@ -92,8 +92,7 @@ public class CNNArchTemplateController {
 
         if (isSoftmaxOutput(layer) || isLogisticRegressionOutput(layer)){
             inputNames = getLayerInputs(layer.getInputElement().get());
-        }
-        else {
+        } else {
             for (ArchitectureElementSymbol input : layer.getPrevious()) {
                 if (input.getOutputTypes().size() == 1) {
                     inputNames.add(getName(input));
@@ -148,12 +147,10 @@ public class CNNArchTemplateController {
         if (ioElement.isAtomic()){
             if (ioElement.isInput()){
                 include(TEMPLATE_ELEMENTS_DIR_PATH, "Input", writer, netDefinitionMode);
-            }
-            else {
+            } else {
                 include(TEMPLATE_ELEMENTS_DIR_PATH, "Output", writer, netDefinitionMode);
             }
-        }
-        else {
+        } else {
             include(ioElement.getResolvedThis().get(), writer, netDefinitionMode);
         }
 
@@ -170,8 +167,7 @@ public class CNNArchTemplateController {
                 String templateName = layer.getDeclaration().getName();
                 include(TEMPLATE_ELEMENTS_DIR_PATH, templateName, writer, netDefinitionMode);
             }
-        }
-        else {
+        } else {
             include(layer.getResolvedThis().get(), writer, netDefinitionMode);
         }
 
@@ -192,11 +188,9 @@ public class CNNArchTemplateController {
     public void include(ArchitectureElementSymbol architectureElement, Writer writer, NetDefinitionMode netDefinitionMode){
         if (architectureElement instanceof CompositeElementSymbol){
             include((CompositeElementSymbol) architectureElement, writer, netDefinitionMode);
-        }
-        else if (architectureElement instanceof LayerSymbol){
+        } else if (architectureElement instanceof LayerSymbol){
             include((LayerSymbol) architectureElement, writer, netDefinitionMode);
-        }
-        else {
+        } else {
             include((IOSymbol) architectureElement, writer, netDefinitionMode);
         }
     }
@@ -213,15 +207,15 @@ public class CNNArchTemplateController {
     }
 
     public Map.Entry<String,String> process(String templateNameWithoutEnding, Target targetLanguage){
-        StringWriter writer = new StringWriter();
+        StringWriter newWriter = new StringWriter();
         this.mainTemplateNameWithoutEnding = templateNameWithoutEnding;
         this.targetLanguage = targetLanguage;
-        this.writer = writer;
+        this.writer = newWriter;
 
-        include("", templateNameWithoutEnding, writer);
+        include("", templateNameWithoutEnding, newWriter);
         String fileEnding = targetLanguage.toString();
         String fileName = getFileNameWithoutEnding() + fileEnding;
-        Map.Entry<String,String> fileContent = new AbstractMap.SimpleEntry<>(fileName, writer.toString());
+        Map.Entry<String,String> fileContent = new AbstractMap.SimpleEntry<>(fileName, newWriter.toString());
 
         this.mainTemplateNameWithoutEnding = null;
         this.targetLanguage = null;
@@ -265,12 +259,12 @@ public class CNNArchTemplateController {
     }
 
     private boolean isTOutput(Class inputPredefinedLayerClass, ArchitectureElementSymbol architectureElement){
-        if (architectureElement.isOutput()){
-            if (architectureElement.getInputElement().isPresent() && architectureElement.getInputElement().get() instanceof LayerSymbol){
-                LayerSymbol inputLayer = (LayerSymbol) architectureElement.getInputElement().get();
-                if (inputPredefinedLayerClass.isInstance(inputLayer.getDeclaration())){
-                    return true;
-                }
+        if (architectureElement.isOutput()
+                && architectureElement.getInputElement().isPresent()
+                && architectureElement.getInputElement().get() instanceof LayerSymbol){
+            LayerSymbol inputLayer = (LayerSymbol) architectureElement.getInputElement().get();
+            if (inputPredefinedLayerClass.isInstance(inputLayer.getDeclaration())){
+                return true;
             }
         }
         return false;

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/CNNTrain2Gluon.java

@@ -37,7 +37,9 @@ public class CNNTrain2Gluon implements CNNTrainGenerator {
         it = configuration.getEntryMap().keySet().iterator();
         while (it.hasNext()) {
             String key = it.next().toString();
-            if (funcChecker.getUnsupportedElemList().contains(key)) it.remove();
+            if (funcChecker.getUnsupportedElemList().contains(key)) {
+                it.remove();
+            }
         }
     }
 
@@ -52,12 +54,19 @@ public class CNNTrain2Gluon implements CNNTrainGenerator {
                 Iterator it = configuration.getOptimizer().getOptimizerParamMap().keySet().iterator();
                 while (it.hasNext()) {
                     String key = it.next().toString();
-                    if (funcChecker.getUnsupportedElemList().contains(key)) it.remove();
+                    if (funcChecker.getUnsupportedElemList().contains(key)) {
+                        it.remove();
+                    }
                 }
             }
         }
     }
 
+    private static void quitGeneration(){
+        Log.error("Code generation is aborted");
+        System.exit(1);
+    }
+
     public CNNTrain2Gluon() {
         setGenerationTargetPath("./target/generated-sources-cnnarch/");
     }
@@ -89,7 +98,7 @@ public class CNNTrain2Gluon implements CNNTrainGenerator {
         Optional<CNNTrainCompilationUnitSymbol> compilationUnit = scope.resolve(rootModelName, CNNTrainCompilationUnitSymbol.KIND);
         if (!compilationUnit.isPresent()) {
             Log.error("could not resolve training configuration " + rootModelName);
-            System.exit(1);
+            quitGeneration();
         }
         setInstanceName(compilationUnit.get().getFullName());
         CNNTrainCocos.checkAll(compilationUnit.get());
@@ -107,7 +116,7 @@ public class CNNTrain2Gluon implements CNNTrainGenerator {
                 genCPP.generateFile(new FileContent(fileContents.get(fileName), fileName));
             }
         } catch (IOException e) {
-            e.printStackTrace();
+            Log.error("CNNTrainer file could not be generated" + e.getMessage());
         }
     }
 

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/ConfigurationData.java

@@ -89,8 +89,7 @@ public class ConfigurationData {
             Class realClass = entry.getValue().getValue().getValue().getClass();
             if (realClass == Boolean.class) {
                 valueAsString = (Boolean) entry.getValue().getValue().getValue() ? "True" : "False";
-            }
-            else if (lrPolicyClasses.contains(realClass)) {
+            } else if (lrPolicyClasses.contains(realClass)) {
                 valueAsString = "'" + valueAsString + "'";
             }
             mapToStrings.put(paramName, valueAsString);

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/LayerNameCreator.java

@@ -47,17 +47,14 @@ public class LayerNameCreator {
     protected int name(ArchitectureElementSymbol architectureElement, int stage, List<Integer> streamIndices){
         if (architectureElement instanceof CompositeElementSymbol){
             return nameComposite((CompositeElementSymbol) architectureElement, stage, streamIndices);
-        }
-        else{
+        } else{
             if (architectureElement.isAtomic()){
                 if (architectureElement.getMaxSerialLength().get() > 0){
                     return add(architectureElement, stage, streamIndices);
-                }
-                else {
+                } else {
                     return stage;
                 }
-            }
-            else {
+            } else {
                 ArchitectureElementSymbol resolvedElement = architectureElement.getResolvedThis().get();
                 return name(resolvedElement, stage, streamIndices);
             }
@@ -78,8 +75,7 @@ public class LayerNameCreator {
 
             streamIndices.remove(lastIndex);
             return Collections.max(endStages) + 1;
-        }
-        else {
+        } else {
             int endStage = stage;
             for (ArchitectureElementSymbol subElement : compositeElement.getElements()){
                 endStage = name(subElement, endStage, streamIndices);
@@ -113,8 +109,7 @@ public class LayerNameCreator {
                 name = name + "_" + arrayAccess + "_";
             }
             return name;
-        }
-        else {
+        } else {
             return createBaseName(architectureElement) + stage + createStreamPostfix(streamIndices) + "_";
         }
     }
@@ -132,11 +127,9 @@ public class LayerNameCreator {
             } else {
                 return layerDeclaration.getName().toLowerCase();
             }
-        }
-        else if (architectureElement instanceof CompositeElementSymbol){
+        } else if (architectureElement instanceof CompositeElementSymbol){
             return "group";
-        }
-        else {
+        } else {
             return architectureElement.getName();
         }
     }

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/TemplateConfiguration.java

@@ -43,6 +43,11 @@ public class TemplateConfiguration {
         configuration.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
     }
 
+    private static void quitGeneration(){
+        Log.error("Code generation is aborted");
+        System.exit(1);
+    }
+
     public Configuration getConfiguration() {
         return configuration;
     }
@@ -58,14 +63,12 @@ public class TemplateConfiguration {
         try{
             Template template = TemplateConfiguration.get().getTemplate(templatePath);
             template.process(ftlContext, writer);
-        }
-        catch (IOException e) {
+        } catch (IOException e) {
             Log.error("Freemarker could not find template " + templatePath + " :\n" + e.getMessage());
-            System.exit(1);
-        }
-        catch (TemplateException e){
+            quitGeneration();
+        } catch (TemplateException e){
             Log.error("An exception occured in template " + templatePath + " :\n" + e.getMessage());
-            System.exit(1);
+            quitGeneration();
         }
     }
 

src/main/java/de/monticore/lang/monticar/cnnarch/gluongenerator/TrainParamSupportChecker.java

@@ -25,12 +25,14 @@ public class TrainParamSupportChecker implements CNNTrainVisitor {
     public TrainParamSupportChecker() {
     }
 
-    public String unsupportedOptFlag = "unsupported_optimizer";
+    public static final String unsupportedOptFlag = "unsupported_optimizer";
 
     public List getUnsupportedElemList(){
         return this.unsupportedElemList;
     }
 
+    //Empty visit method denotes that the corresponding training parameter is supported.
+    //To set a training parameter as unsupported, add the corresponding node to the unsupportedElemList
     public void visit(ASTNumEpochEntry node){}
 
     public void visit(ASTBatchSizeEntry node){}