File generates the XForm file

src/jmh/java/org/javarosa/benchmarks/utils/XFormFileGenerator.java

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+package org.javarosa.benchmarks.utils;
+
+import org.javarosa.benchmarks.utils.builder.XFormBuilder;
+import org.javarosa.benchmarks.utils.builder.XFormXmlDef;
+import org.javarosa.benchmarks.utils.builder.form.Choice;
+import org.javarosa.benchmarks.utils.builder.form.ChoiceSelector;
+import org.javarosa.benchmarks.utils.builder.form.Question;
+import org.javarosa.benchmarks.utils.builder.form.QuestionGroup;
+import org.javarosa.benchmarks.utils.builder.form.QuestionType;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Used to create the XForm Builder and to generate the Xform XML File
+ * into the specified working directory
+ */
+public class XFormFileGenerator {
+
+    public File generateXFormFile(String title, int noOfQuestions, int noOfQuestionGroups, int noOfInternalSecondaryInstances, int noOfExternalSecondaryInstances, int noOf2ndryInstanceElements, Path workingDirectory) throws IOException {
+        File file = new File(workingDirectory.resolve(title + ".xml").toString());
+        FileWriter fileWriter = new FileWriter(file);
+        XFormBuilder xFormBuilder = generateXFormBuilder(title, noOfQuestions, noOfQuestionGroups, noOfInternalSecondaryInstances, noOfExternalSecondaryInstances, noOf2ndryInstanceElements,workingDirectory);
+        fileWriter.write(xFormBuilder.build());
+        fileWriter.close();
+        return file;
+    }
+
+    public XFormBuilder generateXFormBuilder(String title, int noOfQuestions, int noOfQuestionGroups, int noOfInternalSecondaryInstances, int noOfExternalSecondaryInstances, int noOf2ndryInstanceElements, Path workingDirectory) throws IOException {
+        List<ChoiceSelector> internalSecondaryInstances = generateOptionSelectors(ChoiceSelector.Type.INTERNAL, noOfInternalSecondaryInstances, noOf2ndryInstanceElements);
+        List<ChoiceSelector> externalSecondaryInstances = generateOptionSelectors( ChoiceSelector.Type.EXTERNAL, noOfExternalSecondaryInstances, noOf2ndryInstanceElements);
+        List<ChoiceSelector> secondaryInstances = new ArrayList<>();
+        secondaryInstances.addAll(internalSecondaryInstances);
+        secondaryInstances.addAll(externalSecondaryInstances);
+        XFormXmlDef XFormXmlDef =
+            new XFormXmlDef(
+                title,
+                generateQuestionGroups(noOfQuestionGroups, secondaryInstances),
+                generateQuestions(noOfQuestions, secondaryInstances),
+                internalSecondaryInstances,
+                externalSecondaryInstances);
+
+        XFormBuilder xFormFileBuilder = new XFormBuilder(XFormXmlDef, workingDirectory);
+        return xFormFileBuilder;
+    }
+
+    private List<Question> generateQuestions(int noOfQuestions, List<ChoiceSelector> choiceSelectorList){
+        List<Question> questions = new ArrayList<>(noOfQuestions);
+        while(noOfQuestions > 0){
+            questions.add(0, autoGenerate(noOfQuestions, choiceSelectorList));
+            noOfQuestions--;
+        }
+        return questions;
+    }
+
+    private Question autoGenerate(int index, List<ChoiceSelector> choiceSelectorList) {
+        Random random = new Random();
+        Question question;
+        ChoiceSelector choiceSelector = null;
+        if(!choiceSelectorList.isEmpty()){
+            int randomOptionSelector;
+            randomOptionSelector = random.nextInt(choiceSelectorList.size());
+            choiceSelector = choiceSelectorList.get(randomOptionSelector);
+        }
+
+        question = new Question(QuestionType.TEXT,"enter_input_" + index,"What is answer to question" + index + "?", "Hint to question " + index, choiceSelector);
+
+        return question;
+    }
+
+    private List<QuestionGroup> generateQuestionGroups(int count, List<ChoiceSelector> choiceSelectorList){
+        List<QuestionGroup> questionGroups = new ArrayList<>(count);
+        while(count > 0){
+            questionGroups.add(0, new QuestionGroup("group"+ count, generateQuestions(4, choiceSelectorList)));
+            count--;
+        }
+        return questionGroups;
+    }
+
+    private List<ChoiceSelector> generateOptionSelectors(ChoiceSelector.Type type, int noOfOptionSelectors, int noOf2ndryInstanceElements){
+        List<ChoiceSelector> instances = new ArrayList<>(noOfOptionSelectors);
+        String secondaryInstanceType = type.toString().toLowerCase();
+        String instanceIdTemplate = secondaryInstanceType +"_secondary_instance_%sE_%0" + (noOfOptionSelectors + "").length() +"d";
+        while(noOfOptionSelectors > 0){
+            instances.add(0, generateOptionSelector(String.format(instanceIdTemplate, noOf2ndryInstanceElements, noOfOptionSelectors), noOf2ndryInstanceElements));
+            noOfOptionSelectors--;
+        }
+        return instances;
+    }
+
+    private ChoiceSelector generateOptionSelector(String instanceId, int noOfOptions){
+        return new ChoiceSelector(instanceId, generateOptions(noOfOptions));
+    }
+
+    private List<Choice> generateOptions(int noOfOptions){
+        List<Choice> choices = new ArrayList<>();
+        for(int i = 0; i < noOfOptions; i++){
+            choices.add(new Choice("item " + (i + 1), "option" + (i + 1)));
+        }
+        return choices;
+    }
+
+}