public void loadModels(
     EOGeneratorModel eogeneratorModel,
     EOModelGroup modelGroup,
     List<EOModelReference> modelReferences,
     List<EOModel> loadedModels,
     IProgressMonitor monitor)
     throws MalformedURLException, IOException, EOModelException {
   for (EOModelReference modelRef : modelReferences) {
     if (monitor.isCanceled()) {
       throw new OperationCanceledException("EOGenerator canceled.");
     }
     URL modelURL = getModelURL(eogeneratorModel, modelRef);
     EOModel model = modelGroup.loadModelFromURL(modelURL);
     loadedModels.add(model);
   }
 }
  public boolean generate(
      EOGeneratorModel eogeneratorModel,
      StringBuffer results,
      EOModelGroup preloadedModelGroup,
      Class resourceLoaderClass,
      IProgressMonitor monitor)
      throws Exception {
    boolean showResults = false;

    String superclassTemplateName = eogeneratorModel.getJavaTemplate();
    String subclassTemplateName = eogeneratorModel.getSubclassJavaTemplate();

    boolean eogeneratorJava14 = eogeneratorModel.isJava14();
    if (eogeneratorJava14) {
      if (superclassTemplateName == null || superclassTemplateName.length() == 0) {
        superclassTemplateName = "_Entity14.java";
      }
      if (subclassTemplateName == null || subclassTemplateName.length() == 0) {
        subclassTemplateName = "Entity14.java";
      }
    } else {
      if (superclassTemplateName == null || superclassTemplateName.length() == 0) {
        superclassTemplateName = "_Entity.java";
      }
      if (subclassTemplateName == null || subclassTemplateName.length() == 0) {
        subclassTemplateName = "Entity.java";
      }
    }

    Bundle templateBundle = _insideEclipse ? Activator.getDefault().getBundle() : null;
    VelocityEngine velocityEngine =
        WOLipsVelocityUtils.createVelocityEngine(
            "EOGenerator",
            templateBundle,
            eogeneratorModel.getTemplateDir(),
            eogeneratorModel.getProjectPath(),
            _insideEclipse,
            resourceLoaderClass);
    VelocityContext context = new VelocityContext();

    List<EOModel> models = new LinkedList<EOModel>();
    EOModelRenderContext renderContext = new EOModelRenderContext();
    try {
      String prefix = eogeneratorModel.getPrefix();
      if (prefix != null) {
        renderContext.setPrefix(prefix);
      }
      renderContext.setSuperclassPackage(eogeneratorModel.getSuperclassPackage());
      String eogenericRecordClassName = eogeneratorModel.getDefineValueNamed("EOGenericRecord");
      if (eogenericRecordClassName != null) {
        renderContext.setEOGenericRecordClassName(eogenericRecordClassName);
      }
      renderContext.setJavaClientCommon(
          eogeneratorModel.isJavaClientCommon() != null
              && eogeneratorModel.isJavaClientCommon().booleanValue());
      renderContext.setJavaClient(
          eogeneratorModel.isJavaClient() != null
              && eogeneratorModel.isJavaClient().booleanValue());
      EOModelRenderContext.setRenderContext(renderContext);

      EOModelGroup modelGroup;
      if (preloadedModelGroup == null) {
        modelGroup = new EOModelGroup();

        Set<EOModelVerificationFailure> failures = new HashSet<EOModelVerificationFailure>();

        if (BooleanUtils.isTrue(eogeneratorModel.isLoadModelGroup())) {
          for (EOModelReference eomodelReference : eogeneratorModel.getModels()) {
            EOModelGroup generatingModelGroup = new EOModelGroup();
            URL modelURL = getModelURL(eogeneratorModel, eomodelReference);
            IEOModelGroupFactory.Utility.loadModelGroup(
                modelURL, generatingModelGroup, failures, true, modelURL, monitor);
            if (monitor.isCanceled()) {
              throw new OperationCanceledException("EOGenerator canceled.");
            }
            EOModel generatingModel = generatingModelGroup.getEditingModel();
            models.add(generatingModel);

            for (EOModel model : generatingModelGroup.getModels()) {
              if (!modelGroup.containsModelNamed(model.getName())) {
                modelGroup.addModel(model);
              }
            }
          }
        } else {
          loadModels(eogeneratorModel, modelGroup, eogeneratorModel.getModels(), models, monitor);
          loadModels(
              eogeneratorModel,
              modelGroup,
              eogeneratorModel.getRefModels(),
              new LinkedList<EOModel>(),
              monitor);

          modelGroup.resolve(failures);
          modelGroup.verify(failures);
        }

        for (EOModelVerificationFailure failure : failures) {
          if (!failure.isWarning()) {
            results.append("Error: " + failure.getMessage() + "\n");
            showResults = true;
          }
        }
      } else {
        modelGroup = preloadedModelGroup;
        for (EOModelReference modelRef : eogeneratorModel.getModels()) {
          String modelName = modelRef.getName();
          EOModel model = modelGroup.getModelNamed(modelName);
          if (model == null) {
            throw new RuntimeException(
                "There was no model named '" + modelName + "' in this model group.");
          }
          models.add(model);
        }
      }

      File superclassDestination = new File(eogeneratorModel.getDestination());
      if (!superclassDestination.isAbsolute()) {
        IPath projectPath = eogeneratorModel.getProjectPath();
        if (projectPath != null) {
          superclassDestination = new File(projectPath.toFile(), eogeneratorModel.getDestination());
        }
      }
      if (!superclassDestination.exists()) {
        if (!superclassDestination.mkdirs()) {
          throw new IOException("Failed to create destination '" + superclassDestination + "'.");
        }
      }

      File subclassDestination = new File(eogeneratorModel.getSubclassDestination());
      if (!subclassDestination.isAbsolute()) {
        IPath projectPath = eogeneratorModel.getProjectPath();
        if (projectPath != null) {
          subclassDestination =
              new File(projectPath.toFile(), eogeneratorModel.getSubclassDestination());
        }
      }
      if (!subclassDestination.exists()) {
        if (!subclassDestination.mkdirs()) {
          throw new IOException(
              "Failed to create subclass destination '" + subclassDestination + "'.");
        }
      }

      // String filePathTemplate = eogeneratorModel.getFilenameTemplate();
      // if (filePathTemplate == null || filePathTemplate.trim().length()
      // == 0) {
      // }

      context.put("eogeneratorModel", eogeneratorModel);
      context.put("date", new Date());
      context.put("calendar", Calendar.getInstance());
      for (Define define : eogeneratorModel.getDefines()) {
        context.put(define.getName(), define.getValue());
      }
      context.put("list", new ListTool());
      context.put("set", new SetTool());
      // context.put("sorter", new SortTool());
      String extension = eogeneratorModel.getExtension();
      for (EOModel model : models) {
        if (monitor.isCanceled()) {
          throw new OperationCanceledException("EOGenerator canceled.");
        }
        // System.out.println("Generating " + model.getName() + " ...");
        context.put("model", model);

        for (EOEntity entity : model.getEntities()) {
          if (monitor.isCanceled()) {
            throw new OperationCanceledException("EOGenerator canceled.");
          }
          // System.out.println("Generating " + model.getName() + "."
          // + entity.getName() + " ...");
          context.put("entity", entity);

          String classNameWithPackage = renderContext.getClassNameForEntity(entity);
          boolean eogenericRecord =
              classNameWithPackage == null
                  || (classNameWithPackage.endsWith("GenericRecord")
                      && !entity.getName().endsWith("GenericRecord"));
          if (entity.isGenerateSource() && !eogenericRecord) {
            String prefixClassNameWithPackage = entity.getPrefixClassName();
            context.put("className", classNameWithPackage);
            context.put("prefixClassName", prefixClassNameWithPackage);
            context.put("packageName", entity.getPackageName());
            context.put("classNameWithoutPackage", entity.getClassNameWithoutPackage());
            context.put("prefixClassNameWithoutPackage", entity.getPrefixClassNameWithoutPackage());

            String superclassFileTemplate;
            // StringWriter superclassFilePathWriter = new
            // StringWriter();
            // velocityEngine.evaluate(context,
            // superclassFilePathWriter, "LOG",
            // superclassFileTemplate);
            if (BooleanUtils.isFalse(eogeneratorModel.isPackageDirs())) {
              superclassFileTemplate = entity.getPrefixClassNameWithoutPackage();
            } else {
              superclassFileTemplate = prefixClassNameWithPackage.toString().replace('.', '/');
            }

            String superclassFilePath = superclassFileTemplate + "." + extension;
            File superclassFile = new File(superclassDestination, superclassFilePath);
            File superclassFolder = superclassFile.getParentFile();
            if (!superclassFolder.exists()) {
              if (!superclassFolder.mkdirs()) {
                throw new IOException(
                    "Unable to make superclass folder '" + superclassFolder + "'.");
              }
            }
            WOLipsVelocityUtils.writeTemplate(
                velocityEngine, context, superclassTemplateName, superclassFile);

            String subclassFileTemplate;
            // StringWriter subclassFilePathWriter = new
            // StringWriter();
            // velocityEngine.evaluate(context,
            // subclassFilePathWriter, "LOG", subclassFileTemplate);
            if (BooleanUtils.isFalse(eogeneratorModel.isPackageDirs())) {
              subclassFileTemplate = entity.getClassNameWithoutPackage();
            } else {
              subclassFileTemplate = classNameWithPackage.toString().replace('.', '/');
            }

            String subclassFilePath = subclassFileTemplate + "." + extension;
            File subclassFile = new File(subclassDestination, subclassFilePath);
            File subclassFolder = subclassFile.getParentFile();
            if (!subclassFolder.exists()) {
              if (!subclassFolder.mkdirs()) {
                throw new IOException("Unable to make subclass folder '" + superclassFolder + "'.");
              }
            }
            if (!subclassFile.exists()) {
              WOLipsVelocityUtils.writeTemplate(
                  velocityEngine, context, subclassTemplateName, subclassFile);
            }
          }
        }
      }
    } finally {
      EOModelRenderContext.clearRenderContext();
    }
    return showResults;
  }