public static void generateFromJavaInterfaces()

in java5tools/src/main/java/org/apache/tuscany/sdo/generate/Interface2JavaGenerator.java [110:221]
94 lines of code
16 McCabe index (conditional complexity)

  public static void generateFromJavaInterfaces(ClassLoader classLoader, List javaInterfaces, String packageURI, String targetDirectory, String javaPackage, String prefix, int genOptions)
  {
    try
    {
      // Initialize the SDO runtime
      DataObjectUtil.initRuntime();
      EPackage.Registry packageRegistry = new EPackageRegistryImpl(EPackage.Registry.INSTANCE);

      // Create an EPackage for the generated SDO
      if (packageURI == null)
        packageURI = "http://" + javaPackage;
      EPackage implEPackage = EcoreFactory.eINSTANCE.createEPackage();
      implEPackage.setNsURI(packageURI);
      String shortName = shortName(packageURI);
      implEPackage.setName(shortName);
      implEPackage.setNsPrefix(shortName.toLowerCase());
      packageRegistry.put(packageURI, implEPackage);

      // Create EClasses for all the given Java interfaces
      Map eClasses = new HashMap();
      for (Iterator iter = javaInterfaces.iterator(); iter.hasNext();)
      {
        String interfaceName = (String)iter.next();
        Class instanceClass = Class.forName(interfaceName, true, classLoader);

        EClass implEClass = EcoreFactory.eINSTANCE.createEClass();
        String className = shortName(instanceClass.getName());
        implEClass.setName(className);
        implEClass.setInstanceClass(instanceClass);

        eClasses.put(instanceClass, implEClass);
        implEPackage.getEClassifiers().add(implEClass);
      }

      // Populate the EClasses with EAttributes and EReferences for their properties
      for (Iterator iter = implEPackage.getEClassifiers().iterator(); iter.hasNext();)
      {
        EClass implEClass = (EClass)iter.next();
        Class instanceClass = implEClass.getInstanceClass();
        Method[] methods = instanceClass.getMethods();
        for (int m = 0; m < methods.length; m++)
        {
          Method method = methods[m];
          String propertyName = null;
          if (method.getName().startsWith("get"))
            propertyName = method.getName().substring(3);
          else if (method.getName().startsWith("is"))
            propertyName = method.getName().substring(2);

          if (propertyName != null)
          {
            if (propertyName.length() > 1)
              propertyName = propertyName.substring(0, 1).toLowerCase() + propertyName.substring(1);

            Class propertyClass = method.getReturnType();
            EClass propertyEClass = (EClass)eClasses.get(propertyClass);

            if (propertyEClass != null)
            {
              // The property is another SDO, create an EReference to represent the property
              EReference reference = EcoreFactory.eINSTANCE.createEReference();
              reference.setName(propertyName);
              reference.setContainment(true);
              reference.setEType(propertyEClass);
              implEClass.getEStructuralFeatures().add(reference);

            }
            else
            {
              // The property is a List<T> and T is an SDO, created a 0..many EReference to represent the property
              if (propertyClass == List.class)
              {
                Type genericType = method.getGenericReturnType();
                if (genericType instanceof ParameterizedType)
                {
                  ParameterizedType parameterizedType = (ParameterizedType)genericType;
                  Type[] targs = parameterizedType.getActualTypeArguments();
                  if (targs.length != 0 && eClasses.containsKey(targs[0]))
                  {
                    propertyEClass = (EClass)eClasses.get(targs[0]);
                    if (propertyEClass != null)
                    {
                      EReference reference = EcoreFactory.eINSTANCE.createEReference();
                      reference.setName(propertyName);
                      reference.setContainment(true);
                      reference.setEType(propertyEClass);
                      reference.setUpperBound(-1);
                      implEClass.getEStructuralFeatures().add(reference);
                    }
                  }
                }
                continue;
              }

              // The property is a regular Java type / not an SDO, create an EAttribute to represent it
              EAttribute attribute = EcoreFactory.eINSTANCE.createEAttribute();
              attribute.setName(propertyName);
              EDataType dataType = (EDataType)TypeHelper.INSTANCE.getType(propertyClass);
              attribute.setEType(dataType);
              implEClass.getEStructuralFeatures().add(attribute);
            }
          }
        }
      }

      generatePackages(packageRegistry.values(), packageURI, shortName, targetDirectory, javaPackage, prefix, genOptions);
    }
    catch (ClassNotFoundException e)
    {
      e.printStackTrace();
    }
  }