public String addWadlToRegistry(
      RequestContext requestContext, Resource resource, String resourcePath, boolean skipValidation)
      throws RegistryException {
    String wadlName = RegistryUtils.getResourceName(resourcePath);
    String version =
        requestContext.getResource().getProperty(RegistryConstants.VERSION_PARAMETER_NAME);

    if (version == null) {
      version = CommonConstants.WADL_VERSION_DEFAULT_VALUE;
      requestContext.getResource().setProperty(RegistryConstants.VERSION_PARAMETER_NAME, version);
    }

    OMElement wadlElement;
    String wadlContent;
    Object resourceContent = resource.getContent();
    if (resourceContent instanceof String) {
      wadlContent = (String) resourceContent;
    } else {
      wadlContent = new String((byte[]) resourceContent);
    }

    try {
      XMLStreamReader reader =
          XMLInputFactory.newInstance().createXMLStreamReader(new StringReader(wadlContent));
      StAXOMBuilder builder = new StAXOMBuilder(reader);
      wadlElement = builder.getDocumentElement();
    } catch (XMLStreamException e) {
      // This exception is unexpected because the WADL already validated
      String msg = "Unexpected error occured " + "while reading the WADL at " + resourcePath + ".";
      log.error(msg);
      throw new RegistryException(msg, e);
    }

    String wadlNamespace = wadlElement.getNamespace().getNamespaceURI();
    String namespaceSegment =
        CommonUtil.derivePathFragmentFromNamespace(wadlNamespace).replace("//", "/");
    String actualPath =
        getChrootedWadlLocation(requestContext.getRegistryContext())
            + namespaceSegment
            + version
            + "/"
            + wadlName;

    OMElement grammarsElement =
        wadlElement.getFirstChildWithName(new QName(wadlNamespace, "grammars"));

    if (StringUtils.isNotBlank(requestContext.getSourceURL())) {
      String uri = requestContext.getSourceURL();
      if (!skipValidation) {
        validateWADL(uri);
      }

      if (resource.getUUID() == null) {
        resource.setUUID(UUID.randomUUID().toString());
      }

      String wadlBaseUri = uri.substring(0, uri.lastIndexOf("/") + 1);
      if (grammarsElement != null) {
        // This is to avoid evaluating the grammars import when building AST
        grammarsElement.detach();
        wadlElement.addChild(resolveImports(grammarsElement, wadlBaseUri, version));
      }
    } else {
      if (!skipValidation) {
        File tempFile = null;
        BufferedWriter bufferedWriter = null;
        try {
          tempFile = File.createTempFile(wadlName, null);
          bufferedWriter = new BufferedWriter(new FileWriter(tempFile));
          bufferedWriter.write(wadlElement.toString());
          bufferedWriter.flush();
        } catch (IOException e) {
          String msg = "Error occurred while reading the WADL File";
          log.error(msg, e);
          throw new RegistryException(msg, e);
        } finally {
          if (bufferedWriter != null) {
            try {
              bufferedWriter.close();
            } catch (IOException e) {
              String msg = "Error occurred while closing File writer";
              log.warn(msg, e);
            }
          }
        }
        validateWADL(tempFile.toURI().toString());
        try {
          delete(tempFile);
        } catch (IOException e) {
          String msg =
              "An error occurred while deleting the temporary files from local file system.";
          log.warn(msg, e);
          throw new RegistryException(msg, e);
        }
      }

      if (grammarsElement != null) {
        grammarsElement = resolveImports(grammarsElement, null, version);
        wadlElement.addChild(grammarsElement);
      }
    }

    requestContext.setResourcePath(new ResourcePath(actualPath));
    if (resource.getProperty(CommonConstants.SOURCE_PROPERTY) == null) {
      resource.setProperty(CommonConstants.SOURCE_PROPERTY, CommonConstants.SOURCE_AUTO);
    }
    registry.put(actualPath, resource);
    addImportAssociations(actualPath);
    if (getCreateService()) {
      OMElement serviceElement =
          RESTServiceUtils.createRestServiceArtifact(
              wadlElement,
              wadlName,
              version,
              RegistryUtils.getRelativePath(requestContext.getRegistryContext(), actualPath));
      String servicePath = RESTServiceUtils.addServiceToRegistry(requestContext, serviceElement);
      registry.addAssociation(servicePath, actualPath, CommonConstants.DEPENDS);
      registry.addAssociation(actualPath, servicePath, CommonConstants.USED_BY);
      String endpointPath = createEndpointElement(requestContext, wadlElement, version);
      if (endpointPath != null) {
        registry.addAssociation(servicePath, endpointPath, CommonConstants.DEPENDS);
        registry.addAssociation(endpointPath, servicePath, CommonConstants.USED_BY);
      }
    }

    return resource.getPath();
  }
  public String importWADLToRegistry(
      RequestContext requestContext, String commonLocation, boolean skipValidation)
      throws RegistryException {

    ResourcePath resourcePath = requestContext.getResourcePath();
    String wadlName = RegistryUtils.getResourceName(resourcePath.getPath());
    String version =
        requestContext.getResource().getProperty(RegistryConstants.VERSION_PARAMETER_NAME);

    if (version == null) {
      version = CommonConstants.WADL_VERSION_DEFAULT_VALUE;
      requestContext.getResource().setProperty(RegistryConstants.VERSION_PARAMETER_NAME, version);
    }

    String uri = requestContext.getSourceURL();
    if (!skipValidation) {
      validateWADL(uri);
    }

    Registry registry = requestContext.getRegistry();
    Resource resource = registry.newResource();
    if (resource.getUUID() == null) {
      resource.setUUID(UUID.randomUUID().toString());
    }
    resource.setMediaType(wadlMediaType);
    resource.setProperties(requestContext.getResource().getProperties());

    ByteArrayOutputStream outputStream;
    OMElement wadlElement;
    try {
      InputStream inputStream = new URL(uri).openStream();

      outputStream = new ByteArrayOutputStream();
      int nextChar;
      while ((nextChar = inputStream.read()) != -1) {
        outputStream.write(nextChar);
      }
      outputStream.flush();
      wadlElement = AXIOMUtil.stringToOM(new String(outputStream.toByteArray()));
      // to validate XML
      wadlElement.toString();
    } catch (Exception e) {
      // This exception is unexpected because the WADL already validated
      throw new RegistryException(
          "Unexpected error occured " + "while reading the WADL at" + uri, e);
    }

    String wadlNamespace = wadlElement.getNamespace().getNamespaceURI();
    String namespaceSegment =
        CommonUtil.derivePathFragmentFromNamespace(wadlNamespace).replace("//", "/");

    OMElement grammarsElement =
        wadlElement.getFirstChildWithName(new QName(wadlNamespace, "grammars"));
    String wadlBaseUri = uri.substring(0, uri.lastIndexOf("/") + 1);
    if (grammarsElement != null) {
      grammarsElement.detach();
      wadlElement.addChild(resolveImports(grammarsElement, wadlBaseUri, version));
    }

    String actualPath;
    if (commonLocation != null) {
      actualPath = commonLocation + namespaceSegment + version + "/" + wadlName;
    } else {
      actualPath =
          RegistryConstants.GOVERNANCE_REGISTRY_BASE_PATH
              + commonWADLLocation
              + namespaceSegment
              + version
              + "/"
              + wadlName;
    }
    if (resource.getProperty(CommonConstants.SOURCE_PROPERTY) == null) {
      resource.setProperty(CommonConstants.SOURCE_PROPERTY, CommonConstants.SOURCE_AUTO);
    }

    resource.setContent(wadlElement.toString());
    requestContext.setResourcePath(new ResourcePath(actualPath));
    registry.put(actualPath, resource);
    addImportAssociations(actualPath);
    if (createService) {
      OMElement serviceElement =
          RESTServiceUtils.createRestServiceArtifact(
              wadlElement,
              wadlName,
              version,
              RegistryUtils.getRelativePath(requestContext.getRegistryContext(), actualPath));
      String servicePath = RESTServiceUtils.addServiceToRegistry(requestContext, serviceElement);
      addDependency(servicePath, actualPath);
      String endpointPath = createEndpointElement(requestContext, wadlElement, version);
      if (endpointPath != null) {
        addDependency(servicePath, endpointPath);
      }
    }

    return actualPath;
  }