private void handleNavigationProperties()

in odata2-lib/odata-core/src/main/java/org/apache/olingo/odata2/core/uri/UriParserImpl.java [323:402]
70 lines of code
22 McCabe index (conditional complexity)

  private void handleNavigationProperties() throws UriSyntaxException, UriNotMatchingException, EdmException {

    final Matcher matcher = NAVIGATION_SEGMENT_PATTERN.matcher(currentPathSegment);
    if (!matcher.matches()) {
      throw new UriNotMatchingException(UriNotMatchingException.MATCHPROBLEM.addContent(currentPathSegment));
    }

    final String navigationPropertyName = percentDecode(matcher.group(1));
    final String keyPredicateName = matcher.group(2);
    final String emptyParentheses = matcher.group(3);

    final EdmTyped property = uriResult.getTargetEntitySet().getEntityType().getProperty(navigationPropertyName);
    if (property == null) {
      throw new UriNotMatchingException(UriNotMatchingException.PROPERTYNOTFOUND.addContent(navigationPropertyName));
    }

    switch (property.getType().getKind()) {
    case SIMPLE:
    case COMPLEX:
      if (keyPredicateName != null || emptyParentheses != null) {
        throw new UriSyntaxException(UriSyntaxException.INVALIDSEGMENT.addContent(currentPathSegment));
      }
      if (uriResult.isLinks()) {
        throw new UriSyntaxException(UriSyntaxException.NONAVIGATIONPROPERTY.addContent(property));
      }

      handlePropertyPath((EdmProperty) property);
      break;

    case ENTITY: // navigation properties point to entities
      final EdmNavigationProperty navigationProperty = (EdmNavigationProperty) property;
      if (keyPredicateName != null || emptyParentheses != null) {
        if (navigationProperty.getMultiplicity() != EdmMultiplicity.MANY) {
          throw new UriSyntaxException(UriSyntaxException.INVALIDSEGMENT.addContent(currentPathSegment));
        }
      }

      addNavigationSegment(keyPredicateName, navigationProperty);

      boolean many = false;
      if (navigationProperty.getMultiplicity() == EdmMultiplicity.MANY) {
        many = keyPredicateName == null;
      }

      if (pathSegments.isEmpty()) {
        if (many) {
          if (uriResult.isLinks()) {
            uriResult.setUriType(UriType.URI7B);
          } else {
            uriResult.setUriType(UriType.URI6B);
          }
        } else if (uriResult.isLinks()) {
          uriResult.setUriType(UriType.URI7A);
        } else {
          uriResult.setUriType(UriType.URI6A);
        }
      } else if (many || uriResult.isLinks()) {
        currentPathSegment = pathSegments.remove(0);
        checkCount();
        if (!uriResult.isCount()) {
          throw new UriSyntaxException(UriSyntaxException.INVALIDSEGMENT.addContent(currentPathSegment));
        }
        if (many) {
          if (uriResult.isLinks()) {
            uriResult.setUriType(UriType.URI50B);
          } else {
            uriResult.setUriType(UriType.URI15);
          }
        } else {
          uriResult.setUriType(UriType.URI50A);
        }
      } else {
        handleNavigationPathOptions();
      }
      break;

    default:
      throw new UriSyntaxException(UriSyntaxException.INVALIDPROPERTYTYPE.addContent(property.getType().getKind()));
    }
  }