private static Set processMultiValuedComplexAttribute()

in scim-tools/src/main/java/org/apache/directory/scim/tools/diff/PatchGenerator.java [184:231]
36 lines of code
7 McCabe index (conditional complexity)

  private static Set<PatchOperation> processMultiValuedComplexAttribute(Schema prefixSchema, List<Schema.Attribute> parentAttributes, Schema.Attribute attribute, Object left, Object right) {

    Set<PatchOperation> patchOperations = new HashSet<>();

    if (!isCollectionOrNull(left) || !isCollectionOrNull(right)) {
      throw new IllegalArgumentException("The values of attribute '" + attributePath(prefixSchema, parentAttributes, attribute) + "' must be a Collection.");
    }

    Collection<Object> leftList = (Collection<Object>) left;
    Collection<Object> rightList = (Collection<Object>) right;

    if (isNotEmpty(leftList)) {

      // Look for items to REMOVE
      if (isNotEmpty(rightList)) {
        List<Object> removed = new ArrayList<>(leftList);
        removed.removeAll(rightList);
        removed.forEach(item -> {
          patchOperations.add(new PatchOperation()
            .setOperation(PatchOperation.Type.REMOVE)
            .setPath(new PatchOperationPath(attributeExpression(prefixSchema, parentAttributes, attribute, item))));
        });
      } else {
        // Empty List, remove attribute
        patchOperations.add(new PatchOperation()
          .setOperation(PatchOperation.Type.REMOVE)
          .setPath(new PatchOperationPath(attributeExpression(prefixSchema, parentAttributes, attribute))));
      }
    }

    if (isNotEmpty(rightList)) {
      List<Object> added = new ArrayList<>(rightList);

      // remove values already present
      if (isNotEmpty(leftList)) {
        added.removeAll(leftList);
      }

      added.forEach(item -> {
        patchOperations.add(new PatchOperation()
          .setOperation(PatchOperation.Type.ADD)
          .setPath(new PatchOperationPath(attributeExpression(prefixSchema, parentAttributes, attribute)))
          .setValue(item));
      });
    }

    return patchOperations;
  }