private TemplateResult updateRelation(
DataAccess access, DataTemplate template, Map<String, String> param) throws BaseException {
DataSource dataSource = getDataSource(access, param.get(Helper.Keys.SourceId));
if (dataSource.getState() != DataInformation.DataState.READY)
throw new NotReadyException("The datasource %s is not yet ready.", dataSource.getId());
String relationId = param.get(Helper.Keys.RelationId);
if (relationId == null)
throw new MissingArgumentException("The argument %s is missing!", Helper.Keys.RelationId);
String fromId = param.get(Helper.Keys.FromId);
if (fromId == null)
throw new MissingArgumentException("The argument %s is missing!", Helper.Keys.FromId);
String toId = param.get(Helper.Keys.ToId);
if (toId == null)
throw new MissingArgumentException("The argument %s is missing!", Helper.Keys.ToId);
String type = param.get(Helper.Keys.Type);
if (type == null)
throw new MissingArgumentException("The argument %s is missing!", Helper.Keys.Type);
Relation relation = dataSource.updateRelation(relationId, fromId, toId, type, param);
return template.transform(relation);
}
