private TemplateResult getRelations(
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);
String fromId = param.get(Helper.Keys.FromId);
String toId = param.get(Helper.Keys.ToId);
if (relationId != null) {
Relation relation = dataSource.getRelation(relationId);
return template.transform(relation);
} else if (fromId != null || toId != null) {
Relation[] relations = dataSource.getRelations(fromId, toId);
return template.transform(relations);
} else {
Relation[] relations = dataSource.getRelations();
return template.transform(relations);
}
}
