check collections if they need a presence boolean ------------------------------------------------- Key: JBPM-1217 URL: http://jira.jboss.com/jira/browse/JBPM-1217 Project: JBoss jBPM Issue Type: Task Components: PVM Reporter: Tom Baeyens If in the code you need to know if there are elements in a collection, this will result into an extra query for the entities. If in most cases, the collection is empty, it might be an optimization to add a boolean pressence indicator next to the collection. The class could maintain that boolean to indicate if elements are available in the collection. That way, the extra query is saved if in the code you only need to do a collection-presence check. For sure this is useful for the ProcessChanges. But probably for a lot of the other collections as well. This shouldn't be applied blindfolded. Each case should be evaluated in terms of the number of times the presence check is executed in the code.