AbstractPQLQuery.java 文件源码

protected Set<PQLTask> interpretSetOfTasks(ParseTree tree) {        
    ParseTree child = tree.getChild(0); 
    int ruleIndex = ((RuleNode)child).getRuleContext().getRuleIndex();

    switch (ruleIndex) {
        case PQLParser.RULE_tasks:
            return interpretTasks(child);
        case PQLParser.RULE_union:
            return interpretUnion(child);
        case PQLParser.RULE_difference:
            return interpretDifference(child);
        case PQLParser.RULE_intersection:
            return interpretIntersection(child);
    }

    return new HashSet<PQLTask>();
}