AbstractPQLQuery.java 文件源码

protected boolean interpretPredicate(ParseTree tree) {
    if (tree==null) return true; // WHERE clause is not specified for this query!

    boolean result = false;

    ParseTree child = tree.getChild(0); 
    int ruleIndex = ((RuleNode)child).getRuleContext().getRuleIndex();

    switch (ruleIndex) {
        case PQLParser.RULE_proposition:
            result = interpretProposition(child);
            break;
        case PQLParser.RULE_conjunction:
            result = interpretConjunction(child);
            break;
        case PQLParser.RULE_disjunction:
            result = interpretDisjunction(child);
            break;
        case PQLParser.RULE_logicalTest:
            result = interpretLogicalTest(child);
            break;
    }

    return result;
}