Examples with ExpressionRuntime org.beetl.core.statement.ExpressionRuntime used on opensource projects

Example 1 with ExpressionRuntime

use of org.beetl.core.statement.ExpressionRuntime in project beetl2.0 by javamonkey.

the class AntlrProgramBuilder method parseFunExp.

protected FunctionExpression parseFunExp(FunctionCallContext ctx) {
    ExpressionListContext expListCtx = ctx.expressionList();
    Expression[] exps = this.getExprssionList(expListCtx);
    List<VarAttributeContext> vaListCtx = ctx.varAttribute();
    Safe_outputContext soctx = ctx.safe_output();
    Expression safeExp = null;
    boolean hasSafe = false;
    if (soctx != null) {
        safeExp = this.parseSafeOutput(soctx);
        hasSafe = true;
    }
    if (this.pbCtx.isSafeOutput) {
        hasSafe = true;
    }
    VarAttribute[] vs = this.parseVarAttribute(vaListCtx);
    List<TerminalNode> idList = ctx.functionNs().Identifier();
    String nsId = this.getID(idList);
    GrammarToken btToken = new org.beetl.core.statement.GrammarToken(nsId, ctx.start.getLine(), 0);
    // 需要做些特殊处理的函数
    if (safeParameters.contains(nsId)) {
        if (exps.length != 0) {
            Expression one = exps[0];
            if (one instanceof VarRef) {
                // 强制为变量引用增加一个安全输出
                VarRef ref = (VarRef) one;
                if (!ref.hasSafe) {
                    ref.hasSafe = true;
                    ref.safe = null;
                }
            }
        }
    } else if (nsId.equals("has")) {
        if (exps.length != 0) {
            Expression one = exps[0];
            if (one instanceof VarRef) {
                // 强制为变量引用增加一个安全输出
                VarRef ref = (VarRef) one;
                String name = ref.token.text;
                Literal newExp = new Literal(name, ref.token);
                // 将变量引用转化为字符串
                exps[0] = newExp;
            }
        }
    } else if (nsId.equals("debug")) {
        // debug函数传递额外的行数
        Literal l = new Literal(btToken.line, btToken);
        Expression[] newExps = new Expression[exps.length + 2];
        System.arraycopy(exps, 0, newExps, 0, exps.length);
        String[] expStr = this.getExpressionString(expListCtx);
        newExps[newExps.length - 2] = new Literal(expStr, btToken);
        newExps[newExps.length - 1] = l;
        for (int i = 0; i < exps.length; i++) {
            if (!(exps[i] instanceof VarRef)) {
                expStr[i] = null;
            }
        }
        exps = newExps;
    // 可以通过配置查看是否支持debug，2.1再做
    } else if (nsId.equals("decode")) {
        Expression[] newExps = new Expression[exps.length];
        if (newExps.length >= 4) {
            newExps[0] = exps[0];
            newExps[1] = exps[1];
            for (int i = 2; i < exps.length; i++) {
                // 参数改成runtime 执行
                newExps[i] = new ExpressionRuntime(exps[i]);
            }
            exps = newExps;
        } else {
        // 错误的使用了decode函数，不管了，等后面报错吧
        }
    }
    FunctionExpression fe = new FunctionExpression(nsId, exps, vs, hasSafe, safeExp, btToken);
    return fe;
}