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

Example 21 with Expression

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

the class AntlrProgramBuilder method parseTag.

protected TagStatement parseTag(FunctionTagCallContext fc) {
    String id = this.getID(fc.functionNs().Identifier());
    ExpressionListContext expListCtx = fc.expressionList();
    List<ExpressionContext> list = null;
    if (expListCtx != null) {
        list = fc.expressionList().expression();
    } else {
        list = Collections.EMPTY_LIST;
    }
    Expression[] expList = this.parseExpressionCtxList(list);
    if (id.equals("htmltagvar")) {
        int line = fc.functionNs().getStart().getLine();
        // 标签具有绑定变量功能
        Literal l = (Literal) expList[2];
        String varList = (String) l.obj;
        String[] vars = varList.split(",");
        // 定义的变量仅仅在标签体内可见
        this.pbCtx.enterBlock();
        VarDefineNode[] varDefine = new VarDefineNode[vars.length];
        for (int i = 0; i < vars.length; i++) {
            VarDefineNode varNode = new VarDefineNode(this.getBTToken(vars[i].trim(), line));
            this.pbCtx.addVarAndPostion(varNode);
            varDefine[i] = varNode;
        }
        BlockContext blockCtx = fc.block();
        Statement block = parseBlock(blockCtx.statement(), blockCtx);
        this.pbCtx.exitBlock();
        TagFactory tf = this.gt.getTagFactory(id);
        if (tf == null) {
            BeetlException ex = new BeetlException(BeetlException.TAG_NOT_FOUND);
            ex.pushToken(this.getBTToken(id, fc.functionNs().getStart().getLine()));
            throw ex;
        }
        TagStatement tag = new TagVarBindingStatement(id, expList, block, varDefine, this.getBTToken(id, line));
        return tag;
    } else {
        BlockContext blockCtx = fc.block();
        Statement block = parseBlock(blockCtx.statement(), blockCtx);
        TagFactory tf = this.gt.getTagFactory(id);
        if (tf == null) {
            BeetlException ex = new BeetlException(BeetlException.TAG_NOT_FOUND);
            ex.pushToken(this.getBTToken(id, fc.functionNs().getStart().getLine()));
            throw ex;
        }
        TagStatement tag = new TagStatement(id, expList, block, this.getBTToken(id, fc.functionNs().getStart().getLine()));
        return tag;
    }
}

Example 22 with Expression

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

the class AntlrProgramBuilder method parseAssingInExp.

/**
 *  赋值变量
 * @param agc
 * @return
 */
protected VarRefAssignExpress parseAssingInExp(AssignGeneralInExpContext agc) {
    VarRefAssignExpress vas = null;
    ExpressionContext expCtx = agc.generalAssignExp().expression();
    Expression exp = parseExpress(expCtx);
    VarRefContext varRefCtx = agc.generalAssignExp().varRef();
    VarRef ref = this.parseVarRefInLeftExpression(varRefCtx);
    vas = new VarRefAssignExpress(exp, ref);
    if (ref.attributes.length == 0) {
        // 变量定义:
        Token token = varRefCtx.Identifier().getSymbol();
        if (pbCtx.hasDefined(token.getText()) != null) {
            registerVar(vas);
            return vas;
        } else {
            BeetlException ex = new BeetlException(BeetlException.VAR_NOT_DEFINED);
            ex.pushToken(this.getBTToken(token));
            throw ex;
        }
    }
    return vas;
}

Example 23 with Expression

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

the class AntlrProgramBuilder method parseIf.

protected IfStatement parseIf(IfStContext ctx) {
    ParExpressionContext pe = ctx.parExpression();
    ExpressionContext expCtx = pe.expression();
    Expression exp = this.parseExpress(expCtx);
    StatementContext ifStatCtx = ctx.statement(0);
    Statement ifStat = this.parseStatment(ifStatCtx);
    StatementContext elseStatCtx = ctx.statement(1);
    Statement elseStat = null;
    if (elseStatCtx != null) {
        elseStat = this.parseStatment(elseStatCtx);
    }
    return new IfStatement(exp, ifStat, elseStat, this.getBTToken(ctx.If().getSymbol()));
}

Example 24 with Expression

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

the class AntlrProgramBuilder method parsePlusMins.

protected Expression parsePlusMins(AddminExpContext ctx) {
    Expression a = this.parseExpress(ctx.expression(0));
    Expression b = this.parseExpress(ctx.expression(1));
    TerminalNode tn = (TerminalNode) ctx.children.get(1);
    short mode = 0;
    if (ctx.ADD() != null) {
        mode = ArthExpression.PLUS;
    } else if (ctx.MIN() != null) {
        mode = ArthExpression.MIN;
    }
    return new ArthExpression(a, b, mode, this.getBTToken(tn.getSymbol()));
}