@farris/expression-engine-vue/lib/expression-engine/expression_engine.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ExpressionEngine = void 0;
const index_1 = require("../context/index");
const index_2 = require("../expression/index");
const abstract_expression_engine_1 = require("./abstract_expression_engine");
class ExpressionEngine extends abstract_expression_engine_1.AbstractExpressionEngine {
    constructor(context) {
        super(context);
    }
    /**
     * 计算表达式
     * @param expr 表达式
     * @returns
     */
    eval(expr) {
        const expression = new index_2.Expression(expr);
        return expression.eval(this.getContext());
    }
    /**
     * 获取表达式上下文
     * @returns
     */
    getContext() {
        if (!this.context) {
            this.context = new index_1.ExpressionContext();
        }
        return this.context;
    }
    /**
     * 添加自定义方法
     * @param name 方法名
     * @param func 方法体
     */
    addFun(name, func) {
        if (name && typeof func === 'function') {
            this.getContext().set(name, func);
        }
    }
}
exports.ExpressionEngine = ExpressionEngine;