javascript设计模式之解释器模式详解(9)

for (var i = 0, len = pEles.length; i < len; i++) {
                    nowEles = nowEles.concat(context.getNowEles(pEles[i], this.eleName));
                }
                context.setPreEles(nowEles);

var ss;
                for (i = 0, len = this.eles.length; i < len; i++) {
                    ss = this.eles[i].interpret(context);
                }

return ss;
            },
            addEle: function (ele) {
                this.eles.push(ele);
                return true;
            },
            removeEle: function (ele) {
                for (var i = 0, len = this.eles.length; i < len; i++) {
                    if (ele === this.eles[i]) {
                        this.eles.splice(i--, 1);
                    }
                }
                return true;
            }
        };

void function () {
            // "root/a/b/d$"
            var c = new Context('Interpreter.xml');
            var root = new ElementExpression('root');
            var aEle = new ElementExpression('a');
            var bEle = new ElementExpression('b');
            var dEle = new ElementsTerminalExpression('d');

root.addEle(aEle);
            aEle.addEle(bEle);
            bEle.addEle(dEle);

var ss = root.interpret(c);

for (var i = 0, len = ss.length; i < len; i++) {
                console.log('d的值是 = ' + ss[i]);
            }
        }();

void function () {
            // a/b/d$.id$
            var c = new Context('Interpreter.xml');
            var root = new ElementExpression('root');
            var aEle = new ElementExpression('a');
            var bEle = new ElementExpression('b');
            var dEle = new ElementsExpression('d');
            var prop = new PropertysTerminalExpression('id');

root.addEle(aEle);
            aEle.addEle(bEle);
            bEle.addEle(dEle);
            dEle.addEle(prop);

var ss = root.interpret(c);

for (var i = 0, len = ss.length; i < len; i++) {
                console.log('d的属性id的值是 = ' + ss[i]);
            }
        }();

// 解析器