64 lines
1.9 KiB
Java
64 lines
1.9 KiB
Java
/**
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* Copyright (c) 2011-2019, James Zhan 詹波 (jfinal@126.com).
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.jfinal.template;
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import com.jfinal.template.expr.ast.ExprList;
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import com.jfinal.template.stat.ast.Stat;
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/**
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* Directive 供用户继承并扩展自定义指令，具体用法可以参考
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* com.jfinal.template.ext.directive 包下面的例子
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*/
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public abstract class Directive extends Stat {
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/**
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* 传递给指令的表达式列表
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* 1：表达式列表可通过 exprList.eval(scope) 以及 exprList.evalExprList(scope) 进行求值
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* 2:使用赋值表达式可实现参数传递功能
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*
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* <pre>
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* 例如：#render("_hot.html", title="热门新闻", list=newsList)
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* </pre>
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*/
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protected ExprList exprList;
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/**
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* 具有 #end 结束符的指令内部嵌套的所有内容，调用 stat.exec(env, scope, writer)
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* 即可执行指令内部嵌入所有指令与表达式，如果指令没有 #end 结束符，该属性无效
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*/
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protected Stat stat;
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/**
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* 指令被解析时注入指令参数表达式列表，继承类可以通过覆盖此方法对参数长度和参数类型进行校验
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*/
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public void setExprList(ExprList exprList) {
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this.exprList = exprList;
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}
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/**
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* 指令被解析时注入指令 body 内容，仅对于具有 #end 结束符的指令有效
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*/
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public void setStat(Stat stat) {
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this.stat = stat;
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}
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}
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