66 lines
1.9 KiB
Java
66 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.stat.ast;
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import com.jfinal.template.Env;
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import com.jfinal.template.expr.ast.Assign;
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import com.jfinal.template.expr.ast.Expr;
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import com.jfinal.template.expr.ast.ExprList;
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import com.jfinal.template.io.Writer;
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import com.jfinal.template.stat.Ctrl;
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import com.jfinal.template.stat.Location;
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import com.jfinal.template.stat.ParseException;
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import com.jfinal.template.stat.Scope;
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/**
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* SetGlobal 设置全局变量，全局作用域是指本次请求的整个 template
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*
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* 适用于极少数的在内层作用域中希望直接操作顶层作用域的场景
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*/
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public class SetGlobal extends Stat {
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private Expr expr;
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public SetGlobal(ExprList exprList, Location location) {
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if (exprList.length() == 0) {
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throw new ParseException("The parameter of #setGlobal directive can not be blank", location);
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}
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for (Expr expr : exprList.getExprArray()) {
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if ( !(expr instanceof Assign) ) {
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throw new ParseException("#setGlobal directive only supports assignment expressions", location);
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}
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}
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this.expr = exprList.getActualExpr();
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}
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public void exec(Env env, Scope scope, Writer writer) {
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Ctrl ctrl = scope.getCtrl();
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try {
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ctrl.setGlobalAssignment();
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expr.eval(scope);
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} finally {
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ctrl.setWisdomAssignment();
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}
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}
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}
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