90 lines
2.6 KiB
Java
90 lines
2.6 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.TemplateException;
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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.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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* Case
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*/
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public class Case extends Stat implements CaseSetter {
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private Expr[] exprArray;
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private Stat stat;
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private Case nextCase;
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public Case(ExprList exprList, StatList statList, Location location) {
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if (exprList.length() == 0) {
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throw new ParseException("The parameter of #case directive can not be blank", location);
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}
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this.exprArray = exprList.getExprArray();
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this.stat = statList.getActualStat();
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}
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public void setNextCase(Case nextCase) {
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this.nextCase = nextCase;
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}
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public void exec(Env env, Scope scope, Writer writer) {
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throw new TemplateException("#case 指令的 exec 不能被调用", location);
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}
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boolean execIfMatch(Object switchValue, Env env, Scope scope, Writer writer) {
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if (exprArray.length == 1) {
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Object value = exprArray[0].eval(scope);
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// 照顾 null == null 以及数值比较小的整型数据比较
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if (value == switchValue) {
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stat.exec(env, scope, writer);
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return true;
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}
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if (value != null && value.equals(switchValue)) {
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stat.exec(env, scope, writer);
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return true;
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}
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} else {
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for (Expr expr : exprArray) {
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Object value = expr.eval(scope);
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// 照顾 null == null 以及数值比较小的整型数据比较
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if (value == switchValue) {
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stat.exec(env, scope, writer);
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return true;
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}
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if (value != null && value.equals(switchValue)) {
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stat.exec(env, scope, writer);
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return true;
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}
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}
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}
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return nextCase != null ? nextCase.execIfMatch(switchValue, env, scope, writer) : false;
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}
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}
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