87 lines
2.5 KiB
Java
87 lines
2.5 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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* Output 输出指令
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*
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* 用法：
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* 1：#(value)
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* 2：#(x = 1, y = 2, x + y)
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* 3：#(seoTitle ?? 'JFinal 极速开发社区')
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*/
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public class Output extends Stat {
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private Expr expr;
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public Output(ExprList exprList, Location location) {
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if (exprList.length() == 0) {
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throw new ParseException("The expression of output directive like #(expression) can not be blank", location);
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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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try {
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Object value = expr.eval(scope);
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if (value instanceof String) {
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String str = (String)value;
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writer.write(str, 0, str.length());
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} else if (value instanceof Number) {
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Class<?> c = value.getClass();
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if (c == Integer.class) {
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writer.write((Integer)value);
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} else if (c == Long.class) {
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writer.write((Long)value);
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} else if (c == Double.class) {
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writer.write((Double)value);
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} else if (c == Float.class) {
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writer.write((Float)value);
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} else if (c == Short.class) {
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writer.write((Short)value);
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} else {
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writer.write(value.toString());
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}
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} else if (value instanceof Boolean) {
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writer.write((Boolean)value);
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} else if (value != null) {
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writer.write(value.toString());
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}
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} catch (TemplateException e) {
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throw e;
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} catch (ParseException e) {
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throw e;
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} catch(Exception e) {
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throw new TemplateException(e.getMessage(), location, e);
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}
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}
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}
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