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the jfinal enjoy plugin for normal java program to use sql management function.
/**
* Copyright (c) 2011-2017, James Zhan 詹波 ([email protected]).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jfinal.template.stat.ast;
import com.jfinal.template.Env;
import com.jfinal.template.TemplateException;
import com.jfinal.template.expr.ast.Expr;
import com.jfinal.template.expr.ast.ExprList;
import com.jfinal.template.io.Writer;
import com.jfinal.template.stat.Location;
import com.jfinal.template.stat.ParseException;
import com.jfinal.template.stat.Scope;
/**
* Output 输出指令
*
* 用法：
* 1：#(value)
* 2：#(x = 1, y = 2, x + y)
* 3：#(seoTitle ?? 'JFinal 极速开发社区')
*/
public class Output extends Stat {
private Expr expr;
public Output(ExprList exprList, Location location) {
if (exprList.length() == 0) {
throw new ParseException("The expression of output directive like #(expression) can not be blank", location);
}
this.expr = exprList.getActualExpr();
}
public void exec(Env env, Scope scope, Writer writer) {
try {
Object value = expr.eval(scope);
if (value instanceof String) {
String str = (String)value;
writer.write(str, 0, str.length());
} else if (value instanceof Number) {
Class c = value.getClass();
if (c == Integer.class) {
writer.write((Integer)value);
} else if (c == Long.class) {
writer.write((Long)value);
} else if (c == Double.class) {
writer.write((Double)value);
} else if (c == Float.class) {
writer.write((Float)value);
} else if (c == Short.class) {
writer.write((Short)value);
} else {
writer.write(value.toString());
}
} else if (value instanceof Boolean) {
writer.write((Boolean)value);
} else if (value != null) {
writer.write(value.toString());
}
} catch(TemplateException e) {
throw e;
} catch(Exception e) {
throw new TemplateException(e.getMessage(), location, e);
}
}
}