【Java开源代码栏目提醒】:网学会员--在 Java开源代码编辑为广大网友搜集整理了:ForwardGenerator.java绩等信息,祝愿广大网友取得需要的信息,参考学习。
/*
* $Header: /cvsroot/jetty/Jetty3/src/org/apache/jasper/compiler/ForwardGenerator.java,v 1.1 2000/10/09 17:57:41 gregwilkins Exp $
* $Revision: 1.1 $
* $Date: 2000/10/09 17:57:41 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact 3710167@qq.com.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.jasper.compiler;
import java.util.Hashtable;
import java.util.Enumeration;
import org.apache.jasper.JasperException;
import org.apache.jasper.Constants;
/**
* Generator for <jsp:forward>
*
* @author Anil K. Vijendran
*/
public class ForwardGenerator
extends GeneratorBase
implements ServiceMethodPhase
{
String page;
boolean isExpression = false;
Hashtable params;
public ForwardGenerator(Mark start, Hashtable attrs, Hashtable param)
throws JasperException {
if (attrs.size() != 1)
throw new JasperException(Constants.getString("jsp.error.invalid.forward"));
page = (String) attrs.get("page");
if (page == null)
throw new CompileException(start,
Constants.getString("jsp.error.invalid.forward"));
this.params = param;
isExpression = JspUtil.isExpression (page);
}
public void generate(ServletWriter writer, Class phase) {
boolean initial = true;
String sep = "?";
writer.println("if (true) {");
writer.pushIndent();
writer.println("out.clear();");
writer.println("String _jspx_qfStr = \"\";");
if (params.size() > 0) {
Enumeration en = params.keys();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
String []value = (String []) params.get(key);
if (initial == true) {
sep = "?";
initial = false;
} else sep = "&";
if (value.length == 1 && JspUtil.isExpression(value[0]))
writer.println("_jspx_qfStr = _jspx_qfStr + \"" + sep +
key + "=\" + " + JspUtil.getExpr(value[0]) + ";");
else {
if (value.length == 1)
writer.println("_jspx_qfStr = _jspx_qfStr + \"" + sep +
key + "=\" + \"" + value[0] + "\";");
else {
for (int i = 0; i < value.length; i++) {
if (!JspUtil.isExpression(value[i]))
writer.println("_jspx_qfStr = _jspx_qfStr + \"" + sep +
key + "=\" + \"" + value[i] + "\";");
else
writer.println("_jspx_qfStr = _jspx_qfStr + \"" + sep +
key + "=\" +" + JspUtil.getExpr(value[i])+ ";");
if (sep.equals("?")) sep = "&";
}
}
}
}
}
if (!isExpression)
writer.println("pageContext.forward(" +
writer.quoteString(page) + " + _jspx_qfStr);");
else
writer.println("pageContext.forward(" +
JspUtil.getExpr (page) + " + _jspx_qfStr);");
writer.println("return;");
writer.popIndent();
writer.println("}");
}
}
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