001: /*
002: * The Apache Software License, Version 1.1
003: *
004: * Copyright (c) 1999 The Apache Software Foundation. All rights
005: * reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * 1. Redistributions of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The end-user documentation included with the redistribution, if
020: * any, must include the following acknowlegement:
021: * "This product includes software developed by the
022: * Apache Software Foundation (http://www.apache.org/)."
023: * Alternately, this acknowlegement may appear in the software itself,
024: * if and wherever such third-party acknowlegements normally appear.
025: *
026: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
027: * Foundation" must not be used to endorse or promote products derived
028: * from this software without prior written permission. For written
029: * permission, please contact apache@apache.org.
030: *
031: * 5. Products derived from this software may not be called "Apache"
032: * nor may "Apache" appear in their names without prior written
033: * permission of the Apache Group.
034: *
035: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: *
049: * This software consists of voluntary contributions made by many
050: * individuals on behalf of the Apache Software Foundation. For more
051: * information on the Apache Software Foundation, please see
052: * <http://www.apache.org/>.
053: *
054: */
055:
056: package com.sun.portal.providers.jsp.jasper3.jasper.compiler;
057:
058: import java.util.Hashtable;
059: import java.util.Enumeration;
060:
061: import com.sun.portal.providers.jsp.jasper3.jasper.JasperException;
062: import com.sun.portal.providers.jsp.jasper3.jasper.Constants;
063:
064: /**
065: * Generator for <jsp:forward>
066: *
067: * @author Anil K. Vijendran
068: */
069: public class ForwardGenerator extends GeneratorBase implements
070: ServiceMethodPhase {
071: String page;
072: boolean isExpression = false;
073: Hashtable params;
074:
075: public ForwardGenerator(Mark start, Hashtable attrs, Hashtable param)
076: throws JasperException {
077: if (attrs.size() != 1)
078: throw new JasperException(Constants
079: .getString("jsp.error.invalid.forward"));
080:
081: page = (String) attrs.get("page");
082: if (page == null)
083: throw new CompileException(start, Constants
084: .getString("jsp.error.invalid.forward"));
085:
086: this .params = param;
087: isExpression = JspUtil.isExpression(page);
088: }
089:
090: public void generate(ServletWriter writer, Class phase) {
091: writer.println("if (true) {");
092: writer.pushIndent();
093: writer.println("out.clear();");
094: writer.println("String _jspx_qfStr = \"\";");
095:
096: if (params.size() > 0) {
097: String sep = "?";
098: if (page.indexOf('?') > 0)
099: sep = "&";
100:
101: Enumeration en = params.keys();
102: while (en.hasMoreElements()) {
103: String key = (String) en.nextElement();
104: String[] value = (String[]) params.get(key);
105:
106: for (int i = 0; i < value.length; i++) {
107: if (JspUtil.isExpression(value[i]))
108: writer.println("_jspx_qfStr = _jspx_qfStr + \""
109: + sep + key + "=\" + "
110: + JspUtil.getExpr(value[i]) + ";");
111: else
112: writer.println("_jspx_qfStr = _jspx_qfStr + \""
113: + sep + key + "=\" + \"" + value[i]
114: + "\";");
115: sep = "&";
116: }
117: }
118: }
119: if (!isExpression)
120: writer.println("pageContext.forward("
121: + writer.quoteString(page) + " + _jspx_qfStr);");
122: else
123: writer.println("pageContext.forward("
124: + JspUtil.getExpr(page) + " + _jspx_qfStr);");
125:
126: writer.println("return;");
127: writer.popIndent();
128: writer.println("}");
129: }
130: }
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