JspInclude


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *   Free SoftwareFoundation, Inc.
23   *   59 Temple Place, Suite 330
24   *   Boston, MA 02111-1307  USA
25   *
26   * @author Scott Ferguson
27   */
28  
29  package com.caucho.jsp.java;
30  
31  import com.caucho.jsp.JspParseException;
32  import com.caucho.vfs.WriteStream;
33  import com.caucho.xml.QName;
34  
35  import java.io.IOException  ;
36  import java.util.ArrayList  ;
37  
38  /**
39   * Represents a Java scriptlet.
40   */
41  public class JspInclude extends JspNode {
42    private static final QName PAGE = new QName("page");
43    private static final QName FLUSH = new QName("flush");
44    
45    private String   _page;
46    private boolean _flush = false; // jsp/15m4
47    
48    private String   _text;
49    
50    private ArrayList  <JspParam> _params;
51  
52    /**
53     * Adds an attribute.
54     */
55    public void addAttribute(QName name, String   value)
56      throws JspParseException
57    {
58      if (PAGE.equals(name))
59        _page = value;
60      else if (FLUSH.equals(name))
61        _flush = value.equals("true");
62      else
63        throw error(L.l("`{0}' is an invalid attribute in <jsp:include>",
64                        name.getName()));
65    }
66    
67    /**
68     * True if the node has scripting
69     */
70    public boolean hasScripting()
71    {
72      if (_params == null)
73        return false;
74      
75      for (int i = 0; i < _params.size(); i++) {
76        if (_params.get(i).hasScripting())
77      return true;
78      }
79  
80      return false;
81    }
82  
83    /**
84     * Adds text to the scriptlet.
85     */
86    public JspNode addText(String   text)
87    {
88      _text = text;
89  
90      return null;
91    }
92  
93    /**
94     * Adds a parameter.
95     */
96    public void addChild(JspNode node)
97      throws JspParseException
98    {
99      if (node instanceof JspParam) {
100       JspParam param = (JspParam) node;
101 
102       if (_params == null)
103         _params = new ArrayList  <JspParam>();
104 
105       _params.add(param);
106     }
107     else {
108       super.addChild(node);
109     }
110   }
111 
112   /**
113    * Generates the XML text representation for the tag validation.
114    *
115    * @param os write stream to the generated XML.
116    */
117   public void printXml(WriteStream os)
118     throws IOException  
119   {
120     os.print("<jsp:include page=\"" + _page + "\">");
121 
122     os.print("</jsp:include>");
123   }
124 
125   /**
126    * Generates the code for the scriptlet
127    *
128    * @param out the output writer for the generated java.
129    */
130   public void generate(JspJavaWriter out)
131     throws Exception  
132   {
133     boolean hasQuery = false;
134 
135     if (_page == null)
136       throw error(L.l("<jsp:include> expects a `page' attribute.  `page' specifies the path to include."));
137 
138     if (hasRuntimeAttribute(_page)) {
139       out.print("pageContext.include(");
140       out.print(getRuntimeAttribute(_page));
141     }
142     else {
143       String   page = _page;
144 
145       out.print("pageContext.include(");
146       out.print(generateParameterValue(String  .class, _page));
147     }
148 
149     if (_params != null) {
150       out.print(", ");
151       generateIncludeParams(out, _params);
152     }
153 
154     out.print(", " + _flush);
155     
156     out.println(");");
157   }
158 }
159
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