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1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   /*
6    * Copyright 2001-2004 The Apache Software Foundation.
7    *
8    * Licensed under the Apache License, Version 2.0 (the "License");
9    * you may not use this file except in compliance with the License.
10   * You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  /*
21   * $Id: Include.java,v 1.8 2007/04/09 21:30:41 joehw Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler;
25  
26  import com.sun.org.apache.xalan.internal.XalanConstants;
27  import com.sun.org.apache.xalan.internal.utils.SecuritySupport;
28  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
29  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
30  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
31  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
32  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
33  import com.sun.org.apache.xml.internal.utils.SystemIDResolver;
34  import java.io.File;
35  import java.io.FileNotFoundException;
36  import java.net.MalformedURLException;
37  import java.net.URL;
38  import java.util.Enumeration;
39  import javax.xml.XMLConstants;
40  import org.xml.sax.InputSource;
41  import org.xml.sax.XMLReader;
42  
43  /**
44   * @author Jacek Ambroziak
45   * @author Morten Jorgensen
46   * @author Erwin Bolwidt <ejb@klomp.org>
47   * @author Gunnlaugur Briem <gthb@dimon.is>
48   */
49  final class Include extends TopLevelElement {
50  
51      private Stylesheet _included = null;
52  
53      public Stylesheet getIncludedStylesheet() {
54          return _included;
55      }
56  
57      public void parseContents(final Parser parser) {
58          XSLTC xsltc = parser.getXSLTC();
59          Stylesheet context = parser.getCurrentStylesheet();
60  
61          String docToLoad = getAttribute("href");
62          try {
63              if (context.checkForLoop(docToLoad)) {
64                  final ErrorMsg msg = new ErrorMsg(ErrorMsg.CIRCULAR_INCLUDE_ERR,
65                                                    docToLoad, this);
66                  parser.reportError(Constants.FATAL, msg);
67                  return;
68              }
69  
70              InputSource input = null;
71              XMLReader reader = null;
72              String currLoadedDoc = context.getSystemId();
73              SourceLoader loader = context.getSourceLoader();
74  
75              // Use SourceLoader if available
76              if (loader != null) {
77                  input = loader.loadSource(docToLoad, currLoadedDoc, xsltc);
78                  if (input != null) {
79                      docToLoad = input.getSystemId();
80                      reader = xsltc.getXMLReader();
81                  } else if (parser.errorsFound()) {
82                      return;
83                  }
84              }
85  
86              // No SourceLoader or not resolved by SourceLoader
87              if (input == null) {
88                  docToLoad = SystemIDResolver.getAbsoluteURI(docToLoad, currLoadedDoc);
89                  String accessError = SecuritySupport.checkAccess(docToLoad,
90                          (String)xsltc.getProperty(XMLConstants.ACCESS_EXTERNAL_STYLESHEET),
91                          XalanConstants.ACCESS_EXTERNAL_ALL);
92  
93                  if (accessError != null) {
94                      final ErrorMsg msg = new ErrorMsg(ErrorMsg.ACCESSING_XSLT_TARGET_ERR,
95                                          SecuritySupport.sanitizePath(docToLoad), accessError,
96                                          this);
97                      parser.reportError(Constants.FATAL, msg);
98                      return;
99                  }
100                 input = new InputSource(docToLoad);
101             }
102 
103             // Return if we could not resolve the URL
104             if (input == null) {
105                 final ErrorMsg msg =
106                     new ErrorMsg(ErrorMsg.FILE_NOT_FOUND_ERR, docToLoad, this);
107                 parser.reportError(Constants.FATAL, msg);
108                 return;
109             }
110 
111             final SyntaxTreeNode root;
112             if (reader != null) {
113                 root = parser.parse(reader,input);
114             }
115             else {
116                 root = parser.parse(input);
117             }
118 
119             if (root == null) return;
120             _included = parser.makeStylesheet(root);
121             if (_included == null) return;
122 
123             _included.setSourceLoader(loader);
124             _included.setSystemId(docToLoad);
125             _included.setParentStylesheet(context);
126             _included.setIncludingStylesheet(context);
127             _included.setTemplateInlining(context.getTemplateInlining());
128 
129             // An included stylesheet gets the same import precedence
130             // as the stylesheet that included it.
131             final int precedence = context.getImportPrecedence();
132             _included.setImportPrecedence(precedence);
133             parser.setCurrentStylesheet(_included);
134             _included.parseContents(parser);
135 
136             final Enumeration elements = _included.elements();
137             final Stylesheet topStylesheet = parser.getTopLevelStylesheet();
138             while (elements.hasMoreElements()) {
139                 final Object element = elements.nextElement();
140                 if (element instanceof TopLevelElement) {
141                     if (element instanceof Variable) {
142                         topStylesheet.addVariable((Variable) element);
143                     }
144                     else if (element instanceof Param) {
145                         topStylesheet.addParam((Param) element);
146                     }
147                     else {
148                         topStylesheet.addElement((TopLevelElement) element);
149                     }
150                 }
151             }
152         }
153         catch (Exception e) {
154             e.printStackTrace();
155         }
156         finally {
157             parser.setCurrentStylesheet(context);
158         }
159     }
160 
161     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
162         return Type.Void;
163     }
164 
165     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
166         // do nothing
167     }
168 }