JAXPWrapper.java

   1 //
   2 //  JAXPWrapper.java
   3 //  TestXSLT
   4 //
   5 //  Created by Marc Liyanage on Mon Aug 04 2003.
   6 //  Copyright (c) 2003 __MyCompanyName__. All rights reserved.
   7 //
   8
   9 //package ch.entropy.testxslt;
  10
  11 import java.io.*;
  12 import java.util.*;
  13 import java.util.regex.*;
  14 import javax.xml.transform.*;
  15 import javax.xml.transform.stream.*;
  16 import javax.xml.*;
  17 import javax.xml.parsers.*;
  18 import org.xml.sax.*;
  19
  20 /**
  21  * JAXPWrapper is a helper class to make it easier to access JAXP transformers
  22  * from the Obj-C code.
  23  *
  24  * @author    Marc Liyanage
  25  * @version   $Id$
  26  */
  27 public class JAXPWrapper {
  28
  29         StringWriter resultWriter;
  30         Exception transformException;
  31         String errorMessage = "(no errors)";
  32         int errorSource = 0;
  33         int errorLine = 0;
  34
  35         public static final int XSLT_ERROR_SOURCE_XML = 1;
  36         public static final int XSLT_ERROR_SOURCE_XSLT = 2;
  37
  38
  39
  40
  41         public String getResult() {
  42
  43                 return resultWriter.toString();
  44
  45         }
  46
  47         /**
  48         * Does something really useful.
  49          * <p>
  50          * Blah blah {@link AnotherClass} blah blah.
  51          *
  52          * @param arg1    the first parameter
  53          * @param arg2    the second parameter
  54          * @return        <code>true</code> if something,
  55          *                <code>false</code> otherwise.
  56          */
  57         public boolean transform(String processorClassName, String xml, String xslt, String parameters, String baseUri) {
  58
  59                 java.lang.System.setProperty("javax.xml.transform.TransformerFactory", processorClassName);
  60
  61                 System.err.println("java reached: xml: " + xml + " xsl: " + xslt + " param: " + parameters + " baseuri: " + baseUri);
  62
  63                 try {
  64
  65                         TransformerFactory tf = TransformerFactory.newInstance();
  66                         Transformer t = tf.newTransformer(new StreamSource(new StringReader(xslt), baseUri));
  67
  68
  69                         if (parameters.length() > 0) {
  70                                 /*
  71                                  * evil in-band separator tricks...
  72                                  */
  73                                 Pattern pairDelimiter = Pattern.compile("--_-!-_--");
  74                                 Pattern keyValueDelimiter = Pattern.compile("==_=!=_==");
  75
  76                                 String [] pairs = pairDelimiter.split(parameters);
  77
  78                                 for (int i = 0; i < pairs.length; i++) {
  79                                         System.err.println("after1");
  80                                         String [] keyValue = keyValueDelimiter.split(pairs[i]);
  81
  82                                         if (keyValue.length > 0) {
  83                                                 System.err.println("after2");
  84                                                 String key = keyValue[0];
  85                                                 String value;
  86
  87                                                 if (keyValue.length > 1) {
  88                                                         value = keyValue[1];
  89                                                 } else {
  90                                                         value = "";
  91                                                 }
  92
  93                                                 t.setParameter(key, value);
  94                                         }
  95                                 }
  96                         }
  97
  98                         resultWriter = new StringWriter();
  99                         t.transform(new StreamSource(new StringReader(xml)), new StreamResult(resultWriter));
 100
 101                 } catch (TransformerConfigurationException e) {
 102
 103                         errorSource = XSLT_ERROR_SOURCE_XSLT; /* That's the assumption anyway */
 104                         errorMessage = getDeepestException(e).getMessage();
 105                         errorLine = getLineNumber(getDeepestException(e));
 106                         transformException = e;
 107
 108                         return false;
 109
 110                 } catch (TransformerException e) {
 111
 112                         errorSource = XSLT_ERROR_SOURCE_XML; /* That's the assumption anyway */
 113                         errorMessage = getDeepestException(e).getMessage();
 114                         errorLine = getLineNumber(getDeepestException(e));
 115                         transformException = e;
 116                         return false;
 117
 118                 } catch (Exception e) {
 119
 120                         System.err.println("Exception: " + e);
 121                         transformException = e;
 122                         errorMessage = e.getMessage();
 123                         return false;
 124                 }
 125
 126                 return true;
 127         }
 128
 129
 130
 131         protected static Throwable getDeepestException(Throwable t) {
 132
 133                 Throwable next = t;
 134
 135                 while (t.getCause() != null) {
 136                         t = t.getCause();
 137                         System.err.println("found nested throwable: " + t);
 138                 }
 139
 140                 return t;
 141         }
 142
 143         protected static int getLineNumber(Throwable t) {
 144
 145                 if (t instanceof TransformerException) {
 146
 147                         TransformerException te = (TransformerException)t;
 148                         SourceLocator sl = te.getLocator();
 149                         if (sl != null) {
 150                                 return sl.getLineNumber();
 151                         }
 152
 153
 154                 } else if (t instanceof SAXParseException) {
 155                         SAXParseException spe = (SAXParseException)t;
 156                         return spe.getLineNumber();
 157                 }
 158
 159                 return 0;
 160
 161         }
 162
 163
 164
 165         public String getErrorMessage() {
 166                 return errorMessage;
 167         }
 168
 169         public int getErrorLine() {
 170                 return errorLine;
 171         }
 172
 173         public int getErrorSource() {
 174                 return errorSource;
 175         }
 176
 177
 178
 179         /**
 180          * Main method for command-line invocation.
 181          *
 182          * @param argv    the argument String array
 183          */
 184         public static void main (String argv[]) {
 185
 186                 JAXPWrapper ref = new JAXPWrapper();
 187                 System.out.println("ref: " + ref);
 188                 String processorImpl = "com.icl.saxon.TransformerFactoryImpl";
 189
 190                 System.out.println("\nParam Test\n");
 191                 String xml = "<?xml version='1.0'?>\n\n\n\n<root/>";
 192                 String xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:param name='param1' select=\"'wrong1'\"/><xsl:param name='param2' select=\"'wrong2'\"/><xsl:template match='/'>-<xsl:value-of select='$param1'/>--<xsl:value-of select='$param2'/>-</xsl:template></xsl:stylesheet>";
 193                 String parameters = "param1==_=!=_==right1--_-!-_--param2==_=!=_==right2";
 194                 ref.transform(processorImpl, xml, xslt, parameters, null);
 195                 System.out.println(ref.getResult());
 196                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 197
 198                 System.out.println("\nEmpty param test\n");
 199                 xml = "<?xml version='1.0'?>\n\n\n\n<root/>";
 200                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:param name='param1' select=\"'wrong1'\"/><xsl:param name='param2' select=\"'wrong2'\"/><xsl:template match='/'>-<xsl:value-of select='$param1'/>--<xsl:value-of select='$param2'/>-</xsl:template></xsl:stylesheet>";
 201                 parameters = "";
 202                 ref.transform(processorImpl, xml, xslt, parameters, null);
 203                 System.out.println(ref.getResult());
 204                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 205
 206                 System.out.println("\nsystem-property() test\n");
 207                 xml = "<?xml version='1.0'?>\n\n\n<root/>";
 208                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:template match='/'>vendor: <xsl:value-of select=\"system-property('xsl:vendor')\"/></xsl:template></xsl:stylesheet>";
 209                 ref.transform(processorImpl, xml, xslt, parameters, null);
 210                 System.out.println(ref.getResult());
 211                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 212
 213                 System.out.println("\nBroken XML Test\n");
 214                 xml = "<?xml version='1.0'?>\n\n\n<root>\n\n\n</xyz>";
 215                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:template match='/'>match!</xsl:template></xsl:stylesheet>";
 216                 ref.transform(processorImpl, xml, xslt, parameters, null);
 217                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 218
 219                 System.out.println("\nBroken XSLT Test\n");
 220                 xml = "<?xml version='1.0'?>\n<root/>";
 221                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:template match='/'>match!</xsl:template></xsl:xyz>";
 222                 ref.transform(processorImpl, xml, xslt, parameters, null);
 223                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 224
 225                 System.out.println("\nBroken XML and XSLT Test\n");
 226                 xml = "<?xml version='1.0'?>\n<root></xyz>";
 227                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:template match='/'>match!</xsl:template></xsl:xyz>";
 228                 ref.transform(processorImpl, xml, xslt, parameters, null);
 229                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 230
 231                 System.out.println("\nBroken XML and XSLT Test 2\n");
 232                 xml = "<?xml version='1.0'?>\n<root></xyz>";
 233                 xslt = "<?xml version='1.0' encoding='iso-8859-1'?>\n\n<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>\n\n\n<xsl:value-of select='1'/>\n\n\n<xsl:template match='/'>match!</xsl:template>\n\n\n</xsl:stylesheet>";
 234                 ref.transform(processorImpl, xml, xslt, parameters, null);
 235                 System.out.println("source: " + ref.getErrorSource() + " line: " + ref.getErrorLine() + " msg: " + ref.getErrorMessage());
 236
 237
 238
 239         }
 240
 241 }