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