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  1. JDK
  2. JDK-7148925

StAXSource causes exceptions to be thrown with certain wellformed XML instances

    Details

    • Subcomponent:
    • Resolved In Build:
      b06
    • CPU:
      x86
    • OS:
      linux_ubuntu

      Description

      FULL PRODUCT VERSION :
      1.6.0_20
      1.6.0_29
      1.7.0_04_ea


      ADDITIONAL OS VERSION INFORMATION :
      Ubuntu Linux 10.04 - kernel 2.6.0.32
      Mac OS-X, 7.0.2 - Darwin Kernel Version 11.2.0

      A DESCRIPTION OF THE PROBLEM :
      The following well formed XML instances cause XML transformation to throw exceptions when using javax.xml.transform.stax.StAXSource as a source (but not when using StreamSource).

      Causes java.lang.IllegalStateException("StAXSource(XMLStreamReader) with XMLStreamReader not in XMLStreamConstants.START_DOCUMENT or XMLStreamConstants.START_ELEMENT state"):
      <?xml-stylesheet href='show.xsl' type='text/html'?>
      <root/>

      Causes javax.xml.transform.TransformerException("ParseError at [row,col]:[1,105] Message: found: DTD, expected START_ELEMENT or END_ELEMENT"):
      <?xml version='1.0'?>
      <?xml-stylesheet href='show.xsl' type='text/html'?>
      <!DOCTYPE root>
      <root/>

      Causes javax.xml.transform.TransformerException("ParseError at [row,col]:[1,105] Message: found: DTD, expected START_ELEMENT or END_ELEMENT"):
      <?xml version='1.0'?>
      <?xml-stylesheet href='show.xsl' type='text/html'?>
      <!DOCTYPE root [<!ELEMENT greeting (#PCDATA)>]>
      <root/>

      Similar bug reported as Bug ID 6715417, but further details, and more failures are uncovered by the attached unit test.



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Run the attached (self contained) JUnit tests: StaxSourceParsingBug.java
      also available here: https://xml-extractor.googlecode.com/svn/trunk/src/test/java/org/softee/extractor/transform/StaxSourceParsingBug.java

      Unit tests have also been included, that show that the same XML instances that cause execptions when using StAXSource all succeed when using StreamSource.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Attached JUnit tests should all pass
      ACTUAL -
      Attached JUnit tests fails:
      org.softee.extractor.transform.StaxSourceParsingBug.testParseStaxSource3()
      org.softee.extractor.transform.StaxSourceParsingBug.testParseStaxSource5()
      org.softee.extractor.transform.StaxSourceParsingBug.testParseStaxSource7()

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      StaxSourceParsingBug.testParseStaxSource3():
      java.lang.IllegalStateException: StAXSource(XMLStreamReader) with XMLStreamReadernot in XMLStreamConstants.START_DOCUMENT or XMLStreamConstants.START_ELEMENT state
      at javax.xml.transform.stax.StAXSource.<init>(StAXSource.java:155)
      at org.softee.extractor.transform.StaxSourceParsingBug.parseStaxSource(StaxSourceParsingBug.java:134)
      at org.softee.extractor.transform.StaxSourceParsingBug.testParseStaxSource3(StaxSourceParsingBug.java:93)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)


      StaxSourceParsingBug.testParseStaxSource5():
      javax.xml.transform.TransformerException: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,88]
      Message: found: DTD, expected START_ELEMENT or END_ELEMENT
      at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:739)
      at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:340)
      at org.softee.extractor.transform.StaxSourceParsingBug.unityTransform(StaxSourceParsingBug.java:141)
      at org.softee.extractor.transform.StaxSourceParsingBug.parseStaxSource(StaxSourceParsingBug.java:135)
      at org.softee.extractor.transform.StaxSourceParsingBug.testParseStaxSource5(StaxSourceParsingBug.java:108)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,88]
      Message: found: DTD, expected START_ELEMENT or END_ELEMENT
      at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.nextTag(XMLStreamReaderImpl.java:1250)
      at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.bridge(StAXStream2SAX.java:145)
      at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.parse(StAXStream2SAX.java:118)
      at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:678)
      at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:727)
      ... 28 more



      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      package org.softee.extractor.transform;

      import java.io.StringReader;
      import java.io.StringWriter;

      import javax.xml.stream.XMLInputFactory;
      import javax.xml.stream.XMLStreamReader;
      import javax.xml.transform.Result;
      import javax.xml.transform.Source;
      import javax.xml.transform.TransformerFactory;
      import javax.xml.transform.stax.StAXSource;
      import javax.xml.transform.stream.StreamResult;
      import javax.xml.transform.stream.StreamSource;

      import org.junit.BeforeClass;
      import org.junit.Test;

      /**
       * This test was written to reproduce a bug that exists in Java SE, where exceptions are thrown when using a StaxSource
       * to parse certain wellformed XML instances.
       *
       * Bug has been reproduced with the following Java versions:
       * - 1.6.0_29-b11-402-11M3527 (Mac OS X, 10.7.2)
       * - 1.7.0_04-ea-b13 (Mac OS X, 10.7.2)
       *
       * The bug has been previously reported http://bugs.sun.com/bugdatabase/view_bug.do;jsessionid=8315aa2186353a67f7fb0db73f510?bug_id=6715417
       */
      public class StaxSourceParsingBug {
          /** Succeeds StAXSource processing */
          private static final String XML_1 = "<root/>";

          /** Succeeds StAXSource processing */
          private static final String XML_2 = "<!DOCTYPE root [<!ENTITY et 'Come Home'>]><root et='&et;'/>";

          /** Fails StAXSource processing with java.lang.IllegalStateException */
          private static final String XML_3 = "<?xml-stylesheet href='show.xsl' type='text/html'?><root/>";

          /** Succeeds StAXSource processing */
          private static final String XML_4 = "<?xml version='1.0'?><?xml-stylesheet href='show.xsl' type='text/html'?><root/>";

          /** Fails StAXSource processing with javax.xml.transform.TransformerException */
          private static final String XML_5 = "<?xml version='1.0'?><?xml-stylesheet href='show.xsl' type='text/html'?><!DOCTYPE root><root/>";

          /** Succeeds StAXSource processing */
          private static final String XML_6 = "<?xml version='1.0'?><!DOCTYPE root [<!ELEMENT greeting (#PCDATA)>]><root/>";

          /** Fails StAXSource processing with javax.xml.transform.TransformerException */
          private static final String XML_7 = "<?xml version='1.0'?><?xml-stylesheet href='show.xsl' type='text/html'?><!DOCTYPE root [<!ELEMENT greeting (#PCDATA)>]><root/>";

          TransformerFactory tf = TransformerFactory.newInstance();

          @BeforeClass
          public static void beforeClass() {
              //System.getProperties().list(System.out);
              showProperty("java.version");
              showProperty("java.runtime.version");
              showProperty("os.name");
              showProperty("os.version");

          }

          private static void showProperty(String name) {
              System.out.printf("%s = %s%n", name, System.getProperty(name));
          }
          @Test
          public void testParseStreamSource() throws Exception {
              parseStreamSource(XML_1);
              parseStreamSource(XML_2);
              parseStreamSource(XML_3);
              parseStreamSource(XML_4);
              parseStreamSource(XML_5);
              parseStreamSource(XML_6);
              parseStreamSource(XML_7);
          }

          @Test
          public void testParseStaxSource1() throws Exception {
              parseStaxSource(XML_1);
          }

          @Test
          public void testParseStaxSource2() throws Exception {
              parseStaxSource(XML_2);
          }

          /**
           * Fails with:
           * java.lang.IllegalStateException: StAXSource(XMLStreamReader) with XMLStreamReader not in
           * XMLStreamConstants.START_DOCUMENT or XMLStreamConstants.START_ELEMENT state
           */
          @Test
          public void testParseStaxSource3() throws Exception {
              parseStaxSource(XML_3);
          }

          @Test
          public void testParseStaxSource4() throws Exception {
              parseStaxSource(XML_4);
          }

          /**
           * Fails with:
           * javax.xml.transform.TransformerException: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,105]
           * Message: found: DTD, expected START_ELEMENT or END_ELEMENT
           */
          @Test
          public void testParseStaxSource5() throws Exception {
              parseStaxSource(XML_5);
          }

          @Test
          public void testParseStaxSource6() throws Exception {
              parseStaxSource(XML_6);
          }

          /**
           * Fails with:
           * javax.xml.transform.TransformerException: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,105]
           * Message: found: DTD, expected START_ELEMENT or END_ELEMENT
           */
          @Test
          public void testParseStaxSource7() throws Exception {
              parseStaxSource(XML_7);
          }

          private void parseStreamSource(String xml) throws Exception {
              Source source = new StreamSource(new StringReader(xml));
              unityTransform(source, xml);
          }

          private void parseStaxSource(String xml) throws Exception {
              XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
              XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(new StringReader(xml));
              StAXSource source = new StAXSource(xmlStreamReader);
              unityTransform(source, xml);
          }

          private void unityTransform(Source source, String sourceXml) throws Exception{
              StringWriter sw = new StringWriter();
              Result result = new StreamResult(sw);
              tf.newTransformer().transform(source, result);
              System.out.printf("%n%s:%nSource: %s%nResult: %s%n", source.getClass().getSimpleName(), sourceXml, sw);
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Replacing the StAXSource with another Source implementation, such as StreamSource, SAXSource, DOMSource fixes the problem.

      This, however is NOT possible when using frameworks (CXF) that expose a Source of type StAXSource

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              • Assignee:
                joehw Joe Wang
                Reporter:
                webbuggrp Webbug Group
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                  Updated:
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