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  1. JDK
  2. JDK-8173457

JDK 9 ea 152 introduces slight changes in generation of html via javax.xml.transform.Transfomer

    Details

    • Subcomponent:
    • Introduced In Build:
      b150
    • Introduced In Version:
      9
    • CPU:
      generic
    • OS:
      generic

      Description

      FULL PRODUCT VERSION :
      java version "9-ea"
      Java(TM) SE Runtime Environment (build 9-ea+152)
      Java HotSpot(TM) 64-Bit Server VM (build 9-ea+152, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Linux dstathink 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

      A DESCRIPTION OF THE PROBLEM :
      There is a testcase as part of Apache POI which generates HTML using javax.xml.transform.Transfomer. This test-case ran fine up to JDK 9ea-148, but started to fail in JDK9 ea-152 due to a small change in generated blanks as part of the generated HTML text.



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Use the provided test-case to reproduce the problem.

      Note: For some strange reason, when I do some changes to the test-case, e.g. refactor the test into multiple modules, then the error goes away. Very strange and indicates that this might actually be some deeper compiler-error.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      I would expect the generated HTML/XML from javax.xml.transform.Transfomer. to stay the same between Java releases, but it seems the latest JDK 9 build breaks this.
      ACTUAL -
      Previously the contents " " lead to a blank being included in the output, but now it is not generated any more.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------

      import org.junit.Test;
      import org.w3c.dom.Document;
      import org.w3c.dom.Element;

      import javax.xml.parsers.DocumentBuilderFactory;
      import javax.xml.transform.OutputKeys;
      import javax.xml.transform.Transformer;
      import javax.xml.transform.TransformerFactory;
      import javax.xml.transform.dom.DOMSource;
      import javax.xml.transform.stream.StreamResult;
      import java.io.StringWriter;

      import static org.junit.Assert.assertEquals;

      /**
       * Test-Class which reproduces a difference in the text produced by java.xml.transform.Transformer
       * starting with JDK 9 ea-152 (still working in JDK 9 ea-148!)
       *
       * We use a Transformer to create a simple HTML structure and noticed that there is a slight
       * difference in produced text, i.e. a blank that was rendered before is now omitted.
       */
      public class TestJDK9 {
          @Test
          public void testTransformBlank() throws Exception {
              Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();

              Element note = document.createElement( "div" );
              document.appendChild( note );

              note.appendChild(document.createElement("a"));
              note.appendChild(document.createTextNode(" "));
              note.appendChild(document.createElement("span"));

              Transformer transformer = TransformerFactory.newInstance()
                      .newTransformer();
              transformer.setOutputProperty( OutputKeys.INDENT, "yes");
              transformer.setOutputProperty( OutputKeys.METHOD, "html");

              StringWriter stringWriter = new StringWriter();
              transformer.transform(
                      new DOMSource(document),
                      new StreamResult( stringWriter ));

              assertEquals( "Had: " + stringWriter.toString(),
                      "<div>\n" +
                      "<a></a> <span></span>\n" +
                      "</div>\n", stringWriter.toString());
          }
      }

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

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            • Assignee:
              akolarkunnu Abdul Kolarkunnu
              Reporter:
              webbuggrp Webbug Group
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              • Created:
                Updated:
                Resolved: