[XALANJ-2614] Serializer 2.7.2 / Xalan 2.7.2 - Bug using Mime-Encoding 'ISO-8859-1'

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.7.2
• Fix Version/s: The Latest Development Code
• Component/s: Serialization
• Security Level: No security risk; visible to anyone (Ordinary problems in Xalan projects. Anybody can view the issue.)
• Environment: Windows 10, Linux ; Java 9, Java 10
• Assignee: Joseph Kessselman
• Reporter: Jens Annighöfer
• Created: 25/Apr/18 09:18
• Updated: 28/Mar/24 00:30
• Resolved: 28/Mar/24 00:30

Description

We found a problem using Xalan / Serializer with Java 9 and 10 when transforming an XML document with a styleheet containing an output-encoding.

Simple input

<?xml version="1.0" encoding="UTF-8"?>
<Message>
  <Value>This is a test input.</Value>
</Message>

Simple stylesheet containing an output-encoding

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
    <xsl:output method="text" indent="no" encoding="ISO-8859-1"/>

    <xsl:template match="/">
        <xsl:text>Tramsformed text: </xsl:text>
        <xsl:value-of select="//Message/Value"/>
    </xsl:template>
</xsl:stylesheet>

Simple transformation code

    @Test
    public void test2() throws Exception {
        final InputStream is1 = Java9Test.class.getClassLoader().getResourceAsStream("test/Input.xml");
        assertNotNull(is1);
        final Document input = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(is1);
        assertNotNull(input);

        final InputStream is2 = Java9Test.class.getClassLoader().getResourceAsStream("test/Transform.xsl");
        assertNotNull(is2);

        final OutputStream os = new FileOutputStream("Output-" + System.getProperty("java.version") + ".txt", false);

        StreamSource xsl = new StreamSource(is2);
        Transformer t = TransformerFactory.newInstance().newTransformer(xsl);
        DOMSource src = new DOMSource(input);

        t.transform(src, new StreamResult(os));
    }

Using Java 7 or Java 8 the result is correct: Tramsformed text: This is a test input.. Using Java 9 or Java 10 the result is not correct:

Tramsformed text: This is a test input.

indicating an invalid or unknown encoding.

In Java 7 or Java 8 org.apache.xml.serializer.Encodings.getEncodingInfo("ISO-8859-1") returns "ISO8859_1" which is a valid Java encoding name. In Java 9 oder Java 10 the method returns "8859-1" which is not a valid name.

The problem is caused by a change to the method keys() in the java.util.Properties class. This method returns die entries of the Encodings.properties in a different order since Java 9.