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List:       webservices-general
Subject:    [jira] [Created] (XMLSCHEMA-54) Circularity not handled in schema serialization
From:       "Guillaume (JIRA)" <jira () apache ! org>
Date:       2018-08-22 16:49:00
Message-ID: JIRA.13180515.1534956487000.136375.1534956540105 () Atlassian ! JIRA
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Guillaume created XMLSCHEMA-54:
----------------------------------

             Summary: Circularity not handled in schema serialization
                 Key: XMLSCHEMA-54
                 URL: https://issues.apache.org/jira/browse/XMLSCHEMA-54
             Project: XmlSchema
          Issue Type: Bug
    Affects Versions: 2.2.3
         Environment: Windows Server 2016

IntelliJ IDEA 2018
            Reporter: Guillaume


Hello,

I am using version 2.2.3.

I am creating a Xml Schema using the classes defined in xmlschema-core, and expecting \
to write out the schema to a file.

  
{code:java}
XmlSchemaCollection schemaCollection;
try {
    schemaCollection = schemaGenerator.generateSchema();
    logger.fine("Schema created");
} catch (Exception e) {
    e.printStackTrace();
    return;
}

XmlSchema schema = schemaCollection.getXmlSchemas()[0];
try {
    schema.write(System.out);
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
}
{code}
  

But I get the exception :

  
{code:java}
Exception in thread "main" java.lang.StackOverflowError
at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeElement(XmlSchemaSerializer.java:1031)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeSequence(XmlSchemaSerializer.java:1749)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeComplexType(XmlSchemaSerializer.java:918)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeElement(XmlSchemaSerializer.java:1086)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeSequence(XmlSchemaSerializer.java:1749)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeComplexType(XmlSchemaSerializer.java:918)
 at org.apache.ws.commons.schema.XmlSchemaSerializer.serializeElement(XmlSchemaSerializer.java:1086)
 at 
{code}
and so on. It happens at the line :

  

  
{code:java}
XmlSchema schema = schemaCollection.getXmlSchemas()[0];{code}
  

I used the debugger and from what I see, the XmlSchemaSerializer does not handle the \
circularity. It just do recursively without discriminating whether or not the \
XmlSchemaType is being serialized already in an upper scope. Note that all my \
ComplexType instances are at the top level :

  
{code:java}
XmlSchemaComplexType xsType = new XmlSchemaComplexType(schema, true);
{code}
but in the code it doesn't seem to me that  _XmlSchemaType.isTopLevel()_  is used \
anywhere during the serialization, which is counter intuitive.

  

Am I doing it wrong ? I really think that this is a bug though.

  



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