[jira] [Created] (XMLSCHEMA-54) Circularity not handled in schema serialization

["Guillaume (JIRA)" <ji...@apache.org>]

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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