XML serialization: UnsupportedOperationException: Not implemented

[mlic...@gmail.com]

Hi

I have this issue occur randomly and wonder how Jackson binds to an XML writer?

Caused by: java.lang.UnsupportedOperationException: Not implemented

at org.codehaus.stax2.ri.Stax2WriterAdapter.writeRaw(Stax2WriterAdapter.java:419) ~[!/:4.2.1]

at org.codehaus.stax2.ri.Stax2WriterAdapter.writeRaw(Stax2WriterAdapter.java:411) ~[!/:4.2.1]

at com.fasterxml.jackson.dataformat.xml.util.DefaultXmlPrettyPrinter$Lf2SpacesIndenter.writeIndentation(DefaultXmlPrettyPrinter.java:532) ~[!/:2.14.3]

at com.fasterxml.jackson.dataformat.xml.util.DefaultXmlPrettyPrinter.writeLeafElement(DefaultXmlPrettyPrinter.java:271) ~[!/:2.14.3]

at com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator.writeString(ToXmlGenerator.java:663) ~[!/:2.14.3]

at com.fasterxml.jackson.databind.ser.std.StringSerializer.serialize(StringSerializer.java:41) ~[!/:2.14.3]

at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:733) ~[!/:2.14.3]

at com.fasterxml.jackson.dataformat.xml.ser.XmlBeanSerializerBase.serializeFields(XmlBeanSerializerBase.java:212) ~[!/:2.14.3]

at com.fasterxml.jackson.dataformat.xml.ser.XmlBeanSerializer.serialize(XmlBeanSerializer.java:129) ~[!/:2.14.3]

at com.fasterxml.jackson.dataformat.xml.ser.XmlSerializerProvider.serializeValue(XmlSerializerProvider.java:108) ~[!/:2.14.3]

at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4624) ~[!/:2.14.3]

at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3869) ~[!/:2.14.3]

[Tatu Saloranta]

On Wed, Oct 11, 2023 at 12:29 AM mlic...@gmail.com <mlic...@gmail.com> wrote:
>
> Hi
> I have this issue occur randomly and wonder how Jackson binds to an XML writer?

By default underlying Stax implementation to use is detected using
Java platform SPI interface.
If you do not include specific implementation it will probably use one
bundled with JDK which is not
as full-featured, reliable or efficient as Woodstox (or Aalto XML).

I would recommend adding dependency to Woodstox:

https://mvnrepository.com/artifact/com.fasterxml.woodstox/woodstox-core

and things will work better.

Otherwise it is possible that pretty-printing fails as you have seen.
Problem is that with Stax implementations that do not implement Stax2
extensions (like one bundled with JDK) it is not possible to use
certain write methods.
This is unfortunate flaw in handling which tries to work around the
missing Stax2 api but cannot handle all cases.

-+ Tatu +-

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[mlic...@gmail.com]

I do have Woodstox JAR loaded as well. Running things in a Karaf container.
Guess my question is more about how to avoid this randomness of service lookup that sometimes Jackson receives a Stax implementation that is not capable of writing XML.

[Tatu Saloranta]

On Wed, Oct 18, 2023 at 1:36 PM mlic...@gmail.com <mlic...@gmail.com> wrote:
>
> I do have Woodstox JAR loaded as well. Running things in a Karaf container.
> Guess my question is more about how to avoid this randomness of service lookup that sometimes Jackson receives a Stax implementation that is not capable of writing XML.

Hmmmh. Yes, that is unfortunate. If so, maybe there is explicit
inclusion of SJSXP (Sun/Oracle stax implementation), or ancient
reference implementation.

But you can (and may need to) construct Jackson `XmlFactory` with
Woodstox XMLInputFactory (WstxInputFactory) and XMLOutputFactory
(WstxOutputFactory).

-+ Tatu +-

> To view this discussion on the web visit https://groups.google.com/d/msgid/jackson-user/21e94482-1cd9-45b8-bf7a-e5cdbeaed693n%40googlegroups.com.