Unable to deserialize missing XML tag to null #461
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henrik242
changed the title
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I think this might be Kotlin-specific, so moving. One question: is this with Jackson 2.12(.3) or earlier? 2.12 added a few improvements to null handling, although I suspect this issue may be wrt Delegating-vs-Properties-based creators. |
cowtowncoder
changed the title
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Thanks! This is with 2.12.3. Also, one of the test cases ( |
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Tried on branch 2.16 but could not reproduce, so it is closed. import com.fasterxml.jackson.databind.DeserializationFeature
import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule
import com.fasterxml.jackson.dataformat.xml.XmlFactory
import com.fasterxml.jackson.dataformat.xml.XmlMapper
import com.fasterxml.jackson.module.kotlin.registerKotlinModule
import com.fasterxml.jackson.module.kotlin.test.github.XmlTool.Inner
import com.fasterxml.jackson.module.kotlin.test.github.XmlTool.Outer
import com.fasterxml.jackson.module.kotlin.test.github.XmlTool.Root
import com.fasterxml.jackson.module.kotlin.test.github.XmlTool.parseOuter
import com.fasterxml.jackson.module.kotlin.test.github.XmlTool.parseRoot
import junit.framework.TestCase.assertEquals
import javax.xml.stream.XMLInputFactory
import kotlin.test.Test
object XmlTool {
val xmlIn = XMLInputFactory.newInstance()
val factory = XmlFactory(xmlIn)
val xmlModule = JacksonXmlModule()
val mapper = XmlMapper(factory, xmlModule)
.registerKotlinModule()
.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true) // Doesn't make any difference
@JvmStatic
fun parseRoot(xml: String?): Root = mapper.readValue(xml, Root::class.java)
@JvmStatic
fun parseOuter(xml: String?): Outer = mapper.readValue(xml, Outer::class.java)
data class Inner(val code: String?)
data class Outer(val inner: Inner?)
data class Root(val outer: Outer?)
}
class Github461 {
@Test
fun no_string_argument() {
val xml = "<root>" +
" <outer>" +
" <inner code=\"578\" />" +
" </outer>" +
"</root>"
val product = parseRoot(xml)
assertEquals(Root(Outer(Inner("578"))), product) // SUCCESS
}
@Test
fun no_string_argument2() {
val xml = "<outer>" +
"</outer>"
val product = parseOuter(xml)
assertEquals(Outer(null), product) // SUCCESS in Jackson 2.11.3, but FAIL in 2.12.3
}
@Test
fun no_string_argument3() {
val xml = "<root>" +
" <outer>" +
" </outer>" +
"</root>"
val product = parseRoot(xml)
assertEquals(Root(Outer(Inner(null))), product) // Always FAILS
}
} |
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Related problem from 2.12.3 and onwards: #721 |
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I have a simple parser and data structure (Kotlin):
.. and a test (Java):
The last test fails with the following exception:
What do I need to change to make this test pass?
I have created a test project at https://github.com/henrik242/jackson-xml-problem/tree/no-string-argument
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