(Android) java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/xml/stream/XMLInputFactory

[clashcaddie]

I am trying to deserialise some XML and am getting the following exception.

I have these includes:
implementation "com.fasterxml.jackson.module:jackson-module-kotlin:2.13.2"
implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.13.2")
implementation("com.fasterxml.woodstox:woodstox-core:6.2.8")

I can serialise/deserialize json fine, the issue is just with XML.

java.lang.NoSuchMethodError: No static method newFactory(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljavax/xml/stream/XMLInputFactory; in class Ljavax/xml/stream/XMLInputFactory; or its super classes (declaration of 'javax.xml.stream.XMLInputFactory' appears in /data/app/~~uieaA4ZwQHgkIyUGH_LkxA==/com.clashcaddie.clashcaddie-xRbKiEW2_xNYMI-cfwHckQ==/base.apk!classes14.dex) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:115) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:101) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:85) at com.fasterxml.jackson.dataformat.xml.XmlMapper.<init>(XmlMapper.java:127) at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.saveGrids(GridSettingsOverlayViewModel.kt:69) at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.applyGrids(GridSettingsOverlayViewModel.kt:53) at com.clashcaddie.clashcaddie.databinding.ActivityGridSettingsOverlayBindingImpl._internalCallbackOnClick(ActivityGridSettingsOverlayBindingImpl.java:283) at com.clashcaddie.clashcaddie.generated.callback.OnClickListener.onClick(OnClickListener.java:11) at android.view.View.performClick(View.java:7455) at android.view.View.performClickInternal(View.java:7432) at android.view.View.access$3700(View.java:835) at android.view.View$PerformClick.run(View.java:28810) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7842) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

2022-06-22 13:54:26.194 17351-17351/com.clashcaddie.clashcaddie E/AndroidRuntime: FATAL EXCEPTION: main Process: com.clashcaddie.clashcaddie, PID: 17351 java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/xml/stream/XMLInputFactory; at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:115) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:101) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:85) at com.fasterxml.jackson.dataformat.xml.XmlMapper.<init>(XmlMapper.java:127) at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.saveGrids(GridSettingsOverlayViewModel.kt:66) at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.applyGrids(GridSettingsOverlayViewModel.kt:50) at com.clashcaddie.clashcaddie.databinding.ActivityGridSettingsOverlayBindingImpl._internalCallbackOnClick(ActivityGridSettingsOverlayBindingImpl.java:283) at com.clashcaddie.clashcaddie.generated.callback.OnClickListener.onClick(OnClickListener.java:11) at android.view.View.performClick(View.java:7455) at android.view.View.performClickInternal(View.java:7432) at android.view.View.access$3700(View.java:835) at android.view.View$PerformClick.run(View.java:28810) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7842) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) Caused by: java.lang.ClassNotFoundException: Didn't find class "javax.xml.stream.XMLInputFactory" on path: DexPathList[[dex file "/data/data/com.clashcaddie.clashcaddie/code_cache/.overlay/base.apk/classes4.dex", dex file "/data/data/com.clashcaddie.clashcaddie/code_cache/.overlay/base.apk/classes.dex", dex file "/data/data/com.clashcaddie.clashcaddie/code_cache/.overlay/base.apk/classes14.dex", zip file "/data/app/~~NbB0p3D0j-XgvmhaM3JYmg==/com.clashcaddie.clashcaddie-cnHJSvUA99dufgkz2-Gs7g==/base.apk"],nativeLibraryDirectories=[/data/app/~~NbB0p3D0j-XgvmhaM3JYmg==/com.clashcaddie.clashcaddie-cnHJSvUA99dufgkz2-Gs7g==/lib/arm64, /system/lib64, /system_ext/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:218) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312) at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:115)  at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:101)  at com.fasterxml.jackson.dataformat.xml.XmlFactory.<init>(XmlFactory.java:85)  at com.fasterxml.jackson.dataformat.xml.XmlMapper.<init>(XmlMapper.java:127)  at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.saveGrids(GridSettingsOverlayViewModel.kt:66)  at com.clashcaddie.clashcaddie.ui.caddieoverlay.GridSettingsOverlayViewModel.applyGrids(GridSettingsOverlayViewModel.kt:50)  at com.clashcaddie.clashcaddie.databinding.ActivityGridSettingsOverlayBindingImpl._internalCallbackOnClick(ActivityGridSettingsOverlayBindingImpl.java:283)  at com.clashcaddie.clashcaddie.generated.callback.OnClickListener.onClick(OnClickListener.java:11)  at android.view.View.performClick(View.java:7455)  at android.view.View.performClickInternal(View.java:7432)  at android.view.View.access$3700(View.java:835)  at android.view.View$PerformClick.run(View.java:28810)  at android.os.Handler.handleCallback(Handler.java:938)  at android.os.Handler.dispatchMessage(Handler.java:99)  at android.os.Looper.loopOnce(Looper.java:201)  at android.os.Looper.loop(Looper.java:288)  at android.app.ActivityThread.main(ActivityThread.java:7842)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) 

[cowtowncoder]

Perhaps Android SDK does not include JDK Stax API (types in javax.xml.stream)? Or has an incompatible version.

You may be able to work around this by constructing XMLInputFactory (and XMLOutputFactory) directly -- implementations from Woodstox are WstxInputFactory and WstxOutputFactory -- and constructing XmlFactory with those, and then XmlMapper with this XmlFactory.

[clashcaddie]

Unfortunately the types aren't compatible

var inputFactory = WstxInputFactory()
var xmlFactory = XmlFactory(inputFactory)

XmlFactory won't take WstxInputFactory it requires XMLInputFactory

[cowtowncoder]

But WstxInputFactory IS javax.xml.stream.XMLInputFactory, similarly WstxOutputFactory is javax.xml.stream.XMLOutputFactory (in both cases through intermediate XMLInputFactory2 / XMLOutputFactory2 types).

You can see that from

https://github.com/FasterXML/woodstox/

So if IDE shows these as incompatible, there is something wrong with API jars.

[farmisen]

@clashcaddie

After adding implementation 'javax.xml.stream:stax-api:1.0-2' to my dependencies the following works for me:

val xmlFactory = XmlFactory.builder()
                .xmlInputFactory(WstxInputFactory()) 
                .xmlOutputFactory(WstxOutputFactory())
                .build()

[vitorpamplona]

To help clarify this, the default XmlFactory calls a javax.xml.stream.XMLInputFactory.newFactory function that does not exist on Android. Looks like this method from the JavaX Stream API was introduced on Java 11 and hasn't been added to Android yet.

All Android usages of this lib must hardcode their Factories:

XmlMapper.builder(new XmlFactory(new WstxInputFactory(), new WstxOutputFactory()))...

[cowtowncoder]

I don't think it can be in Java 11; Jackson 2.x only requires Java 8 now. I think javax.xml.stream itself was added in JDK 6 and I thought all methods we call would be in JDK 6.

However, Android has always had gnarly issues in arbitrarily leaving out some JDK packages and I remember years ago javax.xml.stream was one such package: was neither included NOR COULD BE INCLUDED since all javax. packages where deny-listed. :-(

Thank you for including the necessary workaround, that should help Android users facing the issue.

[vitorpamplona]

Actually, I misspoke. Android doesn't have any javax.xml.stream.* classes. Generally, people add javax.xml.stream:stax-api:1.0-2 to fix the issue. But the stax-api's XMLInputFactory doesn't have the new newFactory method. It uses the old newInstance API.

Same issue when using xerces:xercesImpl. The implementation of xml-apis:xml-apis doesn't have the new newFactory method

[cowtowncoder]

Ah... that's unfortunate but not surprising.
I would take a PR against 2.14 to use the old "deprecated" method if that helps Android compatibility.

[cowtowncoder]

Hoping that PR #583 resolves this for upcoming 2.15.0