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Can I call the Java extension function from Xalan on Android?

docx4j uses Xalan to convert docx to HTML and relies heavily on the Java Xalan extensions to do the job.

But Xalan extensions do not work for me on Android (working with 4.0.3). LogCat says:

05-14 15:38:02.840: I/dalvikvm(7249): DexOpt: illegal method access (call Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; from Lorg/apache/xalan/extensions/ExtensionHandlerJavaPackage;) 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.extensions.ExtensionHandler.getClassForName, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve static method 21489: Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x71 at 0x0096 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.transformer.TransformerImpl.getDebug, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve virtual method 23717: Lorg/apache/xalan/transformer/TransformerImpl;.getDebug ()Z 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x74 at 0x0133 05-14 15:38:02.840: I/dalvikvm(7249): DexOpt: illegal method access (call Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; from Lorg/apache/xalan/extensions/ExtensionHandlerJavaPackage;) 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.extensions.ExtensionHandler.getClassForName, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve static method 21489: Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x71 at 0x0189 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.transformer.TransformerImpl.getDebug, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve virtual method 23717: Lorg/apache/xalan/transformer/TransformerImpl;.getDebug ()Z 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x74 at 0x028e 05-14 15:38:02.840: I/dalvikvm(7249): DexOpt: illegal method access (call Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; from Lorg/apache/xalan/extensions/ExtensionHandlerJavaPackage;) 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.extensions.ExtensionHandler.getClassForName, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.isElementAvailable 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve static method 21489: Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x71 at 0x0022 05-14 15:38:02.840: I/dalvikvm(7249): DexOpt: illegal method access (call Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; from Lorg/apache/xalan/extensions/ExtensionHandlerJavaPackage;) 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.extensions.ExtensionHandler.getClassForName, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.isFunctionAvailable 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve static method 21489: Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x71 at 0x0021 05-14 15:38:02.840: I/dalvikvm(7249): DexOpt: illegal method access (call Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; from Lorg/apache/xalan/extensions/ExtensionHandlerJavaPackage;) 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.extensions.ExtensionHandler.getClassForName, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.processElement 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve static method 21489: Lorg/apache/xalan/extensions/ExtensionHandler;.getClassForName (Ljava/lang/String;)Ljava/lang/Class; 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x71 at 0x004c 05-14 15:38:02.840: I/dalvikvm(7249): Could not find method org.apache.xalan.transformer.TransformerImpl.getDebug, referenced from method org.apache.xalan.extensions.ExtensionHandlerJavaPackage.processElement 05-14 15:38:02.840: W/dalvikvm(7249): VFY: unable to resolve virtual method 23717: Lorg/apache/xalan/transformer/TransformerImpl;.getDebug ()Z 05-14 15:38:02.840: D/dalvikvm(7249): VFY: replacing opcode 0x74 at 0x0091 05-14 15:38:02.860: D/AndroidRuntime(7249): Shutting down VM 05-14 15:38:02.860: W/dalvikvm(7249): threadid=1: thread exiting with uncaught exception (group=0x40a531f8) 05-14 15:38:02.860: E/AndroidRuntime(7249): FATAL EXCEPTION: main 05-14 15:38:02.860: E/AndroidRuntime(7249): java.lang.IllegalAccessError: tried to access method org.apache.xalan.extensions.ExtensionHandler.getClassForName:(Ljava/lang/String;Ljava/util/Vector;Ljava/lang/Object;Lorg/apache/xalan/extensions/ExpressionContext;)Ljava/lang/Object; from class org.apache.xalan.extensions.ExtensionHandlerJavaPackage 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction(ExtensionHandlerJavaPackage.java:315) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction(ExtensionHandlerJavaPackage.java:440) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.extensions.ExtensionsTable.extFunction(ExtensionsTable.java:222) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.extFunction(TransformerImpl.java:417) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xpath.functions.FuncExtFunction.execute(FuncExtFunction.java:208) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xpath.XPath.execute(XPath.java:337) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:274) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:245) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:370) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:175) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2223) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2096) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1228) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:614) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1145) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1123) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.docx4j.XmlUtils.transform(XmlUtils.java:841) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.docx4j.XmlUtils.transform(XmlUtils.java:734) 05-14 15:38:02.860: E/AndroidRuntime(7249): at org.docx4j.convert.out.html.HtmlExporterNG2.html(HtmlExporterNG2.java:269) 05-14 15:38:02.860: E/AndroidRuntime(7249): at com.example.HelloAndroid.HelloAndroid.onCreate(HelloAndroid.java:58) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.Activity.performCreate(Activity.java:4465) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.ActivityThread.access$600(ActivityThread.java:123) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.os.Handler.dispatchMessage(Handler.java:99) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.os.Looper.loop(Looper.java:137) 05-14 15:38:02.860: E/AndroidRuntime(7249): at android.app.ActivityThread.main(ActivityThread.java:4424) 05-14 15:38:02.860: E/AndroidRuntime(7249): at java.lang.reflect.Method.invokeNative(Native Method) 05-14 15:38:02.860: E/AndroidRuntime(7249): at java.lang.reflect.Method.invoke(Method.java:511) 05-14 15:38:02.860: E/AndroidRuntime(7249): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 05-14 15:38:02.860: E/AndroidRuntime(7249): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 05-14 15:38:02.860: E/AndroidRuntime(7249): at dalvik.system.NativeStart.main(Native Method)

Any thoughts on what the problem is exactly, and workarounds?

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1 answer

Android includes its own copy of some Apache XML libraries. If you want to include your own versions in your application, it is best to repackage it using here .

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Source: https://habr.com/ru/post/915641/

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