Html5 database compatibility with GWT 2.5.1

[Rajanish Rajvanshi]

Hello,

I am trying to use database API example, using GWT 2.5.1 and getting this error. Can anyone let me know if this API is still usable and compatible or am I doing something wrong.

Compiling module com.xlnt.ex.db.HelloDatabase
   [ERROR] An internal compiler exception occurred
com.google.gwt.dev.jjs.InternalCompilerException: Unexpected error during visit.
    at com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:109)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:276)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
    at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:116)
    at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:65)
    at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
    at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:116)
    at com.google.gwt.dev.jjs.ast.JDeclarationStatement.traverse(JDeclarationStatement.java:48)
    at com.google.gwt.dev.jjs.ast.JModVisitor$ListContextImmutable.traverse(JModVisitor.java:170)
    at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemoveImmutable(JModVisitor.java:336)
    at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:83)
    at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
    at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:137)
    at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:133)
    at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:82)
    at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
    at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:434)
    at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:403)
    at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
    at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:900)
    at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:625)
    at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:640)
    at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:33)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:278)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:141)
    at com.google.gwt.dev.Compiler.run(Compiler.java:232)
    at com.google.gwt.dev.Compiler.run(Compiler.java:198)
    at com.google.gwt.dev.Compiler$1.run(Compiler.java:170)
    at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:88)
    at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:82)
    at com.google.gwt.dev.Compiler.main(Compiler.java:177)
Caused by: java.lang.IncompatibleClassChangeError: Found interface com.google.gwt.core.ext.typeinfo.JClassType, but class was expected
    at com.google.code.gwt.database.rebind.DataServiceGenerator.generate(DataServiceGenerator.java:71)
    at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)
    at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:657)
    at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:41)
    at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79)
    at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276)
    at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:265)
    at com.google.gwt.dev.DistillerRebindPermutationOracle.getAllPossibleRebindAnswers(DistillerRebindPermutationOracle.java:91)
    at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleGwtCreate(UnifyAst.java:355)
    at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleMagicMethodCall(UnifyAst.java:433)
    at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:237)
    at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:243)
    at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
    at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
    ... 37 more
      [ERROR] at HelloDatabase.java(37): GWT.create(MyDataService.class)
         com.google.gwt.dev.jjs.ast.JMethodCall
      [ERROR] at HelloDatabase.java(37): (MyDataService) GWT.create(MyDataService.class)
         com.google.gwt.dev.jjs.ast.JCastOperation
      [ERROR] at HelloDatabase.java(37): MyDataService dbService = (MyDataService) GWT.create(MyDataService.class)
         com.google.gwt.dev.jjs.ast.JDeclarationStatement
      [ERROR] at HelloDatabase.java(34): {
  MyDataService dbService = (MyDataService) GWT.create(MyDataService.class);
}
         com.google.gwt.dev.jjs.ast.JBlock
      [ERROR] at HelloDatabase.java(34): {
  MyDataService dbService = (MyDataService) GWT.create(MyDataService.class);
}
         com.google.gwt.dev.jjs.ast.JMethodBody
      [ERROR] at HelloDatabase.java(34): private final void $init();

         com.google.gwt.dev.jjs.ast.JMethod