我正在尝试使用 Salat-Avro 序列化和反序列化 Scala 案例类。
我可以在内存中很好地序列化和反序列化,但我只能序列化到文件;我还不能反序列化表单文件。
为什么我的 DatumReader 在读取文件时不会像从流中读取一样成功?
[error] (run-main) java.lang.ExceptionInInitializerError
java.lang.ExceptionInInitializerError
at Main.main(salat-avro-example.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
Caused by: java.lang.ClassCastException: org.apache.avro.generic.GenericData$Record cannot be cast to models.Record
at Main$.<init>(salat-avro-example.scala:55)
at Main$.<clinit>(salat-avro-example.scala)
at Main.main(salat-avro-example.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
java.lang.RuntimeException: Nonzero exit code: 1
at scala.sys.package$.error(package.scala:27)
[error] {file:/home/julianpeeters/salat-avro-example/}default-7321ab/compile:run: Nonzero exit code: 1
[error] Total time: 18 s, completed Aug 30, 2012 12:04:01 AM
这是代码:
val obj2 = grater[Record].asObjectFromDataFile(infile)
调用:
lazy val asDatumReader: AvroDatumReader[X] = asGenericDatumReader
lazy val asGenericDatumReader: AvroGenericDatumReader[X] = new AvroGenericDatumReader[X](asAvroSchema)def asObjectFromDataFile(infile: File): X = {
val asDataFileReader: DataFileReader[X] = new DataFileReader[X](infile, asDatumReader)
asDataFileReader.next()
} `
代码也可以在 Github.com 上看到: Salat-Avro-Example.scala和 Salat-Avro.avrograter.scala
我该如何解决?谢谢!