public static GribCollectionType getType ( RandomAccessFile raf ) throws IOException { String magic ; raf . seek ( 0 ) ; magic = raf . readString ( Grib2CollectionWriter . MAGIC_START . getBytes ( CDM . utf8Charset ) . length ) ; switch ( magic ) { case Grib2CollectionWriter . MAGIC_START : return GribCollectionType . GRIB2 ; case Grib1CollectionWriter . MAGIC_START : return GribCollectionType . GRIB1 ; case Grib2PartitionBuilder . MAGIC_START : return GribCollectionType . Partition2 ; case Grib1PartitionBuilder . MAGIC_START : return GribCollectionType . Partition1 ; } return GribCollectionType . none ; }
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