visad/src/main/java/ucar/nc2/iosp/gempak/GempakFileReader.java
public static GempakFileReader getInstance(RandomAccessFile raf, boolean fullCheck) throws IOException {
    GempakFileReader gfr = new GempakFileReader();
    gfr.init(raf, fullCheck);
    return gfr;
  }
public static GempakFileReader getInstance(RandomAccessFile raf, boolean fullCheck) throws IOException {
    GempakFileReader gfr = new GempakFileReader();
    gfr.init(raf, fullCheck);
    return gfr;
  }
Initialize the file, read in all the metadata (ala DM_OPEN)

@param raf       RandomAccessFile to read.
@param fullCheck if true, check entire structure
@return a GempakFileReader
@throws IOException problem reading file