I am unable to read HDF5 file using Java HDF5 interface which is written
using C library.
The dataset i am trying to read is a compund type containing
H5T_NATIVE_ULONG, varray_type = H5Tvlen_create (H5T_NATIVE_CHAR) fields.
I am using following code to read it using java api.
FileFormat fileFormat = FileFormat.getFileFormat(FileFormat.FILE_TYPE_HDF5);
// open the file with read and write access
FileFormat testFile = fileFormat.open(fname, FileFormat.READ);
// open the file and retrieve the file structure
testFile.open();
Group root = (Group)((javax.swing.tree.DefaultMutableTreeNode)testFile.
getRootNode()).getUserObject();
for(int i=0; i<root.getMemberList().size(); i++)
{
if(root.getMemberList().get(i).getName().equals("AAPL__records"))
{
Dataset dataset = (Dataset)root.getMemberList().get(i);
java.util.List<Object> dataRead = (java.util.List<Object>)dataset.read();
long[] sid = (long[]) dataRead.get(0);
String[] rec = (String[]) dataRead.get(1);
System.out.println( sid[0]);
System.out.println( rec[0]);
}
}
Its working. But As you can see variable length array is returned as string.
I had to trim and tokenize to use it.
Why it is giving string where it is actually a byte array? Is there a way I
can get it as byte array?