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/************************************************************
This example shows how to create intermediate groups with
a single call to H5Gcreate.
This file is intended for use with HDF5 Library version 1.8
************************************************************/
package examples.groups;
import java.util.ArrayList;
import ncsa.hdf.hdf5lib.H5;
import ncsa.hdf.hdf5lib.HDF5Constants;
import ncsa.hdf.hdf5lib.callbacks.H5O_iterate_cb;
import ncsa.hdf.hdf5lib.callbacks.H5O_iterate_t;
import ncsa.hdf.hdf5lib.structs.H5O_info_t;
import ncsa.hdf.object.FileFormat;
import ncsa.hdf.object.h5.H5File;
public class H5ObjectEx_G_Intermediate {
private static String FILE = "H5ObjectEx_G_Intermediate.h5";
private void CreateGroup() throws Exception {
H5File file = null;
int file_id = -1;
int lcpl_id = -1;
try {
// Create a new file_id using the default properties.
file = new H5File(FILE, FileFormat.CREATE);
file_id = file.open();
//Create group_id creation property list and set it to allow creation of intermediate group_ids.
lcpl_id = H5.H5Pcreate (HDF5Constants.H5P_LINK_CREATE);
H5.H5Pset_create_intermediate_group(lcpl_id, true);
/*
* Create the group_id /G1/G2/G3. Note that /G1 and /G1/G2 do not
* exist yet. This call would cause an error if we did not use the
* previously created property list.
*/
file.createGroup("/G1/G2/G3", null, lcpl_id);
//Print all the objects in the file_ids to show that intermediate group_ids have been created.
System.out.println("Objects in the file_id:");
//H5O_iterate_t iter_data = null;
H5O_iterate_t iter_data = new H5O_iter_data();
H5O_iterate_cb iter_cb = new H5O_iter_callback();
H5.H5Ovisit(file_id, HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_NATIVE, iter_cb, iter_data);
}
catch (Exception e) {
e.printStackTrace();
}
finally{
//Close and release resources.
if (lcpl_id >= 0)
H5.H5Pclose (lcpl_id);
file.close();
}
}
public static void main(String[] args) {
try {
(new H5ObjectEx_G_Intermediate()).CreateGroup();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
private class idata {
public String link_name = null;
public int link_type = -1;
idata(String name, int type) {
this.link_name = name;
this.link_type = type;
}
}
private class H5O_iter_data implements H5O_iterate_t {
public ArrayList<idata> iterdata = new ArrayList<idata>();
}
private class H5O_iter_callback implements H5O_iterate_cb {
public int callback(int group, String name, H5O_info_t info, H5O_iterate_t op_data) {
idata id = new idata(name, info.type);
((H5O_iter_data)op_data).iterdata.add(id);
System.out.print("/"); /* Print root group in object path */
//Check if the current object is the root group, and if not print the full path name and type.
if (name.charAt(0) == '.') /* Root group, do not print '.' */
System.out.println(" (Group)");
else if(info.type == HDF5Constants.H5O_TYPE_GROUP )
System.out.println(name + " (Group)" );
else if(info.type == HDF5Constants.H5O_TYPE_DATASET)
System.out.println(name + " (Dataset)");
else if (info.type == HDF5Constants.H5O_TYPE_NAMED_DATATYPE )
System.out.println(name + " (Datatype)");
else
System.out.println(name + " (Unknown)");
return 0;
}
}
}
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