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package examples.groups;
import ncsa.hdf.hdf5lib.H5;
import ncsa.hdf.hdf5lib.HDF5Constants;
import ncsa.hdf.hdf5lib.structs.H5G_info_t;
import ncsa.hdf.object.FileFormat;
import ncsa.hdf.object.h5.H5File;
import ncsa.hdf.object.h5.H5Group;
public class H5ObjectEx_G_Corder {
private static String FILE = "H5ObjectEx_G_Corder.h5";
private static void CreateGroup() throws Exception {
H5File file = null;
H5Group grp = null;
int group_id = -1;
int gcpl_id = -1;
int status;
H5G_info_t ginfo;
int i;
String name;
try {
// Create a new file using default properties.
file = new H5File(FILE, FileFormat.CREATE);
file.open();
// Create group creation property list and enable link creation order tracking.
gcpl_id = H5.H5Pcreate (HDF5Constants.H5P_GROUP_CREATE);
status = H5.H5Pset_link_creation_order(gcpl_id, HDF5Constants.H5P_CRT_ORDER_TRACKED + HDF5Constants.H5P_CRT_ORDER_INDEXED);
// Create primary group using the property list.
if (status >= 0) {
grp = (H5Group) file.createGroup("index_group", null, HDF5Constants.H5P_DEFAULT, gcpl_id);
group_id = grp.open();
}
try {
/*
* Create subgroups in the primary group. These will be tracked
* by creation order. Note that these groups do not have to have
* the creation order tracking property set.
*/
file.createGroup("H", grp);
file.createGroup("D", grp);
file.createGroup("F", grp);
file.createGroup("5", grp);
// Get group info.
ginfo = H5.H5Gget_info(group_id);
//Traverse links in the primary group using alphabetical indices (H5_INDEX_NAME).
System.out.println("Traversing group using alphabetical indices:");
for (i = 0; i < ginfo.nlinks; i++) {
//Retrieve the name of the ith link in a group
name = H5.H5Lget_name_by_idx(group_id, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_INC, i, HDF5Constants.H5P_DEFAULT);
System.out.println("Index " + i + ": " + name);
}
//Traverse links in the primary group by creation order (H5_INDEX_CRT_ORDER).
System.out.println("Traversing group using creation order indices:");
for (i = 0; i < ginfo.nlinks; i++) {
//Retrieve the name of the ith link in a group
name = H5.H5Lget_name_by_idx(group_id, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC, i, HDF5Constants.H5P_DEFAULT);
System.out.println("Index " + i + ": " + name);
}
}
catch (Exception e) {
e.printStackTrace();
}
}
catch (Exception e) {
e.printStackTrace();
}
finally {
// Close and release resources.
// Group property lists closed during createGroup
if (group_id >= 0)
grp.close (group_id);
file.close();
}
}
public static void main(String[] args) {
try {
H5ObjectEx_G_Corder.CreateGroup();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
}
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