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Diffstat (limited to 'doc/html/Tutor/examples/java/CreateGroupDataset.java')
| -rw-r--r-- | doc/html/Tutor/examples/java/CreateGroupDataset.java | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/doc/html/Tutor/examples/java/CreateGroupDataset.java b/doc/html/Tutor/examples/java/CreateGroupDataset.java new file mode 100644 index 0000000..f0fbeaa --- /dev/null +++ b/doc/html/Tutor/examples/java/CreateGroupDataset.java @@ -0,0 +1,340 @@ +/****************************************************************** + * CreateGroupDataset.java (for HDF5 tutorial lesson 10) + * + * -- Creating a dataset in a particular group + * (a java conversion from h5_crtgrpd.c) + * + ******************************************************************/ + +import ncsa.hdf.hdf5lib.*; +import ncsa.hdf.hdf5lib.exceptions.*; + +public class CreateGroupDataset +{ + public static void main(String []argv) + { + final String FILE = "groups.h5"; + int file_id = -1; // file identifier + int group_id = -1; // group identifier + int dataset_id; + int dataspace_id; + int status = -1; + + long[] dims = new long[2]; + int[][] dset1_data = new int[3][3]; + int[][] dset2_data = new int[2][10]; + int i = -1, j = -1; + + // Initialize the first dataset. + for (i = 0; i < 3; i++) + for (j = 0; j < 3; j++) + dset1_data[i][j] = j + 1; + + // Initialize the second dataset. + for (i = 0; i < 2; i++) + for (j = 0; j < 10; j++) + dset2_data[i][j] = j + 1; + + // Open an existing file. + file_id = H5Fopen_wrap (FILE, HDF5Constants.H5F_ACC_RDWR, + HDF5Constants.H5P_DEFAULT); + + // Create the data space for the first dataset. + dims[0] = 3; + dims[1] = 3; + dataspace_id = H5Screate_simple_wrap (2, dims, null); + + // Create a dataset in group "MyGroup". + dataset_id = + H5Dcreate_wrap (file_id, "/MyGroup/dset1", + H5.J2C (HDF5CDataTypes.JH5T_STD_I32BE), + dataspace_id, HDF5Constants.H5P_DEFAULT); + + // Write the first dataset. + status = H5Dwrite_wrap + (dataset_id, + H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT), + HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL, + HDF5Constants.H5P_DEFAULT, dset1_data); + + // Close the data space for the first dataset. + status = H5Sclose_wrap (dataspace_id); + + // Close the first dataset. + status = H5Dclose_wrap (dataset_id); + + // Open an existing group of the specified file. + group_id = H5Gopen_wrap (file_id, "/MyGroup/Group_A"); + + // Create the data space for the second dataset. + dims[0] = 2; + dims[1] = 10; + dataspace_id = H5Screate_simple_wrap (2, dims, null); + + // Create the second dataset in group "Group_A". + dataset_id = + H5Dcreate_wrap (group_id, "dset2", + H5.J2C (HDF5CDataTypes.JH5T_STD_I32BE), + dataspace_id, HDF5Constants.H5P_DEFAULT); + + // Write the second dataset. + status = H5Dwrite_wrap + (dataset_id, + H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT), + HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL, + HDF5Constants.H5P_DEFAULT, dset2_data); + + // Close the data space for the second dataset. + status = H5Sclose_wrap (dataspace_id); + + // Close the second dataset + status = H5Dclose_wrap (dataset_id); + + // Close the group. + status = H5Gclose_wrap (group_id); + + // Close the file. + status = H5Fclose_wrap (file_id); + } + + + // Help function for opening an existing file + public static int H5Fopen_wrap (String name, int flags, int access_id) + { + int file_id = -1; // file identifier + try + { + // Create a new file using default file properties. + file_id = H5.H5Fopen (name, flags, access_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Fopen_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Fopen_wrap() with other Exception: " + + e.getMessage()); + } + return file_id; + } + + + // Help function for creating a new simple dataspace and opening it + // for access + public static int H5Screate_simple_wrap (int rank, long dims[], + long maxdims[]) + { + int dataspace_id = -1; // dataspace identifier + + try + { + // Create the data space for the dataset. + dataspace_id = H5.H5Screate_simple (rank, dims, maxdims); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Screate_simple_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Screate_simple_wrap() with other Exception: " + + e.getMessage()); + } + return dataspace_id; + } + + + // Help function for creating a dataset + public static int H5Dcreate_wrap (int loc_id, String name, int type_id, + int space_id, int create_plist_id) + { + int dataset_id = -1; // dataset identifier + + try + { + // Create the dataset + dataset_id = H5.H5Dcreate (loc_id, name, type_id, space_id, + create_plist_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Dcreate_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Dcreate_wrap() with other Exception: " + + e.getMessage()); + } + return dataset_id; + } + + + // Help function for writing the dataset + public static int H5Dwrite_wrap (int dataset_id, int mem_type_id, + int mem_space_id, int file_space_id, + int xfer_plist_id, Object buf) + { + int status = -1; + + try + { + // Write the dataset. + status = H5.H5Dwrite (dataset_id, mem_type_id, mem_space_id, + file_space_id, xfer_plist_id, buf); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Dwrite_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Dwrite_wrap() with other exception: " + + e.getMessage()); + } + return status; + } + + + // Help function for terminating access to the data space. + public static int H5Sclose_wrap (int dataspace_id) + { + int status = -1; + + try + { + // Terminate access to the data space. + status = H5.H5Sclose (dataspace_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Sclose_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Sclose_wrap() with other exception: " + + e.getMessage()); + } + return status; + } + + + // Help function for ending access to the dataset and releasing + // resources used by it. + public static int H5Dclose_wrap (int dataset_id) + { + int status = -1; + + try + { + // End access to the dataset and release resources used by it. + status = H5.H5Dclose (dataset_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Dclose_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Dclose_wrap() with other exception: " + + e.getMessage()); + } + return status; + } + + + // Help function for opening a group + public static int H5Gopen_wrap (int loc_id, String name) + { + int group_id = -1; // group identifier + try + { + // Create a group + group_id = H5.H5Gopen (loc_id, name); + + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Gopen_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Gopen_wrap() with other Exception: " + + e.getMessage()); + } + return group_id; + } + + + // Help function for closing the group + public static int H5Gclose_wrap (int group_id) + { + int status = -1; + + try + { + // Close the group + status = H5.H5Gclose (group_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Gclose_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Gclose_wrap() with other exception: " + + e.getMessage()); + } + return status; + } + + + // Help function for terminating access to the file. + public static int H5Fclose_wrap (int file_id) + { + int status = -1; + + try + { + // Terminate access to the file. + status = H5.H5Fclose (file_id); + } + catch (HDF5Exception hdf5e) + { + System.out.println + ("CreateGroupDataset.H5Fclose_wrap() with HDF5Exception: " + + hdf5e.getMessage()); + } + catch (Exception e) + { + System.out.println + ("CreateGroupDataset.H5Fclose_wrap() with other exception: " + + e.getMessage()); + } + return status; + } +} |