[svn-r3562] Add to tutorial
Purpose:
[is this a bug fix? feature? ...]
Description:
[describe the bug, or describe the new feature, etc]
Solution:
[details about the changes, algorithm, etc...]
[Please as detail as you can since your own explanation is
better than others guessing it from the code.]
Platforms tested:
[machines you have tested the changed version. This is absolute
important. Test it out on at least two or three different platforms
such as Big-endian-32bit (SUN/IRIX), little-endian-32(LINUX) and
64-bit (IRIX64/UNICOS/DEC-ALPHA) would be good.]
This commit is contained in:
Barbara Jones
340
doc/html/Tutor/examples/java/CreateGroupDataset.java
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340
doc/html/Tutor/examples/java/CreateGroupDataset.java
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/******************************************************************
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* CreateGroupDataset.java (for HDF5 tutorial lesson 10)
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*
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* -- Creating a dataset in a particular group
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* (a java conversion from h5_crtgrpd.c)
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*
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******************************************************************/
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import ncsa.hdf.hdf5lib.*;
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import ncsa.hdf.hdf5lib.exceptions.*;
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public class CreateGroupDataset
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{
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public static void main(String []argv)
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{
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final String FILE = "groups.h5";
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int file_id = -1; // file identifier
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int group_id = -1; // group identifier
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int dataset_id;
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int dataspace_id;
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int status = -1;
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long[] dims = new long[2];
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int[][] dset1_data = new int[3][3];
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int[][] dset2_data = new int[2][10];
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int i = -1, j = -1;
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// Initialize the first dataset.
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for (i = 0; i < 3; i++)
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for (j = 0; j < 3; j++)
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dset1_data[i][j] = j + 1;
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// Initialize the second dataset.
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for (i = 0; i < 2; i++)
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for (j = 0; j < 10; j++)
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dset2_data[i][j] = j + 1;
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// Open an existing file.
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file_id = H5Fopen_wrap (FILE, HDF5Constants.H5F_ACC_RDWR,
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HDF5Constants.H5P_DEFAULT);
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// Create the data space for the first dataset.
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dims[0] = 3;
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dims[1] = 3;
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dataspace_id = H5Screate_simple_wrap (2, dims, null);
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// Create a dataset in group "MyGroup".
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dataset_id =
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H5Dcreate_wrap (file_id, "/MyGroup/dset1",
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H5.J2C (HDF5CDataTypes.JH5T_STD_I32BE),
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dataspace_id, HDF5Constants.H5P_DEFAULT);
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// Write the first dataset.
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status = H5Dwrite_wrap
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(dataset_id,
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H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT),
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HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL,
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HDF5Constants.H5P_DEFAULT, dset1_data);
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// Close the data space for the first dataset.
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status = H5Sclose_wrap (dataspace_id);
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// Close the first dataset.
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status = H5Dclose_wrap (dataset_id);
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// Open an existing group of the specified file.
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group_id = H5Gopen_wrap (file_id, "/MyGroup/Group_A");
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// Create the data space for the second dataset.
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dims[0] = 2;
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dims[1] = 10;
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dataspace_id = H5Screate_simple_wrap (2, dims, null);
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// Create the second dataset in group "Group_A".
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dataset_id =
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H5Dcreate_wrap (group_id, "dset2",
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H5.J2C (HDF5CDataTypes.JH5T_STD_I32BE),
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dataspace_id, HDF5Constants.H5P_DEFAULT);
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// Write the second dataset.
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status = H5Dwrite_wrap
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(dataset_id,
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H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT),
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HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL,
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HDF5Constants.H5P_DEFAULT, dset2_data);
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// Close the data space for the second dataset.
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status = H5Sclose_wrap (dataspace_id);
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// Close the second dataset
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status = H5Dclose_wrap (dataset_id);
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// Close the group.
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status = H5Gclose_wrap (group_id);
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// Close the file.
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status = H5Fclose_wrap (file_id);
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}
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// Help function for opening an existing file
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public static int H5Fopen_wrap (String name, int flags, int access_id)
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{
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int file_id = -1; // file identifier
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try
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{
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// Create a new file using default file properties.
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file_id = H5.H5Fopen (name, flags, access_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Fopen_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Fopen_wrap() with other Exception: "
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+ e.getMessage());
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}
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return file_id;
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}
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// Help function for creating a new simple dataspace and opening it
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// for access
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public static int H5Screate_simple_wrap (int rank, long dims[],
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long maxdims[])
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{
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int dataspace_id = -1; // dataspace identifier
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try
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{
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// Create the data space for the dataset.
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dataspace_id = H5.H5Screate_simple (rank, dims, maxdims);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Screate_simple_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Screate_simple_wrap() with other Exception: "
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+ e.getMessage());
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}
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return dataspace_id;
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}
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// Help function for creating a dataset
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public static int H5Dcreate_wrap (int loc_id, String name, int type_id,
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int space_id, int create_plist_id)
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{
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int dataset_id = -1; // dataset identifier
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try
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{
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// Create the dataset
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dataset_id = H5.H5Dcreate (loc_id, name, type_id, space_id,
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create_plist_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Dcreate_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Dcreate_wrap() with other Exception: "
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+ e.getMessage());
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}
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return dataset_id;
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}
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// Help function for writing the dataset
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public static int H5Dwrite_wrap (int dataset_id, int mem_type_id,
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int mem_space_id, int file_space_id,
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int xfer_plist_id, Object buf)
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{
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int status = -1;
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try
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{
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// Write the dataset.
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status = H5.H5Dwrite (dataset_id, mem_type_id, mem_space_id,
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file_space_id, xfer_plist_id, buf);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Dwrite_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Dwrite_wrap() with other exception: "
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+ e.getMessage());
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}
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return status;
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}
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// Help function for terminating access to the data space.
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public static int H5Sclose_wrap (int dataspace_id)
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{
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int status = -1;
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try
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{
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// Terminate access to the data space.
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status = H5.H5Sclose (dataspace_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Sclose_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Sclose_wrap() with other exception: "
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+ e.getMessage());
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}
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return status;
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}
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// Help function for ending access to the dataset and releasing
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// resources used by it.
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public static int H5Dclose_wrap (int dataset_id)
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{
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int status = -1;
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try
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{
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// End access to the dataset and release resources used by it.
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status = H5.H5Dclose (dataset_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Dclose_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Dclose_wrap() with other exception: "
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+ e.getMessage());
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}
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return status;
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}
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// Help function for opening a group
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public static int H5Gopen_wrap (int loc_id, String name)
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{
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int group_id = -1; // group identifier
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try
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{
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// Create a group
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group_id = H5.H5Gopen (loc_id, name);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Gopen_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Gopen_wrap() with other Exception: "
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+ e.getMessage());
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}
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return group_id;
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}
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// Help function for closing the group
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public static int H5Gclose_wrap (int group_id)
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{
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int status = -1;
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try
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{
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// Close the group
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status = H5.H5Gclose (group_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Gclose_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Gclose_wrap() with other exception: "
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+ e.getMessage());
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}
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return status;
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}
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// Help function for terminating access to the file.
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public static int H5Fclose_wrap (int file_id)
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{
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int status = -1;
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try
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{
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// Terminate access to the file.
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status = H5.H5Fclose (file_id);
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}
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catch (HDF5Exception hdf5e)
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{
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System.out.println
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("CreateGroupDataset.H5Fclose_wrap() with HDF5Exception: "
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+ hdf5e.getMessage());
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}
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catch (Exception e)
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{
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System.out.println
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("CreateGroupDataset.H5Fclose_wrap() with other exception: "
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+ e.getMessage());
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}
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return status;
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}
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}
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