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 * Copyright by The HDF Group.                                               *
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 * and redistribution, is contained in the files COPYING and Copyright.html. *
 * COPYING can be found at the root of the source code distribution tree.    *
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 ****************************************************************************/

package javaExample;

import ncsa.hdf.object.*;     // the common object package
import ncsa.hdf.object.h5.*;  // the HDF5 implementation

/**
 * <p>Title: HDF Object Package (Java) Example</p>
 * <p>Description: this example shows how to create HDF5 groups using the
 * "HDF Object Package (Java)". The example created the group structure:
 * <pre>
 *     "/" (root)
 *         g1
 *             g11
 *             g12
 *         g2
 *             g21
 *             g22
 * </pre>
 * </p>
 *
 * @author Peter X. Cao
 * @version 2.4
 */
public class H5GroupCreate
{
    private static String fname = "H5GroupCreate.h5";

    public static void main( String args[] ) throws Exception
    {
        // retrieve an instance of H5File
        FileFormat fileFormat = FileFormat.getFileFormat(FileFormat.FILE_TYPE_HDF5);

        if (fileFormat == null)
        {
            System.err.println("Cannot find HDF5 FileFormat.");
            return;
        }

        // create a new file with a given file name.
        H5File testFile = (H5File)fileFormat.create(fname);

        if (testFile == null)
        {
            System.err.println("Failed to create file:"+fname);
            return;
        }

        // open the file and retrieve the root group
        testFile.open();
        Group root = (Group)((javax.swing.tree.DefaultMutableTreeNode)testFile.getRootNode()).getUserObject();

        // create groups
        Group g1 = testFile.createGroup("g1", root);
        Group g11 = testFile.createGroup("g11", g1);
        Group g12 = testFile.createGroup("g12", g1);
        Group g2 = testFile.createGroup("g2", root);
        Group g21 = testFile.createGroup("g21", g2);
        Group g22 = testFile.createGroup("g22", g2);

        // close file resource
        testFile.close();
    }
}