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Diffstat (limited to 'HDF5Examples/JAVA/H5G/H5Ex_G_Intermediate.java')
-rw-r--r-- | HDF5Examples/JAVA/H5G/H5Ex_G_Intermediate.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/HDF5Examples/JAVA/H5G/H5Ex_G_Intermediate.java b/HDF5Examples/JAVA/H5G/H5Ex_G_Intermediate.java new file mode 100644 index 0000000..5461725 --- /dev/null +++ b/HDF5Examples/JAVA/H5G/H5Ex_G_Intermediate.java @@ -0,0 +1,125 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * All rights reserved. * + * * + * This file is part of HDF5. The full HDF5 copyright notice, including * + * terms governing use, modification, and redistribution, is contained in * + * the COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://www.hdfgroup.org/licenses. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/************************************************************ + This example shows how to create intermediate groups with + a single call to H5Gcreate. + ************************************************************/ + +import java.util.ArrayList; + +import hdf.hdf5lib.H5; +import hdf.hdf5lib.HDF5Constants; +import hdf.hdf5lib.callbacks.H5O_iterate_opdata_t; +import hdf.hdf5lib.callbacks.H5O_iterate_t; +import hdf.hdf5lib.structs.H5O_info_t; + +public class H5Ex_G_Intermediate { + + private static String FILE = "H5Ex_G_Intermediate.h5"; + + private void CreateGroup() throws Exception + { + + long file_id = HDF5Constants.H5I_INVALID_HID; + long group_id = HDF5Constants.H5I_INVALID_HID; + long gcpl_id = HDF5Constants.H5I_INVALID_HID; + + try { + // Create a new file_id using the default properties. + file_id = H5.H5Fcreate(FILE, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + + // Create group_id creation property list and set it to allow creation of intermediate group_ids. + gcpl_id = H5.H5Pcreate(HDF5Constants.H5P_LINK_CREATE); + H5.H5Pset_create_intermediate_group(gcpl_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. + */ + group_id = H5.H5Gcreate(file_id, "/G1/G2/G3", gcpl_id, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + // 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_opdata_t iter_data = null; + H5O_iterate_opdata_t iter_data = new H5O_iter_data(); + H5O_iterate_t 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 (gcpl_id >= 0) + H5.H5Pclose(gcpl_id); + if (group_id >= 0) + H5.H5Gclose(group_id); + if (file_id >= 0) + H5.H5Fclose(file_id); + } + } + + public static void main(String[] args) + { + try { + (new H5Ex_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_opdata_t { + public ArrayList<idata> iterdata = new ArrayList<idata>(); + } + + private class H5O_iter_callback implements H5O_iterate_t { + public int callback(long group, String name, H5O_info_t info, H5O_iterate_opdata_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; + } + } +} |