mirror of
https://github.com/HDFGroup/hdf5.git
synced 2026-09-25 04:09:44 +03:00
Allen Byrne
b754dcb8f2
FFM build requires Java 25, Jextract 25. Generates FFM bindings during configure. JNI is default when the requirements are not met or can be forced. Presets added for maven and FFM - JNI is default selection. Enhanced Maven options will work with either JNI or FFM New Workflows for testing and maven uploads. Extensive documentation changes for java.
270 lines
9.0 KiB
Java
270 lines
9.0 KiB
Java
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the LICENSE file, which can be found at the root of the source code *
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* distribution tree, or in https://www.hdfgroup.org/licenses. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/************************************************************
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Creating a file and print the storage layout.
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************************************************************/
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import static org.hdfgroup.javahdf5.hdf5_h.*;
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import java.lang.foreign.Arena;
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import java.lang.foreign.MemorySegment;
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import java.lang.foreign.ValueLayout;
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import java.util.EnumSet;
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import java.util.HashMap;
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import java.util.Map;
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import org.hdfgroup.javahdf5.H5G_info_t;
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public class H5Ex_G_Compact {
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private static final String FILE1 = "H5Ex_G_Compact1.h5";
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private static final String FILE2 = "H5Ex_G_Compact2.h5";
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private static final String GROUP = "G1";
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enum H5G_storage {
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H5G_STORAGE_TYPE_UNKNOWN(-1),
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H5G_STORAGE_TYPE_SYMBOL_TABLE(0),
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H5G_STORAGE_TYPE_COMPACT(1),
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H5G_STORAGE_TYPE_DENSE(2);
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private static final Map<Integer, H5G_storage> lookup = new HashMap<Integer, H5G_storage>();
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static
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{
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for (H5G_storage s : EnumSet.allOf(H5G_storage.class))
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lookup.put(s.getCode(), s);
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}
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private int code;
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H5G_storage(int layout_type) { this.code = layout_type; }
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public int getCode() { return this.code; }
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public static H5G_storage get(int code) { return lookup.get(code); }
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}
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public static void CreateGroup(Arena arena)
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{
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long file_id = H5I_INVALID_HID();
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long group_id = H5I_INVALID_HID();
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long fapl_id = H5I_INVALID_HID();
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MemorySegment ginfo = H5G_info_t.allocate(arena);
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long size;
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// Create file 1. This file will use original format groups.
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try {
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file_id = H5Fcreate(arena.allocateFrom(FILE1), H5F_ACC_TRUNC(), H5P_DEFAULT(), H5P_DEFAULT());
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Create a group in the file1.
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try {
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if (file_id >= 0)
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group_id = H5Gcreate2(file_id, arena.allocateFrom(GROUP), H5P_DEFAULT(), H5P_DEFAULT(),
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H5P_DEFAULT());
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Obtain the group info and print the group storage type.
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try {
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if (group_id >= 0) {
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H5Gget_info(group_id, ginfo);
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System.out.print("Group storage type for " + FILE1 + " is: ");
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switch (H5G_storage.get(H5G_info_t.storage_type(ginfo))) {
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case H5G_STORAGE_TYPE_COMPACT:
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System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format
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break;
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case H5G_STORAGE_TYPE_DENSE:
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System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format
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break;
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case H5G_STORAGE_TYPE_SYMBOL_TABLE:
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System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format
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break;
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case H5G_STORAGE_TYPE_UNKNOWN:
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System.out.println("H5G_STORAGE_TYPE_UNKNOWN");
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break;
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default:
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System.out.println("Storage Type Invalid");
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break;
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}
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Close the group.
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try {
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if (group_id >= 0)
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H5Gclose(group_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// close the file 1.
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try {
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if (file_id >= 0)
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H5Fclose(file_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Re-open file 1. Need to get the correct file size.
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try {
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file_id = H5Fopen(arena.allocateFrom(FILE1), H5F_ACC_RDONLY(), H5P_DEFAULT());
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Obtain and print the file size.
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try {
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if (file_id >= 0) {
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MemorySegment sizeSeg = arena.allocate(ValueLayout.JAVA_LONG);
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H5Fget_filesize(file_id, sizeSeg);
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size = sizeSeg.get(ValueLayout.JAVA_LONG, 0);
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System.out.println("File size for " + FILE1 + " is: " + size + " bytes");
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Close FILE1.
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try {
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if (file_id >= 0)
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H5Fclose(file_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Set file access property list to allow the latest file format.
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// This will allow the library to create new compact format groups.
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try {
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fapl_id = H5Pcreate(H5P_CLS_FILE_ACCESS_ID_g());
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if (fapl_id >= 0)
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H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST(), H5F_LIBVER_LATEST());
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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System.out.println();
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// Create file 2 using the new file access property list.
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try {
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file_id = H5Fcreate(arena.allocateFrom(FILE2), H5F_ACC_TRUNC(), H5P_DEFAULT(), fapl_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Create group in file2.
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try {
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if (file_id >= 0)
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group_id = H5Gcreate2(file_id, arena.allocateFrom(GROUP), H5P_DEFAULT(), H5P_DEFAULT(),
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H5P_DEFAULT());
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Obtain the group info and print the group storage type.
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try {
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if (group_id >= 0) {
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H5Gget_info(group_id, ginfo);
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System.out.print("Group storage type for " + FILE2 + " is: ");
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switch (H5G_storage.get(H5G_info_t.storage_type(ginfo))) {
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case H5G_STORAGE_TYPE_COMPACT:
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System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format
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break;
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case H5G_STORAGE_TYPE_DENSE:
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System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format
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break;
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case H5G_STORAGE_TYPE_SYMBOL_TABLE:
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System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format
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break;
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case H5G_STORAGE_TYPE_UNKNOWN:
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System.out.println("H5G_STORAGE_TYPE_UNKNOWN");
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break;
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default:
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System.out.println("Storage Type Invalid");
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break;
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}
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Close the group.
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try {
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if (group_id >= 0)
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H5Gclose(group_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// close the file 2.
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try {
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if (file_id >= 0)
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H5Fclose(file_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Re-open file 2. Needed to get the correct file size.
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try {
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file_id = H5Fopen(arena.allocateFrom(FILE2), H5F_ACC_RDONLY(), fapl_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Obtain and print the file size.
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try {
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if (file_id >= 0) {
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MemorySegment sizeSeg = arena.allocate(ValueLayout.JAVA_LONG);
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H5Fget_filesize(file_id, sizeSeg);
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size = sizeSeg.get(ValueLayout.JAVA_LONG, 0);
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System.out.println("File size for " + FILE2 + " is: " + size + " bytes");
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Close FILE2.
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try {
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if (file_id >= 0)
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H5Fclose(file_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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}
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public static void main(String[] args)
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{
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try (Arena arena = Arena.ofConfined()) {
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H5Ex_G_Compact.CreateGroup(arena);
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}
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}
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}
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