[svn-r29226] HDFFV-9552: merge in java code.

1 files changed, 227 insertions, 0 deletions

diff --git a/java/examples/datatypes/H5Ex_T_Float.java b/java/examples/datatypes/H5Ex_T_Float.java
new file mode 100644
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+++ b/java/examples/datatypes/H5Ex_T_Float.java
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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/************************************************************
+  This example shows how to read and write integer datatypes
+  to a dataset.  The program first writes integers to a
+  dataset with a dataspace of DIM0xDIM1, then closes the
+  file.  Next, it reopens the file, reads back the data, and
+  outputs it to the screen.
+ ************************************************************/
+
+package examples.datatypes;
+
+import java.text.DecimalFormat;
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+
+public class H5Ex_T_Float {
+    private static String FILENAME = "H5Ex_T_Float.h5";
+    private static String DATASETNAME = "DS1";
+    private static final int DIM0 = 4;
+    private static final int DIM1 = 7;
+    private static final int RANK = 2;
+
+    private static void CreateDataset() {
+        long file_id = -1;
+        long dataspace_id = -1;
+        long dataset_id = -1;
+        long[] dims = { DIM0, DIM1 };
+        double[][] dset_data = new double[DIM0][DIM1];
+
+        // Initialize data.
+        for (int indx = 0; indx < DIM0; indx++)
+            for (int jndx = 0; jndx < DIM1; jndx++) {
+                dset_data[indx][jndx] = indx / (jndx + 0.5) + jndx;
+            }
+
+        // Create a new file using default properties.
+        try {
+            file_id = H5.H5Fcreate(FILENAME, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT,
+                    HDF5Constants.H5P_DEFAULT);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Create dataspace. Setting maximum size to NULL sets the maximum
+        // size to be the current size.
+        try {
+            dataspace_id = H5.H5Screate_simple(RANK, dims, null);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Create the dataset and write the floating point data to it. In
+        // this example we will save the data as 64 bit little endian IEEE
+        // floating point numbers, regardless of the native type. The HDF5
+        // library automatically converts between different floating point
+        // types.
+        try {
+            if ((file_id >= 0) && (dataspace_id >= 0))
+                dataset_id = H5.H5Dcreate(file_id, DATASETNAME, HDF5Constants.H5T_IEEE_F64LE, dataspace_id,
+                        HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Write the data to the dataset.
+        try {
+            if (dataset_id >= 0)
+                H5.H5Dwrite(dataset_id, HDF5Constants.H5T_NATIVE_DOUBLE, HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL,
+                        HDF5Constants.H5P_DEFAULT, dset_data);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // End access to the dataset and release resources used by it.
+        try {
+            if (dataset_id >= 0)
+                H5.H5Dclose(dataset_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Terminate access to the data space.
+        try {
+            if (dataspace_id >= 0)
+                H5.H5Sclose(dataspace_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Close the file.
+        try {
+            if (file_id >= 0)
+                H5.H5Fclose(file_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    private static void ReadDataset() {
+        long file_id = -1;
+        long dataspace_id = -1;
+        long dataset_id = -1;
+        long[] dims = { DIM0, DIM1 };
+        double[][] dset_data;
+
+        // Open an existing file.
+        try {
+            file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Open an existing dataset.
+        try {
+            if (file_id >= 0)
+                dataset_id = H5.H5Dopen(file_id, DATASETNAME, HDF5Constants.H5P_DEFAULT);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Get dataspace and allocate memory for read buffer.
+        try {
+            if (dataset_id >= 0)
+                dataspace_id = H5.H5Dget_space(dataset_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        try {
+            if (dataspace_id >= 0)
+                H5.H5Sget_simple_extent_dims(dataspace_id, dims, null);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Allocate array of pointers to two-dimensional arrays (the
+        // elements of the dataset.
+        dset_data = new double[(int) dims[0]][(int) (dims[1])];
+
+        // Read data.
+        try {
+            if (dataset_id >= 0)
+                H5.H5Dread(dataset_id, HDF5Constants.H5T_NATIVE_DOUBLE, HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL,
+                        HDF5Constants.H5P_DEFAULT, dset_data);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Output the data to the screen.
+        DecimalFormat df = new DecimalFormat("#,##0.0000");
+        System.out.println(DATASETNAME + ":");
+        for (int indx = 0; indx < dims[0]; indx++) {
+            System.out.print(" [");
+            for (int jndx = 0; jndx < dims[1]; jndx++) {
+                System.out.print(" " + df.format(dset_data[indx][jndx]));
+            }
+            System.out.println("]");
+        }
+        System.out.println();
+
+        // End access to the dataset and release resources used by it.
+        try {
+            if (dataset_id >= 0)
+                H5.H5Dclose(dataset_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Terminate access to the data space.
+        try {
+            if (dataspace_id >= 0)
+                H5.H5Sclose(dataspace_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        // Close the file.
+        try {
+            if (file_id >= 0)
+                H5.H5Fclose(file_id);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    public static void main(String[] args) {
+        H5Ex_T_Float.CreateDataset();
+        // Now we begin the read section of this example. Here we assume
+        // the dataset and array have the same name and rank, but can have
+        // any size. Therefore we must allocate a new array to read in
+        // data using malloc().
+        H5Ex_T_Float.ReadDataset();
+    }
+
+}