[svn-r3621] This commit was manufactured by cvs2svn to create branch 'hdf5_1_4'.

doc/html/Tutor/examples/java/DatasetRdWt.java

@@ -0,0 +1,213 @@
+/******************************************************************
+ * DatasetRdWt.java (for HDF5 tutorial lesson 6)
+ *
+ *   -- Reading and Writing an existing Dataset
+ *      (a java conversion from h5_rdwt.c)
+ *
+ ******************************************************************/
+
+import ncsa.hdf.hdf5lib.*;
+import ncsa.hdf.hdf5lib.exceptions.*;
+
+public class DatasetRdWt
+{
+   public static void main(String []argv) 
+   {
+      final String FILE = "dset.h5";
+      int file_id = -1;       // file identifier 
+      int dataset_id = -1;    // dataset identifier
+      int status = -1;
+      int[][] dset_data = new int[4][6];
+      
+      // Initialize the dataset.
+      for (int i = 0; i < 4; i++)
+	 for (int j = 0; j < 6; j++)
+	    dset_data[i][j] = i * 6 + j + 1;
+     
+      // Open an existing file
+      file_id = H5Fopen_wrap (FILE, HDF5Constants.H5F_ACC_RDWR, 
+			      HDF5Constants.H5P_DEFAULT);
+	
+      // Open an existing dataset.
+      dataset_id = H5Dopen_wrap (file_id, "/dset");	 
+      
+      // Write the dataset. 
+      status = H5Dwrite_wrap 
+	  (dataset_id, H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT), 
+	   HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL, 
+	   HDF5Constants.H5P_DEFAULT, dset_data);
+
+      status = H5Dread_wrap 
+	  (dataset_id, H5.J2C (HDF5CDataTypes.JH5T_NATIVE_INT), 
+	   HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL, 
+	   HDF5Constants.H5P_DEFAULT, dset_data);
+
+      // Close the dataset.
+      status = H5Dclose_wrap (dataset_id);
+	 
+      // Close the file.
+      status = H5Fclose_wrap (file_id);
+   }
+
+
+   // Help function for opening an existing file
+   public static int H5Fopen_wrap (String name, int flags, int access_id)
+   {
+      int file_id = -1;    // file identifier 
+      try 
+      {
+	 // Create a new file using default file properties.
+	 file_id = H5.H5Fopen (name, flags, access_id);
+      }
+      catch (HDF5Exception hdf5e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Fopen_wrap() with HDF5Exception: "
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Fopen_wrap() with other Exception: " 
+	      + e.getMessage());
+      }
+      return file_id;
+   }
+
+
+   // Help function for opening an existing dataset
+   public static int H5Dopen_wrap (int loc_id, String name)
+   {
+      int dataset_id = -1;  // dataset identifier   
+   
+      try 
+      {
+	 // Opening an existing dataset
+	 dataset_id = H5.H5Dopen (loc_id, name);
+      }
+      catch (HDF5Exception hdf5e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dopen_wrap() with HDF5Exception: "
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dopen_wrap() with other Exception: "
+	      + e.getMessage());
+      }
+      return dataset_id;
+   }
+
+ 
+   // Help function for writing the dataset
+   public static int H5Dwrite_wrap (int dataset_id, int mem_type_id,
+				    int mem_space_id, int file_space_id,
+				    int xfer_plist_id, Object buf)
+   {
+      int status = -1;
+      
+      try 
+      {
+	 // Write the dataset. 
+	 status = H5.H5Dwrite (dataset_id, mem_type_id, mem_space_id, 
+			       file_space_id, xfer_plist_id, buf);
+      }
+      catch (HDF5Exception hdf5e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dwrite_wrap() with HDF5Exception: " 
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dwrite_wrap() with other exception: " 
+	      + e.getMessage());
+      }
+      return status;
+   }
+ 
+
+   // Help function for reading the dataset
+   public static int H5Dread_wrap (int dataset_id, int mem_type_id,
+				   int mem_space_id, int file_space_id,
+				   int xfer_plist_id, Object obj)
+   {
+      int status = -1; 
+      
+      try 
+      {
+	 // Read the dataset. 
+	 status = H5.H5Dread (dataset_id, mem_type_id, mem_space_id, 
+			      file_space_id, xfer_plist_id, obj);
+      }
+      catch (HDF5Exception hdf5e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dread_wrap() with HDF5Exception: " 
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dread_wrap() with other exception: " 
+	      + e.getMessage());
+      }
+      return status;
+   }
+ 
+      
+   // Help function for ending access to the dataset and releasing 
+   // resources used by it.
+   public static int H5Dclose_wrap (int dataset_id)
+   {
+      int status = -1;
+      
+      try 
+      {
+	 // End access to the dataset and release resources used by it. 
+	 status = H5.H5Dclose (dataset_id);
+      }
+      catch (HDF5Exception hdf5e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dclose_wrap() with HDF5Exception: " 
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Dclose_wrap() with other exception: " 
+	      + e.getMessage());
+      }
+      return status;
+   }
+
+    
+   // Help function for terminating access to the file. 
+   public static int H5Fclose_wrap (int file_id)
+   {
+      int status = -1;
+      
+      try 
+      {
+	 // Terminate access to the file. 
+	 status = H5.H5Fclose (file_id);
+      }
+      catch (HDF5Exception hdf5e)
+      { 
+	 System.out.println 
+	     ("DatasetRdWt.H5Fclose_wrap() with HDF5Exception: " 
+	      + hdf5e.getMessage());
+      }
+      catch (Exception e)
+      {
+	 System.out.println 
+	     ("DatasetRdWt.H5Fclose_wrap() with other exception: " 
+	      + e.getMessage());
+      }
+      return status;
+   }  
+}