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

1 files changed, 152 insertions, 0 deletions

diff --git a/java/examples/groups/H5Ex_G_Visit.java b/java/examples/groups/H5Ex_G_Visit.java
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+++ b/java/examples/groups/H5Ex_G_Visit.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 recursively traverse a file
+ using H5Ovisit and H5Lvisit.  The program prints all of
+ the objects in the file specified in FILE, then prints all
+ of the links in that file.  The default file used by this
+ example implements the structure described in the User's
+ Guide, chapter 4, figure 26.
+ ************************************************************/
+package examples.groups;
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+import hdf.hdf5lib.callbacks.H5L_iterate_cb;
+import hdf.hdf5lib.callbacks.H5L_iterate_t;
+import hdf.hdf5lib.callbacks.H5O_iterate_cb;
+import hdf.hdf5lib.callbacks.H5O_iterate_t;
+import hdf.hdf5lib.structs.H5L_info_t;
+import hdf.hdf5lib.structs.H5O_info_t;
+
+import java.util.ArrayList;
+
+public class H5Ex_G_Visit {
+
+    private static String FILE = "groups/h5ex_g_visit.h5";
+
+    public static void main(String[] args) {
+        try {
+            (new H5Ex_G_Visit()).VisitGroup();
+        }
+        catch (Exception ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    private void VisitGroup() throws Exception {
+
+        long file_id = -1;
+
+        try {
+            // Open file
+            file_id = H5.H5Fopen(FILE, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
+
+            // Begin iteration using H5Ovisit
+            System.out.println("Objects in the file:");
+            H5O_iterate_t iter_data = new H5O_iter_data();
+            H5O_iterate_cb iter_cb = new H5O_iter_callback();
+            H5.H5Ovisit(file_id, HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_NATIVE, iter_cb, iter_data);
+            System.out.println();
+            // Repeat the same process using H5Lvisit
+            H5L_iterate_t iter_data2 = new H5L_iter_data();
+            H5L_iterate_cb iter_cb2 = new H5L_iter_callback();
+            System.out.println("Links in the file:");
+            H5.H5Lvisit(file_id, HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_NATIVE, iter_cb2, iter_data2);
+
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+        finally {
+            // Close and release resources.
+            if (file_id >= 0)
+                H5.H5Fclose(file_id);
+        }
+    }
+
+    /************************************************************
+     * Operator function for H5Lvisit. This function simply retrieves the info for the object the current link points
+     * to, and calls the operator function for H5Ovisit.
+     ************************************************************/
+
+    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 H5L_iter_data implements H5L_iterate_t {
+        public ArrayList<idata> iterdata = new ArrayList<idata>();
+    }
+
+    private class H5L_iter_callback implements H5L_iterate_cb {
+        public int callback(long group, String name, H5L_info_t info, H5L_iterate_t op_data) {
+
+            idata id = new idata(name, info.type);
+            ((H5L_iter_data) op_data).iterdata.add(id);
+
+            H5O_info_t infobuf;
+            int ret = 0;
+            try {
+                // Get type of the object and display its name and type. The name of the object is passed to this
+                // function by the Library.
+                infobuf = H5.H5Oget_info_by_name(group, name, HDF5Constants.H5P_DEFAULT);
+                H5O_iterate_cb iter_cbO = new H5O_iter_callback();
+                H5O_iterate_t iter_dataO = new H5O_iter_data();
+                ret = iter_cbO.callback(group, name, infobuf, iter_dataO);
+            }
+            catch (Exception e) {
+                e.printStackTrace();
+            }
+
+            return ret;
+        }
+    }
+
+    private class H5O_iter_data implements H5O_iterate_t {
+        public ArrayList<idata> iterdata = new ArrayList<idata>();
+    }
+
+    private class H5O_iter_callback implements H5O_iterate_cb {
+        public int callback(long group, String name, H5O_info_t info, H5O_iterate_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;
+        }
+    }
+
+}