/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

package test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.util.ArrayList;

import java.io.File;

import hdf.hdf5lib.H5;
import hdf.hdf5lib.HDF5Constants;
import hdf.hdf5lib.callbacks.H5A_iterate_cb;
import hdf.hdf5lib.callbacks.H5A_iterate_t;
import hdf.hdf5lib.exceptions.HDF5Exception;
import hdf.hdf5lib.exceptions.HDF5LibraryException;
import hdf.hdf5lib.structs.H5A_info_t;

import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;

public class TestH5A {
    @Rule public TestName testname = new TestName();
    private static final String H5_FILE = "testA.h5";
    private static final int DIM_X = 4;
    private static final int DIM_Y = 6;
    long H5fid = HDF5Constants.H5I_INVALID_HID;
    long H5dsid = HDF5Constants.H5I_INVALID_HID;
    long H5did = HDF5Constants.H5I_INVALID_HID;
    long[] H5dims = { DIM_X, DIM_Y };
    long type_id = HDF5Constants.H5I_INVALID_HID;
    long space_id = HDF5Constants.H5I_INVALID_HID;
    long lapl_id = HDF5Constants.H5I_INVALID_HID;

    private final void _deleteFile(String filename) {
        File file = new File(filename);

        if (file.exists()) {
            try {file.delete();} catch (SecurityException e) {}
        }
    }

    private final long _createDataset(long fid, long dsid, String name, long dapl) {
        long did = HDF5Constants.H5I_INVALID_HID;
        try {
            did = H5.H5Dcreate(fid, name, HDF5Constants.H5T_STD_I32BE, dsid,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, dapl);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Dcreate: " + err);
        }
        assertTrue("TestH5A._createDataset: ", did > 0);

        return did;
    }

    @Before
    public void createH5file() throws NullPointerException, HDF5Exception {
        assertTrue("H5 open ids is 0", H5.getOpenIDCount() == 0);
        System.out.print(testname.getMethodName());

        try {
            H5fid = H5.H5Fcreate(H5_FILE, HDF5Constants.H5F_ACC_TRUNC,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            assertTrue("TestH5A.createH5file: H5.H5Fcreate: ", H5fid > 0);
            H5dsid = H5.H5Screate_simple(2, H5dims, null);
            assertTrue("TestH5A.createH5file: H5.H5Screate_simple: ", H5dsid > 0);
            H5did = _createDataset(H5fid, H5dsid, "dset",
                    HDF5Constants.H5P_DEFAULT);
            assertTrue("TestH5A.createH5file: _createDataset: ", H5did > 0);
            space_id = H5.H5Screate(HDF5Constants.H5S_NULL);
            assertTrue(space_id > 0);
            lapl_id = H5.H5Pcreate(HDF5Constants.H5P_ATTRIBUTE_ACCESS);
            assertTrue(lapl_id > 0);
            type_id = H5.H5Tenum_create(HDF5Constants.H5T_STD_I32LE);
            assertTrue(type_id > 0);
            int status = H5.H5Tenum_insert(type_id, "test", 1);
            assertTrue(status >= 0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("TestH5A.createH5file: " + err);
        }

        H5.H5Fflush(H5fid, HDF5Constants.H5F_SCOPE_LOCAL);
    }

    @After
    public void deleteH5file() throws HDF5LibraryException {
        if (H5dsid > 0)
            try {H5.H5Sclose(H5dsid);} catch (Exception ex) {}
        if (H5did > 0)
            try {H5.H5Dclose(H5did);} catch (Exception ex) {}
        if (H5fid > 0)
            try {H5.H5Fclose(H5fid);} catch (Exception ex) {}

        _deleteFile(H5_FILE);

        if (type_id > 0)
            try {H5.H5Tclose(type_id);} catch (Exception ex) {}
        if (space_id > 0)
            try {H5.H5Sclose(space_id);} catch (Exception ex) {}
        if (lapl_id > 0)
            try {H5.H5Pclose(lapl_id);} catch (Exception ex) {}
        System.out.println();
    }

    @Test
    public void testH5Acreate2() {
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        try {
            attr_id = H5.H5Acreate(H5did, "dset", type_id, space_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            assertTrue("testH5Acreate2", attr_id >= 0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Acreate2: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test(expected = HDF5LibraryException.class)
    public void testH5Acreate2_invalidobject() throws Throwable {
        H5.H5Acreate(H5dsid, "dset", type_id, space_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
    }

    @Test(expected = NullPointerException.class)
    public void testH5Acreate2_nullname() throws Throwable {
        H5.H5Acreate(H5did, null, type_id, space_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
    }

    @Test
    public void testH5Aopen() {
        String attr_name = "dset";
        long attribute_id = HDF5Constants.H5I_INVALID_HID;
        long attr_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr_id = H5.H5Acreate(H5did, attr_name, type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);

            // Opening the existing attribute, attr_name(Created by H5ACreate2)
            // attached to an object identifier.
            attribute_id = H5.H5Aopen(H5did, attr_name,
                    HDF5Constants.H5P_DEFAULT);
            assertTrue("testH5Aopen: H5Aopen", attribute_id >= 0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aopen: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test(expected = HDF5LibraryException.class)
    public void testH5Aopen_invalidname() throws Throwable {
        H5.H5Aopen(H5did, "attr_name", HDF5Constants.H5P_DEFAULT);
    }

    @Test
    public void testH5Aopen_by_idx() {
        long loc_id = H5did;
        String obj_name = ".";
        int idx_type = HDF5Constants.H5_INDEX_CRT_ORDER;
        int order = HDF5Constants.H5_ITER_INC;
        long n = 0;
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr_id = H5.H5Acreate(H5did, "file", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);

            // Opening the existing attribute, obj_name(Created by H5ACreate2)
            // by index, attached to an object identifier.
            attribute_id = H5.H5Aopen_by_idx(H5did, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC,
                    0, HDF5Constants.H5P_DEFAULT, lapl_id);

            assertTrue("testH5Aopen_by_idx: H5Aopen_by_idx", attribute_id >= 0);

            // Negative test- Error should be thrown when H5Aopen_by_idx is
            // called
            // with n=5 and we do not have 5 attributes created.
            try {
                n = 5;
                H5.H5Aopen_by_idx(loc_id, obj_name, idx_type, order, n,
                        HDF5Constants.H5P_DEFAULT, lapl_id);
                fail("Negative Test Failed:- Error not Thrown when n is invalid.");
            }
            catch (AssertionError err) {
                fail("H5.H5Aopen_by_idx: " + err);
            }
            catch (HDF5LibraryException err) {}

            // Negative test- Error should be thrown when H5Aopen_by_idx is
            // called
            // with an invalid object name(which hasn't been created).
            try {
                n = 0;
                obj_name = "file";
                H5.H5Aopen_by_idx(loc_id, obj_name, idx_type, order, n,
                        HDF5Constants.H5P_DEFAULT, lapl_id);
                fail("Negative Test Failed:- Error not Thrown when attribute name is invalid.");
            }
            catch (AssertionError err) {
                fail("H5.H5Aopen_by_idx: " + err);
            }
            catch (HDF5LibraryException err) {}
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aopen_by_idx: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Acreate_by_name() {
        String obj_name = ".";
        String attr_name = "DATASET";
        long attribute_id = HDF5Constants.H5I_INVALID_HID;
        boolean bool_val = false;

        try {
            attribute_id = H5.H5Acreate_by_name(H5fid, obj_name, attr_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            assertTrue("testH5Acreate_by_name: H5Acreate_by_name",
                    attribute_id >= 0);

            // Check if the name of attribute attached to the object specified
            // by loc_id and obj_name exists.It should be true.
            bool_val = H5.H5Aexists_by_name(H5fid, obj_name, attr_name,
                    lapl_id);
            assertTrue("testH5Acreate_by_name: H5Aexists_by_name",
                    bool_val == true);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Acreate_by_name " + err);
        }
        finally {
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Arename() throws Throwable, HDF5LibraryException, NullPointerException {
        long loc_id = H5fid;
        String old_attr_name = "old";
        String new_attr_name = "new";
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        int ret_val = -1;
        boolean bool_val = false;

        try {
            attr_id = H5.H5Acreate(loc_id, old_attr_name, type_id, space_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);

            ret_val = H5.H5Arename(loc_id, old_attr_name, new_attr_name);

            // Check the return value.It should be non negative.
            assertTrue("testH5Arename: H5Arename", ret_val >= 0);

            // Check if the new name of attribute attached to the object
            // specified by loc_id and obj_name exists.It should be true.
            bool_val = H5.H5Aexists(loc_id, new_attr_name);
            assertTrue("testH5Arename: H5Aexists", bool_val == true);

            // Check if the old name of attribute attached to the object
            // specified by loc_id and obj_name exists. It should equal false.
            bool_val = H5.H5Aexists(loc_id, old_attr_name);
            assertEquals(bool_val, false);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Arename " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Arename_by_name() {
        long loc_id = H5fid;
        String obj_name = ".";
        String old_attr_name = "old";
        String new_attr_name = "new";
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        int ret_val = -1;
        boolean bool_val = false;

        try {
            attr_id = H5.H5Acreate_by_name(loc_id, obj_name, old_attr_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, lapl_id);

            ret_val = H5.H5Arename_by_name(loc_id, obj_name, old_attr_name,
                    new_attr_name, lapl_id);

            // Check the return value.It should be non negative.
            assertTrue("testH5Arename_by_name: H5Arename_by_name", ret_val >= 0);

            // Check if the new name of attribute attached to the object
            // specified by loc_id and obj_name exists.It should be true.
            bool_val = H5.H5Aexists_by_name(loc_id, obj_name, new_attr_name,
                    lapl_id);
            assertTrue("testH5Arename_by_name: H5Aexists_by_name",
                    bool_val == true);

            // Check if the old name of attribute attached to the object
            // specified by loc_id and obj_name exists. It should equal false.
            bool_val = H5.H5Aexists_by_name(loc_id, obj_name, old_attr_name,
                    lapl_id);
            assertEquals(bool_val, false);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Arename_by_name " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_name() {
        String obj_name = ".";
        String attr_name = "DATASET1";
        String ret_name = null;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attribute_id = H5.H5Acreate_by_name(H5fid, obj_name, attr_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            assertTrue("testH5Aget_name: H5Acreate_by_name ", attribute_id > 0);
            ret_name = H5.H5Aget_name(attribute_id);
            assertEquals(ret_name, attr_name);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("testH5Aget_name " + err);
        }
        finally {
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }


    @Test
    public void testH5Aget_name_by_idx() {
        long loc_id = H5fid;
        String obj_name = ".";
        String attr_name = "DATASET1", attr2_name = "DATASET2";
        String ret_name = null;
        int idx_type = HDF5Constants.H5_INDEX_NAME;
        int order = HDF5Constants.H5_ITER_INC;
        int n = 0;
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr1_id = H5.H5Acreate_by_name(loc_id, obj_name, attr_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(loc_id, obj_name, attr2_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);

            // getting the 1st attribute name(n=0).
            ret_name = H5.H5Aget_name_by_idx(loc_id, obj_name, idx_type, order,
                    n, lapl_id);
            assertFalse("H5Aget_name_by_idx ", ret_name == null);
            assertEquals(ret_name, attr_name);

            // getting the second attribute name(n=1)
            ret_name = H5.H5Aget_name_by_idx(loc_id, obj_name, idx_type, order,
                    1, lapl_id);
            assertFalse("H5Aget_name_by_idx ", ret_name == null);
            assertEquals(ret_name, attr2_name);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_name_by_idx " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_storage_size() {
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        long attr_size = HDF5Constants.H5I_INVALID_HID;

        try {
            attr_id = H5.H5Acreate(H5did, "dset", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);

            attr_size = H5.H5Aget_storage_size(attr_id);
            assertTrue("The size of attribute is :", attr_size == 0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_storage_size: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_info() {
        H5A_info_t attr_info = null;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;
        long attr_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr_id = H5.H5Acreate(H5did, "dset", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            attribute_id = H5.H5Aopen(H5did, "dset", HDF5Constants.H5P_DEFAULT);
            // Calling H5Aget_info with attribute_id returned from H5Aopen.
            attr_info = H5.H5Aget_info(attribute_id);
            assertFalse("H5Aget_info ", attr_info == null);
            assertTrue("Corder_Valid should be false",
                    attr_info.corder_valid == false);
            assertTrue("Character set used for attribute name",
                    attr_info.cset == HDF5Constants.H5T_CSET_ASCII);
            assertTrue("Corder ", attr_info.corder == 0);
            assertEquals(attr_info.data_size, H5.H5Aget_storage_size(attr_id));
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_info: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_info1() {
        H5A_info_t attr_info = null;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        int order = HDF5Constants.H5_ITER_INC;

        try {
            attr_id = H5.H5Acreate(H5did, ".", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            attribute_id = H5.H5Aopen_by_idx(H5did, ".",
                    HDF5Constants.H5_INDEX_CRT_ORDER, order, 0,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            // Calling H5Aget_info with attribute_id returned from
            // H5Aopen_by_idx.
            attr_info = H5.H5Aget_info(attribute_id);

            assertFalse("H5Aget_info ", attr_info == null);
            assertTrue("Corder_Valid should be true",
                    attr_info.corder_valid == true);
            assertTrue("Character set",
                    attr_info.cset == HDF5Constants.H5T_CSET_ASCII);
            assertTrue("Corder ", attr_info.corder == 0);
            assertEquals(attr_info.data_size, H5.H5Aget_storage_size(attr_id));
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_info1: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_info_by_idx() {
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;;
        H5A_info_t attr_info = null;

        try {
            attr_id = H5.H5Acreate(H5did, "dset1", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            attr2_id = H5.H5Acreate(H5did, "dataset2", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);

            //Verify info for 1st attribute, in increasing creation order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC, 0, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder ", attr_info.corder == 0);//should equal 0 as this is the order of 1st attribute created.
            assertEquals(attr_info.data_size, H5.H5Aget_storage_size(attr_id));

            //Verify info for 2nd attribute, in increasing creation order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC, 1, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder", attr_info.corder == 1);
            assertEquals(attr_info.data_size, H5.H5Aget_storage_size(attr2_id));

            //verify info for 2nd attribute, in decreasing creation order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_DEC, 0, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder", attr_info.corder == 1); //should equal 1 as this is the order of 2nd attribute created.

            //verify info for 1st attribute, in decreasing creation order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_DEC, 1, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder", attr_info.corder == 0); //should equal 0 as this is the order of 1st attribute created.

            //verify info for 1st attribute, in increasing name order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_INC, 1, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder", attr_info.corder == 0); //should equal 0 as this is the order of 1st attribute created.

            //verify info for 2nd attribute, in decreasing name order
            attr_info = H5.H5Aget_info_by_idx(H5did, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_DEC, 1, lapl_id);
            assertNotNull(attr_info);
            assertTrue("Corder", attr_info.corder == 1); //should equal 1 as this is the order of 2nd attribute created.
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_info_by_idx:" + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_info_by_name() {
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        H5A_info_t attr_info = null;
        String obj_name = ".";
        String attr_name = "DATASET";

        try {
            attr_id = H5.H5Acreate_by_name(H5fid, obj_name, attr_name, type_id,
                    space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr_info = H5.H5Aget_info_by_name(H5fid, obj_name, attr_name,
                    lapl_id);
            assertNotNull(attr_info);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aget_info_by_name:" + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Adelete_by_name() {
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        int ret_val = -1;
        boolean bool_val = false;
        boolean exists = false;

        try {
            attr_id = H5.H5Acreate_by_name(H5fid, ".", "DATASET",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            ret_val = H5.H5Adelete_by_name(H5fid, ".", "DATASET", lapl_id);
            assertTrue("H5Adelete_by_name", ret_val >= 0);

            // Check if the Attribute still exists.
            bool_val = H5.H5Aexists_by_name(H5fid, ".", "DATASET",
                    lapl_id);
            assertFalse("testH5Adelete_by_name: H5Aexists_by_name", bool_val);
            exists = H5.H5Aexists(H5fid, "DATASET");
            assertFalse("testH5Adelete_by_name: H5Aexists ",exists);

            // Negative test. Error thrown when we try to delete an attribute
            // that has already been deleted.
            try{
                ret_val = H5.H5Adelete_by_name(H5fid, ".", "DATASET", lapl_id);
                fail("Negative Test Failed: Error Not thrown.");
            }
            catch (AssertionError err) {
                fail("H5.H5Adelete_by_name: " + err);
            }
            catch (HDF5LibraryException err) {}
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Adelete_by_name " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aexists() {
        boolean exists = false;
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;

        try {
            exists = H5.H5Aexists(H5fid, "None");
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aexists: " + err);
        }
        assertFalse("H5Aexists ", exists);

        try {
            attr_id = H5.H5Acreate(H5fid, "dset", type_id, space_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            exists = H5.H5Aexists(H5fid, "dset");
            assertTrue("H5Aexists ", exists);

            attribute_id = H5.H5Acreate_by_name(H5fid, ".", "attribute",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            exists = H5.H5Aexists(H5fid, "attribute");
            assertTrue("H5Aexists ", exists);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aexists: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Adelete_by_idx_order() {
        boolean exists = false;
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;
        long attr3_id = HDF5Constants.H5I_INVALID_HID;
        long attr4_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr1_id = H5.H5Acreate_by_name(H5fid, ".", "attribute1",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(H5fid, ".", "attribute2",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr3_id = H5.H5Acreate_by_name(H5fid, ".", "attribute3",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr4_id = H5.H5Acreate_by_name(H5fid, ".", "attribute4",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);

            H5.H5Adelete_by_idx(H5fid, ".", HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC, 3, lapl_id);
            exists = H5.H5Aexists(H5fid, "attribute4");
            assertFalse("H5Adelete_by_idx: H5Aexists", exists);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Adelete_by_idx: " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
            if (attr3_id > 0)
                try {H5.H5Aclose(attr3_id);} catch (Exception ex) {}
            if (attr4_id > 0)
                try {H5.H5Aclose(attr4_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Adelete_by_idx_name1() {
        boolean exists = false;
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;
        long attr3_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr1_id = H5.H5Acreate_by_name(H5fid, ".", "attribute1",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(H5fid, ".", "attribute2",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr3_id = H5.H5Acreate_by_name(H5fid, ".", "attribute3",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            H5.H5Adelete_by_idx(H5fid, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_INC, 2, lapl_id);
            exists = H5.H5Aexists(H5fid, "attribute3");
            assertFalse("H5Adelete_by_idx: H5Aexists", exists);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Adelete_by_idx: " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
            if (attr3_id > 0)
                try {H5.H5Aclose(attr3_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Adelete_by_idx_name2() {
        boolean exists = false;
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;
        long attr3_id = HDF5Constants.H5I_INVALID_HID;
        long attr4_id = HDF5Constants.H5I_INVALID_HID;

        try {
            attr1_id = H5.H5Acreate_by_name(H5fid, ".", "attribute1",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(H5fid, ".", "attribute2",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr3_id = H5.H5Acreate_by_name(H5fid, ".", "attribute3",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr4_id = H5.H5Acreate_by_name(H5fid, ".", "attribute4",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);

            H5.H5Adelete_by_idx(H5fid, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_DEC, 3, lapl_id);
            exists = H5.H5Aexists(H5fid, "attribute1");
            assertFalse("H5Adelete_by_idx: H5Aexists", exists);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Adelete_by_idx: " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
            if (attr3_id > 0)
                try {H5.H5Aclose(attr3_id);} catch (Exception ex) {}
            if (attr4_id > 0)
                try {H5.H5Aclose(attr4_id);} catch (Exception ex) {}
        }
    }

    @Test(expected = NullPointerException.class)
    public void testH5Adelete_by_idx_null() throws Throwable {
        H5.H5Adelete_by_idx(H5fid, null, HDF5Constants.H5_INDEX_CRT_ORDER,
                HDF5Constants.H5_ITER_INC, 0, lapl_id);
    }

    @Test(expected = HDF5LibraryException.class)
    public void testH5Adelete_by_idx_invalidobject() throws Throwable {
        H5.H5Adelete_by_idx(H5fid, "invalid", HDF5Constants.H5_INDEX_CRT_ORDER,
                HDF5Constants.H5_ITER_INC, 0, lapl_id);
    }

    @Test
    public void testH5Aopen_by_name() {
        String obj_name = ".";
        String attr_name = "DATASET";
        long attribute_id = HDF5Constants.H5I_INVALID_HID;
        long aid = HDF5Constants.H5I_INVALID_HID;

        try {
            attribute_id = H5.H5Acreate_by_name(H5fid, obj_name, attr_name,
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);

            //open Attribute by name
            if(attribute_id >= 0) {
                try {
                    aid = H5.H5Aopen_by_name(H5fid, obj_name, attr_name, HDF5Constants.H5P_DEFAULT, lapl_id);
                    assertTrue("testH5Aopen_by_name: ", aid>=0);
                }
                catch(Throwable err) {
                    err.printStackTrace();
                    fail("H5.H5Aopen_by_name " + err);
                }
            }
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.H5Aopen_by_name " + err);
        }
        finally {
            if (aid > 0)
                try {H5.H5Aclose(aid);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Awrite_readVL() {
        String attr_name = "VLdata";
        long attr_id = HDF5Constants.H5I_INVALID_HID;
        long atype_id = HDF5Constants.H5I_INVALID_HID;
        long aspace_id = HDF5Constants.H5I_INVALID_HID;
        String[] str_data = { "Parting", "is such", "sweet", "sorrow." };
        long[] dims = { str_data.length };
        long lsize = 1;

        try {
            atype_id = H5.H5Tcopy(HDF5Constants.H5T_C_S1);
            assertTrue("testH5Awrite_readVL.H5Tcopy: ", atype_id >= 0);
            H5.H5Tset_size(atype_id, HDF5Constants.H5T_VARIABLE);
            assertTrue("testH5Awrite_readVL.H5Tis_variable_str", H5.H5Tis_variable_str(atype_id));
        }
        catch (Exception err) {
            if (atype_id > 0)
                try {H5.H5Tclose(atype_id);} catch (Exception ex) {}
            err.printStackTrace();
            fail("H5.testH5Awrite_readVL: " + err);
        }

        try {
            aspace_id = H5.H5Screate_simple(1, dims, null);
            assertTrue(aspace_id > 0);
            attr_id = H5.H5Acreate(H5did, attr_name, atype_id, aspace_id,
                    HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
            assertTrue("testH5Awrite_readVL: ", attr_id >= 0);

            H5.H5AwriteVL(attr_id, atype_id, str_data);

            H5.H5Fflush(H5fid, HDF5Constants.H5F_SCOPE_LOCAL);

            for (int j = 0; j < dims.length; j++) {
                lsize *= dims[j];
            }
            String[] strs = new String[(int) lsize];
            for (int j = 0; j < lsize; j++) {
                strs[j] = "";
            }
            try {
                H5.H5AreadVL(attr_id, atype_id, strs);
            }
            catch (Exception ex) {
                ex.printStackTrace();
            }
            assertTrue("testH5Awrite_readVL:", str_data[0].equals(strs[0]));
            assertTrue("testH5Awrite_readVL:", str_data[1].equals(strs[1]));
            assertTrue("testH5Awrite_readVL:", str_data[2].equals(strs[2]));
            assertTrue("testH5Awrite_readVL:", str_data[3].equals(strs[3]));
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("H5.testH5Awrite_readVL: " + err);
        }
        finally {
            if (attr_id > 0)
                try {H5.H5Aclose(attr_id);} catch (Exception ex) {}
            if (aspace_id > 0)
                try {H5.H5Sclose(aspace_id);} catch (Exception ex) {}
            if (atype_id > 0)
                try {H5.H5Tclose(atype_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aget_create_plist() {
        String attr_name = "DATASET1";
        int char_encoding = 0;
        long plist_id = HDF5Constants.H5I_INVALID_HID;
        long attribute_id = HDF5Constants.H5I_INVALID_HID;

        try {
            plist_id = H5.H5Pcreate(HDF5Constants.H5P_ATTRIBUTE_CREATE);
            assertTrue(plist_id > 0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("testH5Aget_create_plist: H5Pcreate " + err);
        }
        try {
            // Get the character encoding and ensure that it is the default (ASCII)
            try {
                char_encoding = H5.H5Pget_char_encoding(plist_id);
            }
            catch (Throwable err) {
                err.printStackTrace();
                fail("H5Pget_char_encoding: " + err);
            }
            assertTrue("testH5Aget_create_plist: get_char_encoding", char_encoding == HDF5Constants.H5T_CSET_ASCII);

            // Create an attribute for the dataset using the property list
            try {
                attribute_id = H5.H5Acreate(H5fid, attr_name, type_id, space_id, plist_id, HDF5Constants.H5P_DEFAULT);
                assertTrue("testH5Aget_create_plist: H5Acreate", attribute_id >= 0);
            }
            catch (Throwable err) {
                err.printStackTrace();
                fail("H5.H5Acreate: " + err);
            }

            /* Close the property list, and get the attribute's property list */
            H5.H5Pclose(plist_id);
            plist_id = H5.H5Aget_create_plist(attribute_id);
            assertTrue(plist_id > 0);

            /* Get the character encoding and ensure that it is the default (ASCII) */
            try {
                char_encoding = H5.H5Pget_char_encoding(plist_id);
            }
            catch (Throwable err) {
                err.printStackTrace();
                fail("H5Pget_char_encoding: " + err);
            }
            assertTrue("testH5Aget_create_plist: get_char_encoding", char_encoding == HDF5Constants.H5T_CSET_ASCII);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("testH5Aget_create_plist " + err);
        }
        finally {
            if (plist_id > 0)
                try {H5.H5Pclose(plist_id);} catch (Exception ex) {}
            if (attribute_id > 0)
                try {H5.H5Aclose(attribute_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aiterate() {
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;
        long attr3_id = HDF5Constants.H5I_INVALID_HID;
        long attr4_id = HDF5Constants.H5I_INVALID_HID;

        class idata {
            public String attr_name = null;
            idata(String name) {
                this.attr_name = name;
            }
        }
        class H5A_iter_data implements H5A_iterate_t {
            public ArrayList<idata> iterdata = new ArrayList<idata>();
        }
        H5A_iterate_t iter_data = new H5A_iter_data();
        class H5A_iter_callback implements H5A_iterate_cb {
            public int callback(long group, String name, H5A_info_t info, H5A_iterate_t op_data) {
                idata id = new idata(name);
                ((H5A_iter_data)op_data).iterdata.add(id);
                return 0;
            }
        }
        try {
            attr1_id = H5.H5Acreate_by_name(H5fid, ".", "attribute1",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(H5fid, ".", "attribute2",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr3_id = H5.H5Acreate_by_name(H5fid, ".", "attribute3",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr4_id = H5.H5Acreate_by_name(H5fid, ".", "attribute4",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            H5A_iterate_cb iter_cb = new H5A_iter_callback();
            try {
                H5.H5Aiterate(H5fid, HDF5Constants.H5_INDEX_CRT_ORDER, HDF5Constants.H5_ITER_INC, 0L, iter_cb, iter_data);
            }
            catch (Throwable err) {
                err.printStackTrace();
                fail("H5.H5Aiterate: " + err);
            }
            assertFalse("H5Aiterate ",((H5A_iter_data)iter_data).iterdata.isEmpty());
            assertTrue("H5Aiterate "+((H5A_iter_data)iter_data).iterdata.size(),((H5A_iter_data)iter_data).iterdata.size()==4);
            assertTrue("H5Aiterate "+(((H5A_iter_data)iter_data).iterdata.get(0)).attr_name,(((H5A_iter_data)iter_data).iterdata.get(0)).attr_name.compareToIgnoreCase("attribute1")==0);
            assertTrue("H5Aiterate "+(((H5A_iter_data)iter_data).iterdata.get(1)).attr_name,(((H5A_iter_data)iter_data).iterdata.get(1)).attr_name.compareToIgnoreCase("attribute2")==0);
            assertTrue("H5Aiterate "+((idata)((H5A_iter_data)iter_data).iterdata.get(2)).attr_name,(((H5A_iter_data)iter_data).iterdata.get(2)).attr_name.compareToIgnoreCase("attribute3")==0);
            assertTrue("H5Aiterate "+((idata)((H5A_iter_data)iter_data).iterdata.get(3)).attr_name,((idata)((H5A_iter_data)iter_data).iterdata.get(3)).attr_name.compareToIgnoreCase("attribute4")==0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("testH5Aiterate: " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
            if (attr3_id > 0)
                try {H5.H5Aclose(attr3_id);} catch (Exception ex) {}
            if (attr4_id > 0)
                try {H5.H5Aclose(attr4_id);} catch (Exception ex) {}
        }
    }

    @Test
    public void testH5Aiterate_by_name() {
        long attr1_id = HDF5Constants.H5I_INVALID_HID;
        long attr2_id = HDF5Constants.H5I_INVALID_HID;
        long attr3_id = HDF5Constants.H5I_INVALID_HID;
        long attr4_id = HDF5Constants.H5I_INVALID_HID;

        class idata {
            public String attr_name = null;
            idata(String name) {
                this.attr_name = name;
            }
        }
        class H5A_iter_data implements H5A_iterate_t {
            public ArrayList<idata> iterdata = new ArrayList<idata>();
        }
        H5A_iterate_t iter_data = new H5A_iter_data();
        class H5A_iter_callback implements H5A_iterate_cb {
            public int callback(long group, String name, H5A_info_t info, H5A_iterate_t op_data) {
                idata id = new idata(name);
                ((H5A_iter_data)op_data).iterdata.add(id);
                return 0;
            }
        }
        try {
            attr1_id = H5.H5Acreate_by_name(H5fid, ".", "attribute4",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr2_id = H5.H5Acreate_by_name(H5fid, ".", "attribute3",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr3_id = H5.H5Acreate_by_name(H5fid, ".", "attribute2",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            attr4_id = H5.H5Acreate_by_name(H5fid, ".", "attribute1",
                    type_id, space_id, HDF5Constants.H5P_DEFAULT,
                    HDF5Constants.H5P_DEFAULT, lapl_id);
            H5A_iterate_cb iter_cb = new H5A_iter_callback();
            try {
                H5.H5Aiterate_by_name(H5fid, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_INC, 0L, iter_cb, iter_data, HDF5Constants.H5P_DEFAULT);
            }
            catch (Throwable err) {
                err.printStackTrace();
                fail("H5.H5Aiterate_by_name: " + err);
            }
            assertFalse("H5Aiterate_by_name ",((H5A_iter_data)iter_data).iterdata.isEmpty());
            assertTrue("H5Aiterate_by_name "+((H5A_iter_data)iter_data).iterdata.size(),((H5A_iter_data)iter_data).iterdata.size()==4);
            assertTrue("H5Aiterate_by_name "+((idata)((H5A_iter_data)iter_data).iterdata.get(1)).attr_name,((idata)((H5A_iter_data)iter_data).iterdata.get(1)).attr_name.compareToIgnoreCase("attribute2")==0);
        }
        catch (Throwable err) {
            err.printStackTrace();
            fail("testH5Aiterate: " + err);
        }
        finally {
            if (attr1_id > 0)
                try {H5.H5Aclose(attr1_id);} catch (Exception ex) {}
            if (attr2_id > 0)
                try {H5.H5Aclose(attr2_id);} catch (Exception ex) {}
            if (attr3_id > 0)
                try {H5.H5Aclose(attr3_id);} catch (Exception ex) {}
            if (attr4_id > 0)
                try {H5.H5Aclose(attr4_id);} catch (Exception ex) {}
        }
    }

}



