| /* |
| * Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.testing.tests.queries; |
| |
| import java.util.*; |
| |
| import org.eclipse.persistence.queries.*; |
| import org.eclipse.persistence.expressions.*; |
| |
| import org.eclipse.persistence.testing.framework.*; |
| import org.eclipse.persistence.testing.models.employee.domain.*; |
| |
| /** |
| * CR#4139 |
| * Test use of next and previous with ScrollableCursors |
| */ |
| public class ScrollableCursorBackwardReadingTest extends TestCase { |
| protected boolean useConforming = false; |
| ConformingTestConfiguration configuration = null; |
| |
| protected boolean cursorSuccess = false; |
| protected Exception caughtException = null; |
| Vector readWithNext = null; |
| Vector readWithPrevious = null; |
| |
| protected boolean TYPE_SCROLL_INSENSITIVE_isSupported; |
| protected boolean CONCUR_UPDATABLE_isSupported; |
| |
| public ScrollableCursorBackwardReadingTest() { |
| setDescription("This test verifies that the number of objects read in from the end of a scrollable cursor to the start" + |
| " matches the number of object read in using a normal query"); |
| } |
| |
| public ScrollableCursorBackwardReadingTest(boolean useConforming) { |
| this(); |
| if (useConforming) { |
| setName("ScrollableCursorBackwardReadingConformingTest"); |
| this.useConforming = useConforming; |
| this.configuration = new ConformingTestConfiguration(); |
| } |
| } |
| |
| @Override |
| protected void setup() { |
| if (getSession().getPlatform().isDB2() || getSession().getPlatform().isAccess() || |
| getSession().getPlatform().isTimesTen() || getSession().getPlatform().isHANA()) { |
| throw new TestWarningException("ScrollableCursor is not supported on this platform"); |
| } |
| TYPE_SCROLL_INSENSITIVE_isSupported = true; |
| CONCUR_UPDATABLE_isSupported = true; |
| if(getSession().getPlatform().isSQLServer()) { |
| // In case either TYPE_SCROLL_INSENSITIVE or CONCUR_UPDATABLE used |
| // MS SQL Server Version: 9.00.2050; MS SQL Server 2005 JDBC Driver Version: 1.2.2828.100 throws exception: |
| // com.microsoft.sqlserver.jdbc.SQLServerException: The cursor type/concurrency combination is not supported. |
| TYPE_SCROLL_INSENSITIVE_isSupported = false; |
| CONCUR_UPDATABLE_isSupported = false; |
| } |
| if(getSession().getPlatform().isSymfoware()) { |
| // Symfoware supports updatable cursors, but considers SQL queries |
| // that select from multiple tables as non-updatable, thus raising |
| // an exception for this test. |
| CONCUR_UPDATABLE_isSupported = false; |
| } |
| readWithNext = new Vector(); |
| readWithPrevious = new Vector(); |
| getSession().getIdentityMapAccessor().initializeAllIdentityMaps(); |
| |
| if (configuration != null) { |
| configuration.setup(getSession()); |
| getExecutor().setSession(configuration.getUnitOfWork()); |
| } |
| } |
| |
| @Override |
| public void test() { |
| |
| ReadAllQuery query = new ReadAllQuery(); |
| ScrollableCursor cursor = null; |
| |
| try { |
| query.setReferenceClass(Employee.class); |
| if(TYPE_SCROLL_INSENSITIVE_isSupported && CONCUR_UPDATABLE_isSupported) { |
| query.useScrollableCursor(2); |
| } else { |
| ScrollableCursorPolicy policy = new ScrollableCursorPolicy(); |
| if(!TYPE_SCROLL_INSENSITIVE_isSupported) { |
| policy.setResultSetType(ScrollableCursorPolicy.TYPE_SCROLL_SENSITIVE); |
| } |
| if(!CONCUR_UPDATABLE_isSupported) { |
| policy.setResultSetConcurrency(ScrollableCursorPolicy.CONCUR_READ_ONLY); |
| } |
| policy.setPageSize(2); |
| query.useScrollableCursor(policy); |
| } |
| // |
| if (configuration != null) { |
| ExpressionBuilder builder = new ExpressionBuilder(); |
| Expression exp = builder.get("salary").greaterThan(50000); |
| query.setSelectionCriteria(exp); |
| query.conformResultsInUnitOfWork(); |
| } |
| cursor = (ScrollableCursor)getSession().executeQuery(query); |
| |
| try { |
| // test to see if we can iterate through a list and then iterate |
| // in reverse through the same list. |
| int totalItems = 0; |
| while (cursor.hasNext()) { |
| readWithNext.addElement(cursor.next()); |
| totalItems++; |
| } |
| while (cursor.hasPrevious()) { |
| readWithPrevious.addElement(cursor.previous()); |
| totalItems--; |
| } |
| |
| cursorSuccess = (totalItems == 0); |
| |
| int size = readWithPrevious.size(); |
| for (int i = 0; i < readWithNext.size(); i++) { |
| cursorSuccess = |
| (cursorSuccess && (readWithNext.elementAt(i) == readWithPrevious.elementAt((size - 1) - |
| i))); |
| } |
| |
| } catch (org.eclipse.persistence.exceptions.QueryException ex) { |
| caughtException = ex; |
| } |
| |
| } finally { |
| if (cursor != null) { |
| cursor.close(); |
| } |
| } |
| } |
| |
| @Override |
| public void reset() { |
| |
| if (configuration != null) { |
| getExecutor().setSession(configuration.getUnitOfWork().getParent()); |
| configuration.reset(); |
| } |
| getSession().getIdentityMapAccessor().initializeIdentityMaps(); |
| } |
| |
| @Override |
| protected void verify() { |
| if (caughtException != null) { |
| throw new TestErrorException("Cursor navigation caused a QueryException.", caughtException); |
| } |
| if (!cursorSuccess) { |
| throw new TestErrorException("Cursor navigation failed. Either next() or previous is not " + |
| "returning the correct result."); |
| } |
| } |
| } |