foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/unitofwork/GetObjectFromIdentityMapTest.java

/*
 * 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.unitofwork;

import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.expressions.ExpressionBuilder;
import org.eclipse.persistence.sessions.UnitOfWork;
import org.eclipse.persistence.testing.framework.TestCase;
import org.eclipse.persistence.testing.framework.TestErrorException;
import org.eclipse.persistence.testing.framework.TestProblemException;
import org.eclipse.persistence.testing.models.employee.domain.Employee;


/**
 * Bug 3287196
 * Ensure calling getFromIdentityMap(Object) on a UnitOfWork will go to the parent
 * session if the object is not found in the UnitOfWorkCache
 */
public class GetObjectFromIdentityMapTest extends TestCase {
    protected Expression expression = null;
    protected Employee employee = null;

    public GetObjectFromIdentityMapTest() {
        setDescription("Test UnitOfWorkIdentityMapAccessor to ensure it goes to the parent session to get objects not in the UOW cache..");
    }

    @Override
    public void setup() {
        getSession().getIdentityMapAccessor().initializeIdentityMaps();
        ExpressionBuilder employees = new ExpressionBuilder();
        employee = (Employee)getSession().readObject(Employee.class);
        if(employee == null) {
            throw new TestProblemException("No employees available");
        }
    }

    @Override
    public void test() {
        UnitOfWork uow = getSession().acquireUnitOfWork();
        employee = (Employee)uow.getIdentityMapAccessor().getFromIdentityMap(employee);
    }

    @Override
    public void verify() {
        if (employee == null) {
            throw new TestErrorException("UnitOfWork did not look in its parents cache for an object when calling getFromIdentityMap(Object)");
        }
    }

    @Override
    public void reset() {
        getSession().getIdentityMapAccessor().initializeIdentityMaps();
    }
}