foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/queries/inmemory/MemoryQueryAcrossOneToOneMapping.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.queries.inmemory;

import java.util.Vector;
import java.util.Enumeration;

import org.eclipse.persistence.queries.*;
import org.eclipse.persistence.expressions.*;

import org.eclipse.persistence.testing.framework.*;
import org.eclipse.persistence.testing.models.employee.domain.*;

public class MemoryQueryAcrossOneToOneMapping extends TestCase {
    protected Employee employee;
    protected ReadAllQuery queryAll;
    protected ReadObjectQuery queryObject;
    protected java.util.Vector allEmployees;

    public MemoryQueryAcrossOneToOneMapping() {
        super();
    }

    @Override
    public void reset() {
        //clear the cache.
        getSession().getIdentityMapAccessor().initializeAllIdentityMaps();
    }

    @Override
    public void setup() {
        allEmployees = new Vector();
        queryAll = new ReadAllQuery();
        queryAll.setReferenceClass(Employee.class);
        queryAll.setSelectionCriteria(new ExpressionBuilder().get("address").get("city").greaterThan("Montreal"));
        getSession().removeQuery("getAllEmployees");
        getSession().addQuery("getAllEmployees", queryAll);
        allEmployees = (Vector)getSession().executeQuery("getAllEmployees");
        for (Enumeration enumtr = allEmployees.elements(); enumtr.hasMoreElements();) {
            ((Employee)enumtr.nextElement()).getAddress();
            //trigger all the value holders of addresses
        }
    }

    @Override
    public void test() {
        //all the employees with cities that come after Montreal should be
        //in the cache right now.
        queryObject = new ReadObjectQuery();
        queryObject.setReferenceClass(Employee.class);
        queryObject.checkCacheOnly();//read from cache only

        ExpressionBuilder bldr = new ExpressionBuilder();
        Expression exp = bldr.get("address").get("city").equal("Ottawa");
        queryObject.setSelectionCriteria(exp);
        employee = (Employee)getSession().executeQuery(queryObject);

    }

    @Override
    public void verify() {
        if (!allEmployees.contains(employee)) {
            throw new TestErrorException("Employee is not the same as the one in cache!");
        }
    }
}