foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/queries/inmemory/MemoryQueryForFunctionsAcrossOneToManyMapping.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 MemoryQueryForFunctionsAcrossOneToManyMapping extends TestCase {
    protected Employee employee;
    protected ReadAllQuery queryAll;
    protected ReadObjectQuery queryObject;
    protected java.util.Vector allEmployees;
    protected java.util.Vector employees;

    public MemoryQueryForFunctionsAcrossOneToManyMapping() {
        super();
    }

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

    @Override
    public void setup() {
        getSession().getIdentityMapAccessor().initializeAllIdentityMaps();
        allEmployees = new Vector();
        employees = new Vector();
        Vector phones = new Vector();
        Vector moreEmp = new Vector();
        Vector moreEmps = new Vector();
        Vector empVector = new Vector();
        Vector empVectors = new Vector();
        queryAll = new ReadAllQuery();
        queryAll.setReferenceClass(Employee.class);
        queryAll.setSelectionCriteria(new ExpressionBuilder().anyOf("managedEmployees").get("firstName").toUpperCase().equal("BOB"));
        getSession().removeQuery("getAllEmployees");
        getSession().addQuery("getAllEmployees", queryAll);
        allEmployees = (Vector)getSession().executeQuery("getAllEmployees");
        for (Enumeration enumtr = allEmployees.elements(); enumtr.hasMoreElements();) {
            phones = ((Employee)enumtr.nextElement()).getManagedEmployees();
            employees.addAll(phones);
            //trigger all the value holders of phoneNumbers
            for (Enumeration enum2 = employees.elements(); enum2.hasMoreElements();) {
                moreEmps = ((Employee)enum2.nextElement()).getManagedEmployees();
                empVector.addAll(moreEmps);
            }

            for (Enumeration enum3 = empVector.elements(); enum3.hasMoreElements();) {
                moreEmp = ((Employee)enum3.nextElement()).getManagedEmployees();
                empVectors.addAll(moreEmp);
            }
        }
    }

    @Override
    public void test() {
        //all the employees who have managed Employees with first name Bob 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.anyOf("managedEmployees").get("firstName").toUpperCase().equal("BOB");
        queryObject.setSelectionCriteria(exp);
        employee = (Employee)getSession().executeQuery(queryObject);

    }
}