/*
 * 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.changeflag.model;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import java.io.Serializable;
import java.io.StringWriter;

import java.math.BigDecimal;

import org.eclipse.persistence.descriptors.changetracking.ChangeTracker;
import org.eclipse.persistence.descriptors.changetracking.CollectionChangeEvent;


/**
 * <p><b>Purpose</b>: Represent a employee of an organization.
 * <p><b>Description</b>: An Employee is a root object in the Employee Demo.
 * It maintains relationships to all of the other objects in the system.
 * The employee shows usage of 1-1, 1-m, m-m, aggregate and transformation mappings.
 * The employee also shows usage of value holder to implement indirection for its relationships
 * (note, it is strongly suggested to always use value holders for relationships).
 */
public class ALCTEmployee implements Serializable, ChangeTracker {
    // implements ChangeTracker for testing

    /** Primary key, maped as a direct-to-field, BigDecimal -{@literal >} NUMBER, that makes use of sequence numbers to generate the id. */
    public BigDecimal id;

    /** Direct-to-field mapping, String -{@literal >} VARCHAR. */
    public String firstName;

    /** Direct-to-field mapping, String -{@literal >} VARCHAR. */
    public String lastName;

    /** Object-type mapping, maps "Male" -{@literal >} "M", "Female" -{@literal >} "F". */
    public String gender;

    /** Aggregate-object mapping, stores the object in the employee's table. */
    public ALCTEmploymentPeriod period;

    public PropertyChangeListener listener;

    @Override
    public PropertyChangeListener _persistence_getPropertyChangeListener() {
        return listener;
    }

    @Override
    public void _persistence_setPropertyChangeListener(PropertyChangeListener listener) {
        this.listener = listener;
    }

    public void propertyChange(String propertyName, Object oldValue, Object newValue) {
        if (listener != null) {
            if (oldValue != newValue) {
                listener.propertyChange(new PropertyChangeEvent(this, propertyName, oldValue, newValue));
            }
        }
    }

    public void collectionChange(String propertyName, Object oldValue, Object newValue, int changeType, boolean isChangeApplied) {
        if (listener != null) {
            listener.propertyChange(new CollectionChangeEvent(this, propertyName, oldValue, newValue, changeType, isChangeApplied));
        }
    }

    /**
     * For fields that make use of indirection the constructor should build the value holders.
     */
    public ALCTEmployee() {
        this.firstName = "";
        this.lastName = "";
    }

    public String getFirstName() {
        return firstName;
    }

    public String getGender() {
        return gender;
    }

    /**
     * Return the persistent identifier of the receiver.
     */
    public BigDecimal getId() {
        return id;
    }

    public String getLastName() {
        return lastName;
    }

    public ALCTEmploymentPeriod getPeriod() {
        return period;
    }

    public void setFemale() {
        propertyChange("gender", this.gender, "Female");
        setGender("Female");
    }

    public void setFirstName(String firstName) {
        propertyChange("firstName", getFirstName(), firstName);
        this.firstName = firstName;
    }

    public void setGender(String gender) {
        propertyChange("gender", this.gender, gender);
        this.gender = gender;
    }

    /**
     * Set the persistent identifier of the receiver.
     * Note this should never be changed.
     * Consider making the primary key set methods protected or not having them.
     * In this demo the setId is required for testing purposes.
     */
    public void setId(BigDecimal id) {
        propertyChange("id", this.id, id);
        this.id = id;
    }

    public void setLastName(String lastName) {
        propertyChange("lastName", this.lastName, lastName);
        this.lastName = lastName;
    }

    public void setMale() {
        propertyChange("gender", this.gender, "Male");
        setGender("Male");
    }

    public void setPeriod(ALCTEmploymentPeriod period) {
        propertyChange("period", this.period, period);
        this.period = period;
    }

    /**
     * Print the first &amp; last name
     */
    public String toString() {
        StringWriter writer = new StringWriter();

        writer.write("Employee: ");
        writer.write(getFirstName());
        writer.write(" ");
        writer.write(getLastName());
        return writer.toString();
    }
}