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/*
 * Licensed to The OpenNMS Group, Inc (TOG) under one or more
 * contributor license agreements.  See the LICENSE.md file
 * distributed with this work for additional information
 * regarding copyright ownership.
 *
 * TOG licenses this file to You under the GNU Affero General
 * Public License Version 3 (the "License") or (at your option)
 * any later version.  You may not use this file except in
 * compliance with the License.  You may obtain a copy of the
 * License at:
 *
 *      https://www.gnu.org/licenses/agpl-3.0.txt
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied.  See the License for the specific
 * language governing permissions and limitations under the
 * License.
 */
package org.opennms.netmgt.model;

import java.io.Serializable;
import java.util.Date;
import java.util.Objects;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.UniqueConstraint;

import com.google.common.base.MoreObjects;

/**
 *  Entity to store situations and their associated (related) alarms with other details like mappedTime 
 */
@Entity
@Table(name = "alarm_situations", uniqueConstraints={@UniqueConstraint(columnNames={"situation_id", "related_alarm_id"})})
public class AlarmAssociation implements Serializable {

    private static final long serialVersionUID = 4115687014888009683L;

    private Integer id;

    private OnmsAlarm situationAlarm;

    private OnmsAlarm relatedAlarm;

    private Date mappedTime;

    public AlarmAssociation() {
    }

    public AlarmAssociation(OnmsAlarm situationAlarm, OnmsAlarm relatedAlarm) {
        this(situationAlarm, relatedAlarm, new Date());
    }

    public AlarmAssociation(OnmsAlarm situationAlarm, OnmsAlarm relatedAlarm, Date mappedTime) {
        this.mappedTime = mappedTime;
        this.situationAlarm = situationAlarm;
        this.relatedAlarm = relatedAlarm;
    }

    @Id
    @SequenceGenerator(name="alarmSequence", sequenceName="alarmsNxtId")
    @GeneratedValue(generator="alarmSequence")
    @Column(name="id", nullable=false)
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @ManyToOne
    @JoinColumn(name = "situation_id")
    public OnmsAlarm getSituationAlarm() {
        return situationAlarm;
    }

    public void setSituationAlarm(OnmsAlarm situationAlarm) {
        this.situationAlarm = situationAlarm;
    }

    @OneToOne
    @JoinColumn(name = "related_alarm_id")
    public OnmsAlarm getRelatedAlarm() {
        return relatedAlarm;
    }

    public void setRelatedAlarm(OnmsAlarm relatedAlarm) {
        this.relatedAlarm = relatedAlarm;
    }


    public void setMappedTime(Date mappedTime) {
        this.mappedTime = mappedTime;
    }

    @Column(name = "mapped_time")
    @Temporal(TemporalType.TIMESTAMP)
    public Date getMappedTime() {
        return mappedTime;
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
                .add("situation", getSituationAlarm().getId())
                .add("alarm", getRelatedAlarm().getId())
                .add("time", getMappedTime())
                .toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        AlarmAssociation that = (AlarmAssociation) o;
        return Objects.equals(situationAlarm, that.situationAlarm) &&
                Objects.equals(relatedAlarm, that.relatedAlarm);
    }

    @Override
    public int hashCode() {
        return Objects.hash(situationAlarm, relatedAlarm);
    }
}