/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.jbpm.task;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collections;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;

import org.jbpm.task.utils.CollectionUtils;

@Entity
@SequenceGenerator(name="escalationIdSeq", sequenceName="ESCALATION_ID_SEQ", allocationSize=1)
public class Escalation implements Externalizable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO, generator="escalationIdSeq")
    private long                    id;

    private String                  name;

    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "Escalation_Constraints_Id", nullable = true)
    private List<BooleanExpression> constraints   = Collections.emptyList();

    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "Escalation_Notifications_Id", nullable = true)
    private List<Notification>      notifications = Collections.emptyList();

    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "Escalation_Reassignments_Id", nullable = true)
    private List<Reassignment>      reassignments = Collections.emptyList();
    
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeLong(  id );
        
        if ( name != null ) {
            out.writeBoolean( true );
            out.writeUTF( name );
        } else {
            out.writeBoolean( false );
        }
        CollectionUtils.writeBooleanExpressionList( constraints, out );
        CollectionUtils.writeNotificationList( notifications, out );
        CollectionUtils.writeReassignmentList( reassignments, out );        
    }
    
    public void readExternal(ObjectInput in) throws IOException,
                                            ClassNotFoundException {
       id = in.readLong();
       if ( in.readBoolean() ) {
           name = in.readUTF();
       }
       constraints = CollectionUtils.readBooleanExpressionList( in );
       notifications = CollectionUtils.readNotificationList( in );
       reassignments = CollectionUtils.readReassignmentList( in );
        
    }

    public long getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<BooleanExpression> getConstraints() {
        return constraints;
    }

    public void setConstraints(List<BooleanExpression> constraints) {
        this.constraints = constraints;
    }

    public List<Notification> getNotifications() {
        return notifications;
    }

    public void setNotifications(List<Notification> notifications) {
        this.notifications = notifications;
    }

    public List<Reassignment> getReassignments() {
        return reassignments;
    }

    public void setReassignments(List<Reassignment> reassignments) {
        this.reassignments = reassignments;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + CollectionUtils.hashCode( constraints );
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + CollectionUtils.hashCode( notifications );
        result = prime * result + CollectionUtils.hashCode( reassignments );
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if ( this == obj ) return true;
        if ( obj == null ) return false;
        if ( !(obj instanceof Escalation) ) return false;
        Escalation other = (Escalation) obj;

        if ( name == null ) {
            if ( other.name != null ) return false;
        } else if ( !name.equals( other.name ) ) return false;

        return CollectionUtils.equals( constraints,
                                       other.constraints ) && CollectionUtils.equals( notifications,
                                                                                      other.notifications ) && CollectionUtils.equals( reassignments,
                                                                                                                                       other.reassignments );

    }

}
