import { Property } from './Property';

export enum RemoveConstraint {

    /*
     * When the source Entity is removed also the target
     * Entity is removed but if and only if the latter has no other
     * incoming Relation.
     */
    cascadeWhenOrphan,

    /*
     * When the source Entity is removed also the target
     * Entity is removed.
     */
    cascade,

    /*
     * When the source Entity is removed the target Entity
     * is keep.
     */
    keep

}

export enum AddConstraint {

    propagate,

    unpropagate

}

export class PropagationConstraint extends Property {

    remove: RemoveConstraint;
    add: AddConstraint;

    constructor(remove: RemoveConstraint, add: AddConstraint){
        super();
        this.remove = remove;
        this.add = add;
    }

}