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49 lines
1.1 KiB
TypeScript
49 lines
1.1 KiB
TypeScript
import { Property } from './Property';
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type RemoveConstraint = 'cascadeWhenOrphan' | 'cascade' | 'keep';
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export const RemoveConstraint = {
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/*
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* When the source Entity is removed also the target
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* Entity is removed but if and only if the latter has no other
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* incoming Relation.
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*/
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cascadeWhenOrphan: 'cascadeWhenOrphan' as RemoveConstraint,
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/*
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* When the source Entity is removed also the target
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* Entity is removed. */
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cascade: 'cascade' as RemoveConstraint,
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/*
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* When the source Entity is removed the target Entity
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* is keep.
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*/
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keep: 'keep' as RemoveConstraint
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};
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type AddConstraint = 'propagate' | 'unpropagate';
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export const AddConstraint = {
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propagate: 'propagate' as AddConstraint,
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unpropagate: 'unpropagate' as AddConstraint
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};
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export class PropagationConstraint extends Property {
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remove: RemoveConstraint;
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add: AddConstraint;
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constructor(remove: RemoveConstraint, add: AddConstraint) {
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super();
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this.remove = remove;
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this.add = add;
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}
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}
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