'use strict';
const PluralAttribute = require('./PluralAttribute');
/**
* @alias metamodel.SetAttribute
* @extends metamodel.PluralAttribute
*/
class SetAttribute extends PluralAttribute {
/**
* Get the type id for this set type
* @return {string}
*/
static get ref() {
return '/db/collection.Set';
}
/**
* @inheritDoc
* @type PluralAttribute.CollectionType
*/
get collectionType() {
return PluralAttribute.CollectionType.SET;
}
/**
* @param {string} name
* @param {metamodel.Type} elementType
* @param {Object=} flags
*/
constructor(name, elementType, flags) {
super(name, elementType, flags);
this.typeConstructor = Set;
}
/**
* @inheritDoc
*/
getJsonValue(state, object, options) {
const value = this.getValue(object);
if (!(value instanceof this.typeConstructor)) {
return null;
}
const persisting = {};
const persistedState = PluralAttribute.getAttachedState(value) || {};
let changed = PluralAttribute.getAttachedSize(value) !== value.size;
const json = [];
const iter = value.values();
for (let item = iter.next(); !item.done; item = iter.next()) {
const el = item.value;
const jsonValue = this.elementType.toJsonValue(state, el, options);
json.push(jsonValue);
persisting[jsonValue] = el;
changed = changed || persistedState[jsonValue] !== el;
}
if (options.persisting) {
PluralAttribute.attachState(value, persisting);
PluralAttribute.attachSize(value, value.size);
}
if (state.isPersistent && changed) {
state.setDirty();
}
return json;
}
/**
* @inheritDoc
*/
setJsonValue(state, obj, json, options) {
let value = null;
if (json) {
value = this.getValue(obj);
if (!(value instanceof this.typeConstructor)) {
value = new this.typeConstructor(); // eslint-disable-line new-cap
}
const persisting = {};
const persistedState = PluralAttribute.getAttachedState(value) || {};
value.clear();
for (let i = 0, len = json.length; i < len; i += 1) {
const jsonValue = json[i];
const id = jsonValue && jsonValue.id ? jsonValue.id : jsonValue;
const el = this.elementType.fromJsonValue(state, jsonValue, persistedState[id], options);
value.add(el);
persisting[id] = el;
}
if (options.persisting) {
PluralAttribute.attachState(value, persisting);
PluralAttribute.attachSize(value, value.size);
}
}
this.setValue(obj, value);
}
/**
* @inheritDoc
*/
toJSON() {
return Object.assign({}, super.toJSON(), {
type: SetAttribute.ref + '[' + this.elementType.ref + ']',
});
}
}
module.exports = SetAttribute;