Method queryComponents

src/model/Global.ts:592–627

* @return Never be null/undefined.

(condition: QueryConditionKindB)

     * @return Never be null/undefined.
     */
    queryComponents(condition: QueryConditionKindB): ComponentModel[] {
        const mainType = condition.mainType;
        if (!mainType) {
            return [];
        }

        const index = condition.index;
        const id = condition.id;
        const name = condition.name;
        const cmpts = this._componentsMap.get(mainType);

        if (!cmpts || !cmpts.length) {
            return [];
        }

        let result: ComponentModel[];

        if (index != null) {
            result = [];
            each(modelUtil.normalizeToArray(index), function (idx) {
                cmpts[idx] && result.push(cmpts[idx]);
            });
        }
        else if (id != null) {
            result = queryByIdOrName('id', id, cmpts);
        }
        else if (name != null) {
            result = queryByIdOrName('name', name, cmpts);
        }
        else {
            // Return all non-empty components in that mainType
            result = filter(cmpts, cmpt => !!cmpt);
        }

        return filterBySubType(result, condition);
    }

    /**
     * The interface is different from queryComponents,