class Role {
    beginTokenIndex:number;
    length: number;
    name: string;
    isPredicate: boolean;

    constructor(beginTokenIndex: number, length: number, name: string, isPredicate: boolean) {
        this.beginTokenIndex = beginTokenIndex;

        this.length = length;

        this.name = name;

        this.isPredicate = isPredicate;
        Object.freeze(this);
    }

    static parseHypergraph(json: [number, number, string], isPredicate: boolean) {
        return new Role(json[0],json[1]-json[0],json[2], isPredicate);
    }

    static parseJson(json: [number, number, string], isPredicate: boolean) {
        return new Role(json[0],json[1]-json[0],json[2], isPredicate);
    }

    static toHypergraphJson(role:Role):[number,number,string] {
        return [role.beginTokenIndex, role.beginTokenIndex + role.length, role.name];
    }

    static toJson(role:Role):[number,number,string] {
        return [role.beginTokenIndex, role.beginTokenIndex + role.length, role.name];
    }

    static isDisjoint(begin1: number, length1: number, begin2:number, length2:number):boolean {
        const end1 = begin1 + length1;
        const end2 = begin2 + length2;
        if(end1 <= begin2) return true;
        if(end2 <= begin1) return true;
        return false;
    }
}

export default Role;