lib-utils-ts/src/utils/Predication.ts

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import {predicate, predicateFn} from "../Interface";
import {Optional} from "./Optional";
import {Objects} from "../type/Objects";
import {Deprecate} from "../annotation/Deprecate";
/****
 * @package lib-utils-ts.src
 * @class Predication
 * @interface predicate<T>
 */
export class Predication<T> implements predicate<T>{

    @Deprecate.Deprecated
    public test: predicateFn<T>;
    /***
     *
     * @param other
     */
    public and?( other :  predicate<T> ) : predicate<T>{
        Objects.requireNotNull(other,"Predication [ other ] argument is null !");
        let predication: predicateFn<T> = (value)=> this.test(value)&& Optional.ofNullable<predicateFn<T>>(other.test).orElse(()=>false).call(other,value);

        return new class extends Predication<T> implements predicate<T>{
            /**@override**/
            public test: predicateFn<T> = predication;
        };
    }
    /***
     *
     * @param other
     */
    public or?( other : predicate<T> ) : predicate<T>{
        Objects.requireNotNull(other,"Predication [ other ] argument is null !");
        let predication :  predicateFn<T> = (value:T) => this.test(value)||Optional.ofNullable<predicateFn<T>>(other.test).orElse(()=>false).call(other,value);

        return new class extends Predication<T> implements predicate<T>{
            /**@override**/
            public test: predicateFn<T> = predication;
        }
    }
    /***
     *
     */
    public negate?(): predicate<T> {return Predication.of<T>((value:T)=> !this.test(value));}
    /***
     * @method isEqual
     * @param object
     */
    public static isEqual<T>(object: Object): predicate<T> {
        let p: predicate<T> = new Predication();
        p.test = object===null? Objects.isNull : (value:T)=> value.equals(object);
        return p;
    }
    /***
     * @static of
     * @param test
     */
    public static of<T>( test: predicateFn<T>|Predication<T> ): predicate<T> {
        if(test instanceof Predication) return test;
        return new class Predicate<T> extends Predication<T> implements predicate<T>{
            /**@ts-ignore**/
            public test: predicateFn<T> =  test;
        };
    }
}
Object.package(this);