com.github.dakusui.crest.utils.printable.PrintablePredicate Maven / Gradle / Ivy

Go to download
package com.github.dakusui.crest.utils.printable;

import java.util.function.Predicate;

import static java.lang.String.format;
import static java.util.Objects.requireNonNull;

public class PrintablePredicate implements Predicate {
  final Predicate predicate;
  final String               s;

  public PrintablePredicate(String s, Predicate predicate) {
    this.predicate = requireNonNull(predicate);
    this.s = requireNonNull(s);
  }

  @Override
  public boolean test(T t) {
    return predicate.test(t);
  }

  @Override
  public Predicate and(Predicate other) {
    requireNonNull(other);
    return new PrintablePredicate(format("(%s&&%s)", s, other), t -> predicate.test(t) && other.test(t));
  }

  @Override
  public Predicate negate() {
    return new PrintablePredicate<>(String.format("!%s", s), predicate.negate());
  }

  @Override
  public Predicate or(Predicate other) {
    requireNonNull(other);
    return new PrintablePredicate(format("(%s||%s)", s, other), t -> predicate.test(t) || other.test(t));
  }

  @Override
  public String toString() {
    return s;
  }
}