com.github.methylene.args.predicate.Predicates Maven / Gradle / Ivy

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package com.github.methylene.args.predicate;

import com.github.methylene.args.Predicate;

import java.util.*;
import java.util.regex.Pattern;

public class Predicates {

  public static  Predicate is(final T test) {
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        return Objects.equals(test, arg);
      }
    };
  }

  public static  Predicate in(T... test) {
    return in(new HashSet(Arrays.asList(test)));
  }
  public static  Predicate in(final Set test) {
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        return test.contains(arg);
      }
    };
  }

  public static  Predicate or(Predicate... predicates) {
    return or(Arrays.asList(predicates));
  }

  public static  Predicate or(Predicate p0, Predicate p1) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    return or(predicates);
  }

  public static  Predicate or(Predicate p0, Predicate p1, Predicate p2) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    predicates.add(p2);
    return or(predicates);
  }

  public static  Predicate or(Predicate p0, Predicate p1, Predicate p2, Predicate p3) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    predicates.add(p2);
    predicates.add(p3);
    return or(predicates);
  }

  public static  Predicate and(Predicate p0, Predicate p1) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    return and(predicates);
  }

  public static  Predicate and(Predicate p0, Predicate p1, Predicate p2) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    predicates.add(p2);
    return and(predicates);
  }

  public static  Predicate and(Predicate p0, Predicate p1, Predicate p2, Predicate p3) {
    ArrayList> predicates = new ArrayList>(2);
    predicates.add(p0);
    predicates.add(p1);
    predicates.add(p2);
    predicates.add(p3);
    return and(predicates);
  }

  public static  Predicate and(Predicate... predicates) {
    return and(Arrays.asList(predicates));
  }

  public static  Predicate and(final Collection> predicates) {
    if (predicates.size() == 1)
      return predicates.iterator().next();
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        for (Predicate p : predicates)
          if (!p.matches(arg))
            return false;
        return true;
      }
    };
  }

  public static  Predicate or(final Collection> predicates) {
    if (predicates.size() == 1)
      return predicates.iterator().next();
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        for (Predicate p : predicates)
          if (p.matches(arg))
            return true;
        return false;
      }
    };
  }

  public static  Predicate nothing() {
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        return false;
      }
    };
  }

  public static  Predicate anything() {
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        return true;
      }
    };
  }

  public static  Predicate notNull() {
    return new Predicate() {
      @Override
      public boolean matches(T arg) {
        return arg != null;
      }
    };
  }


}