net.sf.staccatocommons.lang.predicate.internal.Equals2 Maven / Gradle / Ivy

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/**
 *  Copyright (c) 2011, The Staccato-Commons Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; version 3 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 */

package net.sf.staccatocommons.lang.predicate.internal;

import net.sf.staccatocommons.defs.NullSafe;
import net.sf.staccatocommons.defs.predicate.Predicate;
import net.sf.staccatocommons.defs.predicate.Predicate2;
import net.sf.staccatocommons.lang.predicate.Predicates;
import net.sf.staccatocommons.restrictions.Constant;

/**
 * @author flbulgarelli
 * 
 * @param 
 */
@NullSafe
public final class Equals2 extends TopLevelPredicate2 {
  private static final long serialVersionUID = -5196215375584803443L;

  public boolean eval(A arg0, A arg1) {
    return arg0.equals(arg1);
  }

  public Predicate apply(A arg) {
    if (arg == null)
      return Predicates.null_();
    return Predicates.equal(arg);
  }

  /**
   * @return a constant instance
   */
  @Constant
  public static  Predicate2 equalTest() {
    return new Equals2();
  }
}