/*
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * Copyright 2012-2018 the original author or authors.
 */
package org.assertj.core.presentation;

import static java.util.Objects.requireNonNull;
import static org.assertj.core.util.Objects.HASH_CODE_PRIME;
import static org.assertj.core.util.Objects.areEqual;
import static org.assertj.core.util.Objects.hashCodeFor;

import java.util.function.Predicate;

/**
 * Encapsulate a {@link Predicate} description to be able to control how it is formatted in error messages using a
 * {@link Representation}.
 * <p>
 * Immutable class.
 */
public class PredicateDescription {
  private static final String DEFAULT = "given";
  public static final PredicateDescription GIVEN = new PredicateDescription(DEFAULT);

  // can be public as it is immutable, never null
  public final String description;

  /**
   * Build a {@link PredicateDescription}.
   *
   * @param description must not be null
   */
  public PredicateDescription(String description) {
	requireNonNull(description, "The predicate description must not be null");
	this.description = description;
  }

  public boolean isDefault() {
	return DEFAULT.equals(description);
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }

    if (obj == null || getClass() != obj.getClass()) {
      return false;
    }
    PredicateDescription description = (PredicateDescription) obj;
    return areEqual(this.description, description.description);
  }

  @Override
  public int hashCode() {
    return HASH_CODE_PRIME * hashCodeFor(description);
  }
}
