Class Objects

src/main/java/org/assertj/core/internal/Objects.java:60–759

Reusable assertions for Objects. @author Yvonne Wang @author Alex Ruiz @author Nicolas François @author Mikhail Mazursky

 * @author Mikhail Mazursky
 */
public class Objects {

  private static final Objects INSTANCE = new Objects();
  @VisibleForTesting
  final PropertySupport propertySupport = PropertySupport.instance();
  private final ComparisonStrategy comparisonStrategy;
  @VisibleForTesting
  Failures failures = Failures.instance();
  private final FieldSupport fieldSupport = FieldSupport.comparison();

  /**
   * Returns the singleton instance of this class based on {@link StandardComparisonStrategy}.
   * 
   * @return the singleton instance of this class based on {@link StandardComparisonStrategy}.
   */
  public static Objects instance() {
	return INSTANCE;
  }

  @VisibleForTesting
  Objects() {
	this(StandardComparisonStrategy.instance());
  }

  public Objects(ComparisonStrategy comparisonStrategy) {
	this.comparisonStrategy = comparisonStrategy;
  }

  @VisibleForTesting
  public Comparator<?> getComparator() {
	return comparisonStrategy instanceof ComparatorBasedComparisonStrategy ?
	    ((ComparatorBasedComparisonStrategy) comparisonStrategy).getComparator() : null;
  }

  @VisibleForTesting
  public ComparisonStrategy getComparisonStrategy() {
	return comparisonStrategy;
  }

  /**
   * Verifies that the given object is an instance of the given type.
   *
   * @param info contains information about the assertion.
   * @param actual the given object.
   * @param type the type to check the given object against.
   * @throws NullPointerException if the given type is {@code null}.
   * @throws AssertionError if the given object is {@code null}.
   * @throws AssertionError if the given object is not an instance of the given type.
   */
  public void assertIsInstanceOf(AssertionInfo info, Object actual, Class<?> type) {
	if (!isInstanceOfClass(actual, type, info)) throw failures.failure(info, shouldBeInstance(actual, type));
  }

  /**
   * Verifies that the given object is an instance of any of the given types.
   *
   * @param info contains information about the assertion.
   * @param actual the given object.