Package org.apache.fop.util

Class CompareUtil

java.lang.Object
org.apache.fop.util.CompareUtil
public final class CompareUtil extends Object
A utility class that provides helper methods for implementing equals and hashCode.

  • Method Details

    • equal

      public static boolean equal(Object o1, Object o2)
      Compares two objects for equality. In order to prevent lock-ordering deadlocks the following strategy is used: when two non null objects are passed to the method, the comparison is done by calling the Object.equals(Object) method of the object with the lower hash code (System.identityHashCode(Object)); in the rare case that two different objects have the same hash code, a lock is used.
      Parameters:
      o1 - an object
      o2 - another object
      Returns:
      true if either o1 and o2 are null or if o1.equals(o2)

    • getHashCode

      public static int getHashCode(Object object)
      Returns the hash code of the given object.
      Parameters:
      object - an object
      Returns:
      object.hashCode(), or 0 if object is null

    • equal

      public static boolean equal(double n1, double n2)
      Compares two numbers for equality. Uses the same comparison algorithm as the Double.equals(Object) method.
      Parameters:
      n1 - a number
      n2 - another number
      Returns:
      true if the two numbers are equal, false otherwise

    • getHashCode

      public static int getHashCode(double number)
      Returns a hash code for the given number. Applies the same algorithm as the Double.hashCode() method.
      Parameters:
      number - a number
      Returns:
      a hash code for that number