Package org.apache.jackrabbit.oak.commons

Class LongUtils

  • public final class LongUtils
extends java.lang.Object

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static long calculateExpirationTime​(long expiration)
      Calculate an expiration time based on new Date().getTime() and the specified expiration in number of milliseconds.
      static long safeAdd​(long a, long b)
      Sums a and b and verifies that it doesn't overflow in signed long arithmetic, in which case Long.MAX_VALUE will be returned instead of the result.
      static java.lang.Long tryParse​(java.lang.String string)
      Parses the specified string as a signed decimal long value.

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • safeAdd

        public static long safeAdd​(long a,
                           long b)
        Sums a and b and verifies that it doesn't overflow in signed long arithmetic, in which case Long.MAX_VALUE will be returned instead of the result. Note: this method is a variant of LongMath.checkedAdd(long, long) that returns Long.MAX_VALUE instead of throwing ArithmeticException.
        See Also:
        LongMath.checkedAdd(long, long)

      • calculateExpirationTime

        public static long calculateExpirationTime​(long expiration)
        Calculate an expiration time based on new Date().getTime() and the specified expiration in number of milliseconds.
        Parameters:
        expiration - The expiration in milliseconds.
        Returns:
        The expiration time.

      • tryParse

        public static java.lang.Long tryParse​(java.lang.String string)
        Parses the specified string as a signed decimal long value. Unlike Long.parseLong(String), this method returns null instead of throwing an exception if parsing fails. This can be significantly more efficient when the string to be parsed is often invalid, as raising an exception is an expensive operation.

        This is a simplified version of Longs.tryParse() in Guava. This version is hardcoded to only support radix 10.

        See Also:
        Longs.tryParse(String)