Package org.dbunit.util.concurrent

Class SynchronizedInt

java.lang.Object
org.dbunit.util.concurrent.SynchronizedVariable
org.dbunit.util.concurrent.SynchronizedInt
All Implemented Interfaces:
Cloneable, Comparable, Executor
public class SynchronizedInt extends SynchronizedVariable implements Comparable, Cloneable
A class useful for offloading synch for int instance variables.

[ Introduction to this package. ]

Since:
? (pre 2.1)
Version:
$Revision$ $Date$
Author:
Doug Lea, Last changed by: $Author$

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected int
    value_
    The current value.

    Fields inherited from class org.dbunit.util.concurrent.SynchronizedVariable

    lock_

  • Constructor Summary

    Constructors
    Constructor
    Description
    SynchronizedInt(int initialValue)
    Make a new SynchronizedInt with the given initial value, and using its own internal lock.
    SynchronizedInt(int initialValue, Object lock)
    Make a new SynchronizedInt with the given initial value, and using the supplied lock.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    add(int amount)
    Add amount to value (i.e., set value += amount)
    int
    and(int b)
    Set value to value & b.
    boolean
    commit(int assumedValue, int newValue)
    Set value to newValue only if it is currently assumedValue.
    int
    compareTo(int other)
    Compares the current value to the given int.
    int
    compareTo(Object other)
     
    int
    compareTo(SynchronizedInt other)
    Compares the current value to another SynchronizedInt's value.
    int
    complement()
    Set the value to its complement
    int
    decrement()
    Decrement the value.
    int
    divide(int factor)
    Divide value by factor (i.e., set value /= factor)
    boolean
    equals(Object other)
     
    final int
    get()
    Return the current value
    int
    hashCode()
     
    int
    increment()
    Increment the value.
    int
    multiply(int factor)
    Multiply value by factor (i.e., set value *= factor)
    int
    negate()
    Set the value to the negative of its old value
    int
    or(int b)
    Set value to value | b.
    int
    set(int newValue)
    Set to newValue.
    int
    subtract(int amount)
    Subtract amount from value (i.e., set value -= amount)
    int
    swap(SynchronizedInt other)
    Atomically swap values with another SynchronizedInt.
    String
    toString()
     
    int
    xor(int b)
    Set value to value ^ b.

    Methods inherited from class org.dbunit.util.concurrent.SynchronizedVariable

    execute, getLock

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Field Details

    • value_

      protected int value_
      The current value.

  • Constructor Details

    • SynchronizedInt

      public SynchronizedInt(int initialValue)
      Make a new SynchronizedInt with the given initial value, and using its own internal lock.
      Parameters:
      initialValue - the initial value.

    • SynchronizedInt

      public SynchronizedInt(int initialValue, Object lock)
      Make a new SynchronizedInt with the given initial value, and using the supplied lock.
      Parameters:
      initialValue - the initial value.
      lock - the synchronization lock to use.

  • Method Details

    • get

      public final int get()
      Return the current value
      Returns:
      the current value.

    • set

      public int set(int newValue)
      Set to newValue.
      Parameters:
      newValue - the new value.
      Returns:
      the old value

    • commit

      public boolean commit(int assumedValue, int newValue)
      Set value to newValue only if it is currently assumedValue.
      Parameters:
      assumedValue - the value the current value must equal for the update to happen.
      newValue - the new value.
      Returns:
      true if successful

    • swap

      public int swap(SynchronizedInt other)
      Atomically swap values with another SynchronizedInt. Uses identityHashCode to avoid deadlock when two SynchronizedInts attempt to simultaneously swap with each other. (Note: Ordering via identyHashCode is not strictly guaranteed by the language specification to return unique, orderable values, but in practice JVMs rely on them being unique.)
      Parameters:
      other - the SynchronizedInt to swap values with.
      Returns:
      the new value

    • increment

      public int increment()
      Increment the value.
      Returns:
      the new value

    • decrement

      public int decrement()
      Decrement the value.
      Returns:
      the new value

    • add

      public int add(int amount)
      Add amount to value (i.e., set value += amount)
      Parameters:
      amount - the amount to add.
      Returns:
      the new value

    • subtract

      public int subtract(int amount)
      Subtract amount from value (i.e., set value -= amount)
      Parameters:
      amount - the amount to subtract.
      Returns:
      the new value

    • multiply

      public int multiply(int factor)
      Multiply value by factor (i.e., set value *= factor)
      Parameters:
      factor - the factor to multiply by.
      Returns:
      the new value

    • divide

      public int divide(int factor)
      Divide value by factor (i.e., set value /= factor)
      Parameters:
      factor - the factor to divide by.
      Returns:
      the new value

    • negate

      public int negate()
      Set the value to the negative of its old value
      Returns:
      the new value

    • complement

      public int complement()
      Set the value to its complement
      Returns:
      the new value

    • and

      public int and(int b)
      Set value to value & b.
      Parameters:
      b - the value to AND with.
      Returns:
      the new value

    • or

      public int or(int b)
      Set value to value | b.
      Parameters:
      b - the value to OR with.
      Returns:
      the new value

    • xor

      public int xor(int b)
      Set value to value ^ b.
      Parameters:
      b - the value to XOR with.
      Returns:
      the new value

    • compareTo

      public int compareTo(int other)
      Compares the current value to the given int.
      Parameters:
      other - the value to compare against.
      Returns:
      a negative, zero, or positive integer as the current value is less than, equal to, or greater than other.

    • compareTo

      public int compareTo(SynchronizedInt other)
      Compares the current value to another SynchronizedInt's value.
      Parameters:
      other - the instance to compare against.
      Returns:
      a negative, zero, or positive integer as the current value is less than, equal to, or greater than other's value.

    • compareTo

      public int compareTo(Object other)
      Specified by:
      compareTo in interface Comparable

    • equals

      public boolean equals(Object other)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object