Package org.apache.qpid.protonj2.engine.util

Class DeliveryIdTracker

java.lang.Object

java.lang.Number

org.apache.qpid.protonj2.engine.util.DeliveryIdTracker

All Implemented Interfaces:

Serializable, Comparable<DeliveryIdTracker>

public class DeliveryIdTracker
extends Number
implements Comparable<DeliveryIdTracker>

Tracker of Delivery ID values, implements a sequence number and provides ability to keep an not set state for use when allowing for set / not set tracking.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
DeliveryIdTracker()	Create a new Delivery Id tracker with initial state.
DeliveryIdTracker(int startValue)	Create a new Delivery Id tracker with initial state.

Method Summary

Modifier and Type	Method	Description
int	compareTo(int other)	Compares the tracked delivery id value to the int given, if no value is being tracked this method returns -1.
int	compareTo(Number other)	Compares the tracked delivery id value to the Number given, if no value is being tracked this method returns -1.
int	compareTo(DeliveryIdTracker other)
double	doubleValue()
boolean	equals(int other)	Performs an unsigned comparison between the value being tracked and the integer value passed, if no id is currently being tracked then this method returns false.
boolean	equals(Object other)
float	floatValue()
int	hashCode()
int	intValue()
boolean	isEmpty()
long	longValue()
void	reset()	Clears the tracked value and marks this tracker as empty.
void	set(int value)	Sets the current delivery ID value for this DeliveryIdTracker
String	toString()
UnsignedInteger	toUnsignedInteger()

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Constructor Detail

DeliveryIdTracker

public DeliveryIdTracker()

Create a new Delivery Id tracker with initial state.

DeliveryIdTracker

public DeliveryIdTracker(int startValue)

Create a new Delivery Id tracker with initial state.

Parameters:

startValue - The initial value to assign this tracker.

Method Detail

set

public void set(int value)

Sets the current delivery ID value for this DeliveryIdTracker

Parameters:

value - The new value to assign as the delivery ID.

reset

public void reset()

Clears the tracked value and marks this tracker as empty.

isEmpty

public boolean isEmpty()

Returns:

true if the tracker is not currently tracking a delivery Id.

compareTo

public int compareTo(Number other)

Compares the tracked delivery id value to the Number given, if no value is being tracked this method returns -1. This method returns 0 if the tracked id is equal to the value provided, value less than 0 if the tracked id is less than the provided value; and a value greater than 0 if the tracked id is larger than the value provided.

Parameters:

other - The Number to compare the tracked id with.

Returns:

the result of comparing the tracked id to the provided number.

compareTo

public int compareTo(int other)

Compares the tracked delivery id value to the int given, if no value is being tracked this method returns -1. This method returns 0 if the tracked id is equal to the value provided, value less than 0 if the tracked id is less than the provided value; and a value greater than 0 if the tracked id is larger than the value provided.

Parameters:

other - The primitive Integer to compare the tracked id with.

Returns:

the result of comparing the tracked id to the provided primitive integer value.

compareTo

public int compareTo(DeliveryIdTracker other)

Specified by:

compareTo in interface Comparable<DeliveryIdTracker>

intValue

public int intValue()

Specified by:

intValue in class Number

longValue

public long longValue()

Specified by:

longValue in class Number

floatValue

public float floatValue()

Specified by:

floatValue in class Number

doubleValue

public double doubleValue()

Specified by:

doubleValue in class Number

equals

public boolean equals(Object other)

Overrides:

equals in class Object

equals

public boolean equals(int other)

Performs an unsigned comparison between the value being tracked and the integer value passed, if no id is currently being tracked then this method returns false.

Parameters:

other - The value to compare to the currently tracked id.

Returns:

true if the tracked delivery id matches the integer value provided.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toUnsignedInteger

public UnsignedInteger toUnsignedInteger()

Returns:

an UnsignedInteger view of the tracked delivery id, or null if not tracking at this time.

toString

public String toString()

Overrides:

toString in class Object