com.zebra.rfid.api3

Class Queue

java.lang.Object

com.zebra.rfid.api3.Queue

public class Queue
extends java.lang.Object

Queue: implements a simple queue mechanism. Allows for enumeration of the elements.

Constructor Summary

Constructors

Constructor and Description
Queue()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	dequeue() Dequeue the oldest object on the queue.
java.lang.Object	dequeue(long timeOut) Dequeue the oldest object on the queue.
void	dump(java.lang.String msg)
java.util.Enumeration	elements() Returns an enumeration of the elements in Last-In, First-Out order.
void	enqueue(java.lang.Object obj) Enqueue an object.
boolean	isEmpty() Is the queue empty?
java.util.Enumeration	reverseElements() Returns an enumeration of the elements in First-In, First-Out order.

Methods inherited from class java.lang.Object

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

Constructor Detail

Queue

public Queue()

Method Detail

enqueue

public void enqueue(java.lang.Object obj)

Enqueue an object.

dequeue

public java.lang.Object dequeue()
                         throws java.lang.InterruptedException

Dequeue the oldest object on the queue. Will wait indefinitely.

Returns:

the oldest object on the queue.

Throws:

java.lang.InterruptedException - if any thread has interrupted this thread.

dequeue

public java.lang.Object dequeue(long timeOut)
                         throws java.lang.InterruptedException

Dequeue the oldest object on the queue.

Parameters:

timeOut - the number of milliseconds to wait for something to arrive.

Returns:

the oldest object on the queue.

Throws:

java.lang.InterruptedException - if any thread has interrupted this thread.

isEmpty

public boolean isEmpty()

Is the queue empty?

Returns:

true if the queue is empty.

elements

public final java.util.Enumeration elements()

Returns an enumeration of the elements in Last-In, First-Out order. Use the Enumeration methods on the returned object to fetch the elements sequentially.

reverseElements

public final java.util.Enumeration reverseElements()

Returns an enumeration of the elements in First-In, First-Out order. Use the Enumeration methods on the returned object to fetch the elements sequentially.

dump

public void dump(java.lang.String msg)