Java Doc for Queue.java in  » Portal » stringbeans-3.5 » com » nabhinc » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » stringbeans 3.5 » com.nabhinc.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.nabhinc.util.Queue Queue public class Queue implements java.io.Serializable(Code) A helper class that implements a queue. author:    Padmanabh Dabke author:    (c) 2003 Nabh Information Systems, Inc. All Rights Reserved. Field Summary protected  boolean qClosed      Flag indicating whether this queue is open or has been closed. protected  QElement qFirst      protected  QElement qLast      protected  int qLength      Constructor Summary public   Queue()      public   Queue(java.io.Serializable o)      Create a queue with one element. Method Summary public synchronized  void addObject(java.io.Serializable o)      public synchronized  void addObject(java.io.Serializable o, int index)      public synchronized  void close()      Closes the queue and notifies all listeners. public synchronized  java.io.Serializable[] emptyQueue()      Empties the queue and returns all queue elements. public  int getLength()      Get the number of elements in the queue. public synchronized  java.io.Serializable[] getObjects()      Returns all objects in the queue without emptying it. public  boolean hasData()      Test if the queue has any elements. public  boolean isEmpty()      public  int persistObject(java.io.Serializable o)      public synchronized  java.io.Serializable removeObject()      Removes an element from the queue. public  java.io.Serializable removeObjectWithoutBlocking()      Removes an element from the queue. public synchronized  boolean waitForValue()      Waits till the queue has at least one value or the queue is closed. Field Detail qClosed protected boolean qClosed(Code) Flag indicating whether this queue is open or has been closed. qFirst protected QElement qFirst(Code) First element in the queue qLast protected QElement qLast(Code) Last element in the queue qLength protected int qLength(Code) Number of elements in the queue Constructor Detail Queue public Queue()(Code) Create an empty queue Queue public Queue(java.io.Serializable o)(Code) Create a queue with one element. Parameters:   o - The first element in the queue Method Detail addObject public synchronized void addObject(java.io.Serializable o)(Code) Add a new element to the queue Parameters:   o - Element to be added addObject public synchronized void addObject(java.io.Serializable o, int index)(Code) Adds a new element to the queue Parameters:   o - Element to be added close public synchronized void close()(Code) Closes the queue and notifies all listeners. emptyQueue public synchronized java.io.Serializable[] emptyQueue()(Code) Empties the queue and returns all queue elements. All objects in the queue getLength public int getLength()(Code) Get the number of elements in the queue. Queue length getObjects public synchronized java.io.Serializable[] getObjects()(Code) Returns all objects in the queue without emptying it. All objects in the queue hasData public boolean hasData()(Code) Test if the queue has any elements. true if the queue is not empty. isEmpty public boolean isEmpty()(Code) Test if the queue is empty true if the queue is empty persistObject public int persistObject(java.io.Serializable o) throws Exception(Code) Do nothing method Parameters:   o - Element to be added removeObject public synchronized java.io.Serializable removeObject() throws InterruptedException(Code) Removes an element from the queue. If the queue is empty, blocks until addObject notifies it. Removed element removeObjectWithoutBlocking public java.io.Serializable removeObjectWithoutBlocking() throws InterruptedException(Code) Removes an element from the queue. If the queue is empty, blocks until addObject notifies it. Removed element waitForValue public synchronized boolean waitForValue() throws InterruptedException(Code) Waits till the queue has at least one value or the queue is closed. true if the queue is non-empty, false if ithas been closed. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)