exe
Class GAIGSqueue

java.lang.Object
  exe.GAIGSbase
      exe.GAIGSlist
          exe.GAIGSqueue

All Implemented Interfaces:

GAIGSdatastr

public class GAIGSqueue
extends GAIGSlist

GAIGSqueue extends the GAIGSlist class, providing the ability to implement a standard queue data structure and also create GAIGS visualizations of its state. Use the various constructors to specify the general parameters for the queue visualization, and use the toXML method to actually generate the queue XML for snapshots.

A method is also provided to set the presentation color of a queue cell. A default queue cell color can be set by using the appropriate constructor. Methods to get a cell color are inherited from GAIGSlist.

Field Summary

Fields inherited from interface exe.GAIGSdatastr

DEFAULT_COLOR, DEFAULT_FONT_SIZE, DEFAULT_NAME, DEFAULT_X1, DEFAULT_X2, DEFAULT_Y1, DEFAULT_Y2

Constructor Summary

GAIGSqueue()
Use all default values for instance variables

GAIGSqueue(java.lang.String name, java.lang.String color, double x1, double y1, double x2, double y2, double fontSize)
Explicitly set all instance variables.

Method Summary

java.lang.Object	dequeue() removes an item from the queue and returns it.
void	enqueue(java.lang.Object v) Adds an item to the queue.
void	enqueue(java.lang.Object v, java.lang.String c) Adds an item with an associated color to the queue.
java.lang.Object	peek() returns but does not remove an item from the queue.
java.lang.String	toXML() Creates and returns GAIGS XML code for the current state of the queue

Methods inherited from class exe.GAIGSlist

add, add, add, add, addFirst, addFirst, addLast, addLast, clear, contains, get, getColor, getFirst, getLast, indexOf, isEmpty, lastIndexOf, remove, remove, removeFirst, removeLast, set, set, setColor, size, toXML

Methods inherited from class exe.GAIGSbase

getName, setName

Methods inherited from class java.lang.Object

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

Constructor Detail

GAIGSqueue

public GAIGSqueue()

Use all default values for instance variables

GAIGSqueue

public GAIGSqueue(java.lang.String name,
                  java.lang.String color,
                  double x1,
                  double y1,
                  double x2,
                  double y2,
                  double fontSize)

Explicitly set all instance variables.

Parameters:

name - Display name of this structure.

color - Color for items unless locally overridden.

x1 - Left display bound.

y1 - Bottom display bound.

x2 - Top display bound.

y2 - Right display bound.

fontSize - Font size for display.

Method Detail

enqueue

public void enqueue(java.lang.Object v)

Adds an item to the queue. Default color will be used for this item.

Parameters:

v - The value to be stored.

enqueue

public void enqueue(java.lang.Object v,
                    java.lang.String c)

Adds an item with an associated color to the queue.

Parameters:

v - The value to be stored.

c - The display color for this item.

dequeue

public java.lang.Object dequeue()

removes an item from the queue and returns it.

Returns:

An Object containing popped value

peek

public java.lang.Object peek()

returns but does not remove an item from the queue.

Returns:

An Object containing the next value to be dequeued.

toXML

public java.lang.String toXML()

Creates and returns GAIGS XML code for the current state of the queue

Specified by:

toXML in interface GAIGSdatastr

Overrides:

toXML in class GAIGSlist

Returns:

A String containing GAIGS XML code for the queue