org.dcs.query_process

Class Script_Engine.ListCounter

java.lang.Object

org.dcs.query_process.Script_Engine.ListCounter

Enclosing class:

Script_Engine

protected static class Script_Engine.ListCounter
extends java.lang.Object

This class stores a list with the current search position in the list.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	counter Stores the current position in the list
protected java.util.ArrayList<Script_Event>	entityList List of script elements to process in order

Constructor Summary

Constructors

Constructor and Description
ListCounter(java.util.ArrayList<Script_Event> thisEntityList) Create a new instance of ListCounter.

Method Summary

Modifier and Type	Method and Description
protected boolean	backTrack() Backtrack to the previous element.
protected boolean	endOfList() End of list of counter past the last list element.
protected Script_Event	getParent() Get the parent script element of the last indexed element.
protected boolean	isEmpty() Is empty if there are no elements in the list.
protected Script_Event	nextElement(boolean pop) Get the next indexed element in the list.

Methods inherited from class java.lang.Object

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

Field Detail

counter

protected int counter

Stores the current position in the list

entityList

protected java.util.ArrayList<Script_Event> entityList

List of script elements to process in order

Constructor Detail

ListCounter

public ListCounter(java.util.ArrayList<Script_Event> thisEntityList)

Create a new instance of ListCounter.

Parameters:

thisEntityList - the list of script elements to process.

Method Detail

isEmpty

protected boolean isEmpty()

Is empty if there are no elements in the list.

Returns:

true if no elements in the list.

endOfList

protected boolean endOfList()

End of list of counter past the last list element.

Returns:

true if counter larger than last list element position.

backTrack

protected boolean backTrack()

Backtrack to the previous element. Decrement the counter by 1.

Returns:

true if OK, false if before start of list, (counter < 0).

nextElement

protected Script_Event nextElement(boolean pop)

Get the next indexed element in the list.

Parameters:

pop - if true permanently update the counter to the next element. If false only look for the next element.

Returns:

the next indexed script element.

getParent

protected Script_Event getParent()

Get the parent script element of the last indexed element.

Returns:

the parent element or null if the base element.