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java.lang.Object | +--edu.kzoo.grid.ArrayListGrid.ArrayListGridRep
Internal representation for an ArrayList-based
implementation of a Grid class.
| Constructor Summary | |
protected |
ArrayListGrid.ArrayListGridRep(Grid.ValidityChecker checker)
Constructs an empty ArrayListGridRep representation of a grid. |
| Method Summary | |
void |
add(GridObject obj)
Adds a new object to this internal grid representation at the location it specifies. |
GridObject[] |
allObjects()
Returns all the objects in this grid. |
protected int |
indexOf(Location loc)
Get the index of the object at the specified location. |
boolean |
isValid(Location loc)
Verifies whether a location is valid in this grid. |
int |
numObjects()
Returns the number of objects in this grid. |
GridObject |
objectAt(Location loc)
Returns the object at a specific location in this grid. |
void |
remove(GridObject obj)
Removes the object from this internal grid representation. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
protected ArrayListGrid.ArrayListGridRep(Grid.ValidityChecker checker)
checker - an object that knows how to check the validity
of a location in a grid| Method Detail |
public boolean isValid(Location loc)
isValid in interface Grid.InternalRepresentationloc - location to check
true if loc is valid;
false otherwisepublic int numObjects()
numObjects in interface Grid.InternalRepresentationpublic GridObject[] allObjects()
allObjects in interface Grid.InternalRepresentationpublic GridObject objectAt(Location loc)
objectAt in interface Grid.InternalRepresentationloc - the location in which to look
loc;
null if loc is not
in the grid or is emptypublic void add(GridObject obj)
obj.grid() is this grid and
obj.location() is a valid empty location;
verified by the Grid object.)
add in interface Grid.InternalRepresentationobj - the new object to be addedpublic void remove(GridObject obj)
obj is in this grid; verified
by the Grid object.)
remove in interface Grid.InternalRepresentationobj - the object to be removedprotected int indexOf(Location loc)
loc - the location in which to look
loc
if there is one; -1 otherwise
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