myhw3.data

Interface Inventory

All Superinterfaces:

java.lang.Iterable<Record>

All Known Implementing Classes:

InventorySet

public interface Inventory
extends java.lang.Iterable<Record>

A collection of Records. Records can only be created and destroyed using the Inventory.

See Also:

Data

Method Summary

Modifier and Type	Method and Description
Record	get(Video v) Return the record for a given Video; if not present, return null.
java.util.Iterator<Record>	iterator() Return an iterator over Records in the Inventory.
java.util.Iterator<Record>	iterator(java.util.Comparator<Record> comparator) Return an iterator over the Inventory, sorted accoring the Comparator.
boolean	redo() Undo the last successful UndoableCommand.
int	size() Return the number of Records.
java.lang.String	toString() Returns the inventory as a string; one record per line.
boolean	undo() Undo the last successful UndoableCommand.

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

size

int size()

Return the number of Records.

get

Record get(Video v)

Return the record for a given Video; if not present, return null.

iterator

java.util.Iterator<Record> iterator()

Return an iterator over Records in the Inventory.

The iterator returns objects that implement the Record interface.

Any attempt to remove objects using the iterator should result in an UnsupportedOperationException.

The Record order is unspecified

Specified by:

iterator in interface java.lang.Iterable<Record>

iterator

java.util.Iterator<Record> iterator(java.util.Comparator<Record> comparator)

Return an iterator over the Inventory, sorted accoring the Comparator.

The iterator returns objects that implement the Record interface.

Any attempt to remove objects using the iterator should result in an UnsupportedOperationException.

The iteration order is determined by the comparator (least first).

The comparator may assume that its arguments implement Record.

Parameters:

comparator - determines the order of the records returned.

toString

java.lang.String toString()

Returns the inventory as a string; one record per line.

Overrides:

toString in class java.lang.Object

undo

boolean undo()

Undo the last successful UndoableCommand.

redo

boolean redo()

Undo the last successful UndoableCommand.