net.cscott.jutil
Interface Environment<K,V>

All Superinterfaces:

Map<K,V>

All Known Implementing Classes:

HashEnvironment, PersistentEnvironment

public interface Environment<K,V>
extends Map<K,V>

An Environment is a Map with scoping: you can save marks into the environment and undo all changes since a mark.

Version:

$Id: Environment.java,v 1.2 2006-10-30 19:58:05 cananian Exp $

Author:

C. Scott Ananian

Nested Class Summary

static interface

Environment.Mark A abstract property for marks into an environment.

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Method Summary

Environment.Mark	getMark() Get a mark that will allow you to restore the current state of this environment.
void	undoToMark(Environment.Mark m) Undo all changes since the supplied mark, restoring the map to its state at the time the mark was taken.

Methods inherited from interface java.util.Map

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Method Detail

getMark

Environment.Mark getMark()

Get a mark that will allow you to restore the current state of this environment.

undoToMark

void undoToMark(Environment.Mark m)

Undo all changes since the supplied mark, restoring the map to its state at the time the mark was taken. The undoToMark() operation must be repeatable.