/* Author: Jeff Dalton <J.Dalton@ed.ac.uk>
 * Updated: Mon May  7 18:37:19 2001 by Jeff Dalton
 * Copyright: (c) 2001, AIAI, University of Edinburgh
 */

package ix.util.context;

import java.util.*;

/**
 * An object that contains a single context-dependent value.
 */
public class ContextValue {

    ContextHolder holder;
    ContextLink link;

    public ContextValue(Object value) {
	this(Context.getContextHolder(),
	     value);
    }

    public ContextValue(ContextHolder holder, Object value) {
	this.holder = holder;
	this.link = new ContextLink(holder.getContext(), value);
    }

    public Object get() {
	return Context.getInContext(link, holder.getContext());
    }

    public void set(Object new_value) {
	Context.setInContext(link, holder.getContext(), new_value);
    }

}