/*
 * @(#)MockAttributeSet.java	1.7 00/02/02
 *
 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */
package javax.swing.text.rtf;

import java.util.Dictionary;
import java.util.Enumeration;
import javax.swing.text.AttributeSet;
import javax.swing.text.MutableAttributeSet;


/* This AttributeSet is made entirely out of tofu and Ritz Crackers
   and yet has a remarkably attribute-set-like interface! */
class MockAttributeSet
    implements AttributeSet, MutableAttributeSet
{
    public Dictionary backing;

    public boolean isEmpty()
    {
         return backing.isEmpty();
    }
    
    public int getAttributeCount()
    {
         return backing.size();
    }

    public boolean isDefined(Object name)
    {
         return ( backing.get(name) ) != null;
    }

    public boolean isEqual(AttributeSet attr)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    public AttributeSet copyAttributes()
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }
    
    public Object getAttribute(Object name)
    {
        return backing.get(name);
    }

    public void addAttribute(Object name, Object value)
    {
        backing.put(name, value);
    }
    
    public void addAttributes(AttributeSet attr)
    {
        Enumeration as = attr.getAttributeNames();
	while(as.hasMoreElements()) {
	    Object el = as.nextElement();
	    backing.put(el, attr.getAttribute(el));
	}
    }

    public void removeAttribute(Object name)
    {
        backing.remove(name);
    }

    public void removeAttributes(AttributeSet attr)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    public void removeAttributes(Enumeration en)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    public void setResolveParent(AttributeSet pp)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    
    public Enumeration getAttributeNames()
    {
         return backing.keys();
    }
    
    public boolean containsAttribute(Object name, Object value)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    public boolean containsAttributes(AttributeSet attr)
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }

    public AttributeSet getResolveParent()
    {
         throw new InternalError("MockAttributeSet: charade revealed!");
    }
}