package plan9.lib; //// client interface to factotum//// via Limbo version by Vita Nuova, MIT Licence//// Java version Copyright © 2012 Coraid Inc import java.lang.*;import plan9.lib.Strings; //// attribute//	Name:	attr//	Value:	attr=value//	Query:	attr?// attr starting ! is secret// public class Attr implements Comparable<Attr> { 	public static final int Name = 0;	public static final int Value = 1;	public static final int Query = 2; 	public int tag;	public String name;	public String val; 	public Attr(int tag, String name, String val){		this.tag = tag;		this.name = name;		this.val = val;	}	public Attr(String name, String val){		this.tag = Value;		this.name = name;		this.val = val == null? "": val;	}	public Attr(String name){		this.tag = Name;		this.name = name;		this.val = null;	} 	public Attr copy(){		return new Attr(tag, name, val);	}	public String toString(){		switch(tag){		case Name:	return name;		case Value:	return Strings.quote(name)+"="+Strings.quote(val);		case Query:	return Strings.quote(name)+"?";		default:	return "??";		}	}	public boolean isSecret(){		return name.charAt(0) == '!';	}	public boolean isPublic(){		return !isSecret();	} 	// public, but not yet sure whether to publish them	public boolean equals(Object o){		if(o == null || !(o instanceof Attr))			return false;		if(o == this)			return true;		Attr a = (Attr)o;		if(!(a.tag == tag && a.name.equals(name)))			return false;		if(val == null)			return a.val == null;		if(a.val == null)			return val == null;		return a.val.equals(val);	}	public int hashCode(){		if(val == null)			return tag ^ name.hashCode();		return tag ^ name.hashCode() ^ val.hashCode();	}	public int compareTo(Attr a){		// tag doesn't matter		if(!name.equals(a.name))			return name.compareTo(a.name);		if(val == null)			return a.val == null? 0: 1;		if(a.val == null)			return 1;		return val.compareTo(a.val);	}}