/**
 *   Copyright (c) Rich Hickey. All rights reserved.
 *   The use and distribution terms for this software are covered by the
 *   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
 *   which can be found in the file epl-v10.html at the root of this distribution.
 *   By using this software in any fashion, you are agreeing to be bound by
 * 	 the terms of this license.
 *   You must not remove this notice, or any other, from this software.
 **/

/* rich Dec 16, 2008 */

package clojure.lang;

import java.io.Serializable;
import java.util.Comparator;

public abstract class AFunction extends AFn implements IObj, Comparator, Fn, Serializable {

private static final long serialVersionUID = 4469383498184457675L;

public volatile MethodImplCache __methodImplCache;

public IPersistentMap meta(){
	return null;
}

public IObj withMeta(final IPersistentMap meta){
	if(meta == null)
		return this;
	return new RestFn(){
		protected Object doInvoke(Object args) {
			return AFunction.this.applyTo((ISeq) args);
		}

		public IPersistentMap meta(){
			return meta;
		}

		public IObj withMeta(IPersistentMap newMeta){
			if(meta == newMeta)
				return this;
			return AFunction.this.withMeta(newMeta);
		}

		public int getRequiredArity(){
			return 0;
		}
	};
}

public int compare(Object o1, Object o2){
        Object o = invoke(o1, o2);

        if(o instanceof Boolean)
                {
                if(RT.booleanCast(o))
                        return -1;
                return RT.booleanCast(invoke(o2,o1))? 1 : 0;
                }

        Number n = (Number) o;
        return n.intValue();
}
}