com.github.krukow.clj_lang.AFunction Maven / Gradle / Ivy

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/**
 *   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 com.github.krukow.clj_lang;

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

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

public IPersistentMap meta(){
	return null;
}

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

		public IPersistentMap meta(){
			return meta;
		}

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

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

public int compare(Object o1, Object o2){
	try
		{
		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();
		}
	catch(Exception e)
		{
		throw Util.sneakyThrow(e);
		}
}
}