/**

* 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 31, 2008 */

package clojure.lang;

public class AReference implements IReference {

private IPersistentMap _meta;

public AReference() {

this(null);

}

public AReference(IPersistentMap meta) {

_meta = meta;

}

synchronized public IPersistentMap meta() {

return _meta;

}

synchronized public IPersistentMap alterMeta(IFn alter, ISeq args) {

_meta = (IPersistentMap) alter.applyTo(new Cons(_meta, args));

return _meta;

}

synchronized public IPersistentMap resetMeta(IPersistentMap m) {

_meta = m;

return m;

}

}