// Copyright 2000-2005 the Contributors, as shown in the revision logs.
// Licensed under the Apache Public Source License 2.0 ("the License").
// You may not use this file except in compliance with the License.

package org.ibex.js;

// FEATURE: cache JSSubProperties.Sub
public abstract class JSSubProperties extends JS.Immutable {
    protected static final JS SUBPROPERTY = new JS.Immutable();
    public abstract JS _get(JS key) throws JSExn;
    public final JS get(JS key) throws JSExn {
        JS ret = _get(key);
        return ret==SUBPROPERTY ? new Sub(key) : ret;
    }
    private class Sub extends JS.Immutable {
        final JS key;
        Sub(JS key) { this.key = key; }
        public void put(JS key, JS val) throws JSExn {
            JSSubProperties.this.put(JSU.S(JSU.toString(this.key) + "." + JSU.toString(key)), val); }
        public JS get(JS key) throws JSExn {
            return JSSubProperties.this.get(JSU.S(JSU.toString(this.key) + "." + JSU.toString(key))); }
        public JS call(JS method, JS[] args) throws JSExn {
            return JSSubProperties.this.call(JSU.S(JSU.toString(this.key) + "." + JSU.toString(method)), args); }
    }
}