/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.cxf.bus.extension;

import java.util.concurrent.ConcurrentHashMap;

public class DeferredMap<V> extends ConcurrentHashMap<String, V> {

    ExtensionManager em;
    Class<V> type;

    public DeferredMap(ExtensionManagerImpl em, Class<V> type) {
        this.em = em;
        
        this.type = type;
    }
    
    public void undefer() {
        em.activateAll();
    }
    

    @Override
    public V get(Object key) {
        // TODO Auto-generated method stub
        V v = super.get(key);

        if (v == null) {
            String k = (String)key;
            em.activateViaNS(k);

            v = em.getExtension(k, type);
            if (v != null) {
                put(k, v);
            }
        }

        return v;
    }
}
