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/*
 *
 *  * Copyright 2016 the original author or authors.
 *  *
 *  * Licensed 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 leap.lang;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public abstract class ExtensibleBase implements Extensible {

    protected final Map, Object> extensions = new ConcurrentHashMap<>();

    protected ExtensibleBase() {

    }

    protected ExtensibleBase(Map,Object> extensions) {
        this.putExtensions(extensions);
    }

    @Override
    public Map, Object> getExtensions() {
        return extensions;
    }

    @Override
    public final  T getExtension(Class type) {
        return (T)extensions.get(type);
    }

    @Override
    public final  void setExtension(Class type, Object extension) {
        extensions.put(type, extension);
    }

    @Override
    public  T removeExtension(Class type) {
        return (T)extensions.remove(type);
    }

    protected final void putExtensions(Map, Object> extensions) {
        if(null != extensions) {
            this.extensions.putAll(extensions);
        }
    }
}