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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2013-2014 Amazon Technologies, Inc.
 *
 * 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://aws.amazon.com/apache2.0
 *
 * This file 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 com.amazonaws.services.dynamodbv2.datamodeling;

import java.util.Collection;
import java.util.Map;
import java.util.Set;

/**
 * A Map with some secret extra sauce that can be used to tunnel
 * extra data through a method signature that only takes a Map.
 *
 * @param  the type of the map's keys
 * @param  the type of the map's values
 * @param  the type of the extra secret sauce
 */
final class MapAnd implements Map {

    private final Map map;
    private final T extra;
    
    public static  MapAnd wrap(
            final Map map,
            final T extra) {
        
        return new MapAnd(map, extra);
    }
    
    private MapAnd(final Map map, final T extra) {
        this.map = map;
        this.extra = extra;
    }
    
    public Map unwrap() {
        return map;
    }
    
    public T getExtra() {
        return extra;
    }
    
    @Override
    public void clear() {
        map.clear();
    }

    @Override
    public boolean containsKey(Object arg0) {
        return map.containsKey(arg0);
    }

    @Override
    public boolean containsValue(Object arg0) {
        return map.containsValue(arg0);
    }

    @Override
    public Set> entrySet() {
        return map.entrySet();
    }

    @Override
    public V get(Object arg0) {
        return map.get(arg0);
    }

    @Override
    public boolean isEmpty() {
        return map.isEmpty();
    }

    @Override
    public Set keySet() {
        return map.keySet();
    }

    @Override
    public V put(K arg0, V arg1) {
        return map.put(arg0, arg1);
    }

    @Override
    public void putAll(Map arg0) {
        map.putAll(arg0);
    }

    @Override
    public V remove(Object arg0) {
        return map.remove(arg0);
    }

    @Override
    public int size() {
        return map.size();
    }

    @Override
    public Collection values() {
        return map.values();
    }

    @Override
    public String toString() {
        return "{map: " + map + ", extra: " + extra + "}";
    }
}