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   *   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
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   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
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   ****************************************************************/
  package org.apache.cayenne.di.spi;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import org.apache.cayenne.di.DIRuntimeException;
  import org.apache.cayenne.di.Provider;
  
  /**
   * @since 3.1
   */
  class MapProvider<T> implements Provider<Map<String, T>> {
  
  	private Map<String, Provider<? extends T>> providers;
  
  	public MapProvider() {
  		this.providers = new HashMap<>();
  	}
  
  	@Override
  	public Map<String, T> get() throws DIRuntimeException {
  		Map<String, T> map = new HashMap<>();
  
  		for (Entry<String, Provider<? extends T>> entry : providers.entrySet()) {
  			map.put(entry.getKey(), entry.getValue().get());
  		}
  
  		return map;
  	}
  
  	void put(String key, Provider<? extends T> provider) {
  		providers.put(key, provider);
  	}
  }
  