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Data model for Contract

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package org.seekay.contract.model.tools;

import java.util.Map;

public class MapTools {

  /**
   * Private constructor for utility class
   */
  private MapTools() {
    throw new IllegalStateException("Utility classes should never be constructed");
  }

  public static boolean isSubMap(Map subMap, Map superMap) {
    if(subMap == null || subMap.isEmpty()) {
      return true;
    }
    for(Map.Entry subMapEntry : subMap.entrySet()) {
      if(!containsEntry(subMapEntry, superMap)) {
        return false;
      }
    }
    return true;
  }

  public static boolean containsEntry(Map.Entry entry, Map map) {
    return map.containsKey(entry.getKey()) && map.get(entry.getKey()).equals(entry.getValue());
  }
}