Example KeyValueStoreKey representation to handle keys for various NoSQL stores.

KeyValueStoreKey.java

public class KeyValueStoreKey {

  protected Object family;
  protected Object key;

  public KeyValueStoreKey() {
  }

  public KeyValueStoreKey(Object family, Object key) {
    this.family = family;
    this.key = key;
  }

  public Object getFamily() {
    return family;
  }

  public void setFamily(Object family) {
    this.family = family;
  }

  public Object getKey() {
    return key;
  }

  public void setKey(Object key) {
    this.key = key;
  }

  @Override
  public String toString() {
    if (null == family && null == key) {
      return super.toString();
    } else {
      return (null != family ? family.toString() : "") + ":" + (null != key ? key.toString() : "");
    }
  }
}