Implementa métodos para poder comparar modelos

	public void setParent(String parent) {

		this.parent = parent;

	}

	@Override

	public int hashCode() {

		final int prime = 31;

		int result = 1;

		result = prime * result + ((name == null) ? 0 : name.hashCode());

		result = prime * result + ((parent == null) ? 0 : parent.hashCode());

		return result;

	}

	@Override

	public boolean equals(Object obj) {

		if (this == obj)

			return true;

		if (obj == null)

			return false;

		if (getClass() != obj.getClass())

			return false;

		JoinIndex other = (JoinIndex) obj;

		if (name == null) {

			if (other.name != null)

				return false;

		} else if (!name.equals(other.name))

			return false;

		if (parent == null) {

			if (other.parent != null)

				return false;

		} else if (!parent.equals(other.parent))

			return false;

		return true;

	}

}