@Override public boolean equals(final Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (this.getClass() != obj.getClass()) { return false; } final Room other = (Room) obj; if (this.property == null) { if (other.property != null) { return false; } } else if (!this.property.equals(other.property)) { return false; } if (this.getSize() != other.getSize()) { return false; } if (this.getType() != other.getType()) { return false; } return true; }