FactoryPattern.sol

pragma solidity >=0.4.22 <0.7.0;

contract Ownable {
    address owner;    

    constructor() public{
        owner = msg.sender;
    }
    
    modifier onlyOwner (){
        require(msg.sender==owner,"Must be owner");
        _;
    }
}

contract SecretVault {
    string secret;

    constructor(string memory _secret) public{
        secret = _secret;
    }
    
    function getSecret() public view returns(string memory){
        return secret;
    }
}

contract SecretContract is Ownable{
    address secretVault;

    constructor(string memory _secret) public{
        SecretVault _secretVault = new SecretVault(_secret);
        secretVault = address(_secretVault);
        super;
    }
    
    function getSecret() public view onlyOwner returns(string memory){
        SecretVault _secretVault = SecretVault(secretVault);
        return _secretVault.getSecret();
    }
}