How to set null object in properties file groovy?

I am trying to set a object value to null in properties file but it is always being returned as string. Here is the sample code along with the properties file.

File propertiesFile = new File('/opt/config.properties')

propertiesFile.withInputStream {

    properties.load(it)

}



    **config.properties**

    spotConfig = null



println properties.spotConfig

But when I am trying to print the above value, it is always returning string whereas I want it to print a null object. How can I do that in groovy? Any help appreciated!

asked Nov 20 '18 at 5:16

user_dev

3972522

add a comment |

I am trying to set a object value to null in properties file but it is always being returned as string. Here is the sample code along with the properties file.

File propertiesFile = new File('/opt/config.properties')

propertiesFile.withInputStream {

    properties.load(it)

}



    **config.properties**

    spotConfig = null



println properties.spotConfig

But when I am trying to print the above value, it is always returning string whereas I want it to print a null object. How can I do that in groovy? Any help appreciated!

asked Nov 20 '18 at 5:16

user_dev

3972522

add a comment |

I am trying to set a object value to null in properties file but it is always being returned as string. Here is the sample code along with the properties file.

File propertiesFile = new File('/opt/config.properties')

propertiesFile.withInputStream {

    properties.load(it)

}



    **config.properties**

    spotConfig = null



println properties.spotConfig

But when I am trying to print the above value, it is always returning string whereas I want it to print a null object. How can I do that in groovy? Any help appreciated!

asked Nov 20 '18 at 5:16

user_dev

3972522

I am trying to set a object value to null in properties file but it is always being returned as string. Here is the sample code along with the properties file.

File propertiesFile = new File('/opt/config.properties')

propertiesFile.withInputStream {

    properties.load(it)

}



    **config.properties**

    spotConfig = null



println properties.spotConfig

But when I am trying to print the above value, it is always returning string whereas I want it to print a null object. How can I do that in groovy? Any help appreciated!

amazon-web-services jenkins amazon-ec2 groovy

asked Nov 20 '18 at 5:16

user_dev

3972522

asked Nov 20 '18 at 5:16

user_dev

3972522

asked Nov 20 '18 at 5:16

user_dev

3972522

asked Nov 20 '18 at 5:16

user_dev

3972522

asked Nov 20 '18 at 5:16

user_dev

3972522

add a comment |

2 Answers
2

active

oldest

votes

There is no concept of explicitly assigning null in a properties file. The closest you can get is an empty string as you can read here.

spotConfig

Or you can simply not specify the key at all.

answered Nov 20 '18 at 5:29

Michael

1,1961712

add a comment |

Properties keys and values are strings. So you can't get a null as value from a Properties instance containing that key.

In both of these cases, the value will be returned as a string:

x=

y=null

properties.get("x") will return "", and properties.get("y") will return "null" (the literal string).

What you have to do is propbably remove the key from the file altogether (don't add a spotConfig key in the file) to get null

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

There is no concept of explicitly assigning null in a properties file. The closest you can get is an empty string as you can read here.

spotConfig

Or you can simply not specify the key at all.

answered Nov 20 '18 at 5:29

Michael

1,1961712

add a comment |

There is no concept of explicitly assigning null in a properties file. The closest you can get is an empty string as you can read here.

spotConfig

Or you can simply not specify the key at all.

answered Nov 20 '18 at 5:29

Michael

1,1961712

add a comment |

There is no concept of explicitly assigning null in a properties file. The closest you can get is an empty string as you can read here.

spotConfig

Or you can simply not specify the key at all.

answered Nov 20 '18 at 5:29

Michael

1,1961712

There is no concept of explicitly assigning null in a properties file. The closest you can get is an empty string as you can read here.

spotConfig

Or you can simply not specify the key at all.

answered Nov 20 '18 at 5:29

Michael

1,1961712

answered Nov 20 '18 at 5:29

Michael

1,1961712

answered Nov 20 '18 at 5:29

Michael

1,1961712

answered Nov 20 '18 at 5:29

Michael

1,1961712

add a comment |

Properties keys and values are strings. So you can't get a null as value from a Properties instance containing that key.

In both of these cases, the value will be returned as a string:

x=

y=null

properties.get("x") will return "", and properties.get("y") will return "null" (the literal string).

What you have to do is propbably remove the key from the file altogether (don't add a spotConfig key in the file) to get null

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

add a comment |

Properties keys and values are strings. So you can't get a null as value from a Properties instance containing that key.

In both of these cases, the value will be returned as a string:

x=

y=null

properties.get("x") will return "", and properties.get("y") will return "null" (the literal string).

What you have to do is propbably remove the key from the file altogether (don't add a spotConfig key in the file) to get null

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

add a comment |

Properties keys and values are strings. So you can't get a null as value from a Properties instance containing that key.

In both of these cases, the value will be returned as a string:

x=

y=null

properties.get("x") will return "", and properties.get("y") will return "null" (the literal string).

What you have to do is propbably remove the key from the file altogether (don't add a spotConfig key in the file) to get null

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

Properties keys and values are strings. So you can't get a null as value from a Properties instance containing that key.

In both of these cases, the value will be returned as a string:

x=

y=null

properties.get("x") will return "", and properties.get("y") will return "null" (the literal string).

What you have to do is propbably remove the key from the file altogether (don't add a spotConfig key in the file) to get null

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

answered Nov 20 '18 at 5:29

ernest_k

20.7k42344

add a comment |

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