How can I use validation only for special numbers-CodePudding

I have entity :

@NotNull
@Column(name = "version")
private String version;

And I also need that the version should be only : 2,5,7,11 or 18.

If another, it will not valid for passing.

Example :

If the version equals 5, it is okay.

If the version equals 6, it is NOT okay.

How can I implement it?

CodePudding user response：

You can validate using @Pattern annotation. See this link. For your case:

import javax.validation.constraints.Pattern;  
@NotNull
@Column(name = "version")
@Pattern(regexp="^(2|5|7|11)$",message="Invalid Version")  
private String version;

This should work.

CodePudding user response：

You can write validation logic in setter methods.

public void setVersion(String version){
    if(version.equlas("2") || 
       version.equlas("5") || 
       version.equlas("7") || 
       version.equlas("11")|| 
       version.equlas("18")){ 
       this.version= version;
    }else{
        // do something that you want if value is NOT equal to 2,5,7,11 or 18.
    }
}

You can validate the value of the version in the service layer too. Or you can use a method to validate it or even a separate validator class. There are a lot of possibilities. It's all depends on your choice.