CODEWITHSUNDEEP
javaspringvalidation
bazsoja
bazsoja

Reputation: 85

Spring conditional property validation

Is it possible to use the spring property validation based on another property value?

I can't use the @ConditionalOnProperty because the property is used in a lot of places. I can't just put the @ConditionalOnProperty for each bean.

Here is what I have:

@ConfigurationProperties
public class Property1 {
    boolean property2Enabled
}

@ConfigurationProperties
public class Property2 {
    @NotNull
    @Size(min = 1)
    String thisShouldBeValidated;

}

In this case the validation for thisShouldBeValidated should be applied only if the value of property2Enabled is true.

Is it possible to do this with some spring annotation? If I write a custom validation can I somehow get the value of the property2Enabled if that?

Upvotes: 0

Views: 3724

Answers (1)

AchillesVan
AchillesVan

Reputation: 4356

Try the Spring 4 @Conditional annotation that can be applied to @Bean methods. 

import org.springframework.context.annotation.Condition;

@ConfigurationProperties
public class Property1 implements Condition{
    boolean property2Enabled;                 

    @Override
    public boolean matches()
       return property2Enabled;
    }
}

thisShouldBeValidated should be applied only if the value of property2Enabled is true. Otherwise its ignored.

import org.springframework.context.annotation.Condition;

public class Property2 {
    @NotNull
    @Size(min = 1)
    String thisShouldBeValidated;

    @Bean
    @Conditional(Property1.class)
    void Property2 yourMethod() {
       system.out.println("whatever"+ thisShouldBeValidated);
    }        
}

As you can see, @Conditional is given a Class that specifies the condition—in this case, Property1. The class given to @Conditional can be any type that implements the Condition interface.

Upvotes: 2

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