CODEWITHSUNDEEP
entitymanagerjpa-2.1hibernate-entitymanager
Manuel Z
Manuel Z

Reputation: 51

JPA 2.1 Type Converter doesn't get executed on NULL values

I'm testing the new JPA 2.1 Type Converters. I want to avoid NULL String values to be stored in a legacy database as they are not allowed. So I defined the following converter: 

@Converter(autoApply=true)  
public class CString implements AttributeConverter<String, String> {  

    @Override  
    public String convertToDatabaseColumn(String str) {  
        if( str == null || str.length() == 0 ) {  
            return " ";
        } else {
            return str;
        }
    }

    @Override
    public String convertToEntityAttribute(String str) {
        if( str == null || str.length() == 0 || str.equals(" ") ) {
            return null;
        } else {
            return str;
        }
    }

}

String properties should be converted to a space character if they are NULL, but the converter method's are not executed when the properties are NULL.
I'm trying hibernate-jpa-2.1-api (1.0.0.Final) and hibernate-entitymanager (4.3.6.Final).
Is there any JPA 2.1 compliant way to get around this?

Upvotes: 5

Views: 2800

Answers (1)

Driss Amri
Driss Amri

Reputation: 1805

UPDATE: this bug has been resolved in the latest Hibernate 5.0.0.Beta1 as part of JIRA issue HHH-8697 and will be in Hibernate 4.3.9 as soon as it is released from the 4.3.9-SNAPSHOT version

If you don't want to upgrade to the beta version, you can use a workaround: take a look at JPA/Hibernate map null which explains using the getter and setter to implement your logic.

Upvotes: 2

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