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https://issues.apache.org/jira/browse/JDO-709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17619585#comment-17619585
]
Yubao Liu commented on JDO-709:
-------------------------------
I need add data encryption in service layer because open source databases don't
have good support on encryption, this is a simplified code example:
```java
public class FooEntity {
String id;
@Encrypted
NameEnc name;
@Encrypted
AddressEnc address;
}
```
I have many tables, so many entity classes, and we probably will have more and
more, some of these tables contain sensitive column, the `@Encrypted`
annotation will be processed by an annotation processor which generates class
like this:
```
@Convert(NameEnc.JdoAttributeConverter.class) // <--- it's a pity this isn't
supported by JDO.
public class NameEnc {
String value; // actually it has more fields related to encryption.
public static class JdoAttributeConverter implements
AttributeConverter<NameEnc, String> {
...
}
}
```
I have many generated java classes for these encrypted column, I wouldn't like
to list them in persistence.xml or some other JDO configuration file, because I
have a lot and will have more and more.
If `@Convert` can be used on Java type as *its javadoc describes now*, that
would be very convenient. There won't be any confusion, the converter priority
can be configuration file > @Convert on Java type > @Convert on
field/key/value. If somebody defines multiple AttributeConverter classes for
same Java type, we can explicitly specify the desired converter in
configuration file.
> Standardize field/property converters
> -------------------------------------
>
> Key: JDO-709
> URL: https://issues.apache.org/jira/browse/JDO-709
> Project: JDO
> Issue Type: New Feature
> Components: api, specification, tck
> Reporter: Matthew T. Adams
> Assignee: Craig L Russell
> Priority: Minor
> Labels: converstion, converter, jdo, type, type-converter
> Fix For: JDO 3.2
>
> Attachments: JDO-709-01.patch, JDO-709-3.patch, JDO-709-4.patch
>
>
> This request is to standardize a user's ability to specify conversions of
> fields or properties of persistence-capable classes. Currently, this is left
> to vendor extensions.
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