Neo4j: Custom ConversionService example

[vmarcinko]

Hello,

I'm trying to register my custom conversion for Joda DateTime field that I have inside my mapped node entity, but sicne I cannot see any example in reference docs, I have to ask here...

Anyway, I'm planning to convert Joda dateTime to/from Long.

My to/from converters are:

public class JodaDateTimeToLongConverter implements Converter<DateTime, Long> {
    public Long convert(DateTime dateTime) {
        return dateTime.getMillis();
    }
}

public class LongToJodaDateTimeConverter implements Converter<Long, DateTime> {
    public DateTime convert(Long millis) {
        return new DateTime(millis);
    }
}

And it doesn't work. I get in my log:
INFO [org.springframework.data.neo4j.fieldaccess.Delegat ingFieldAccessorFactory] No FieldAccessor configured for field: class org.joda.time.DateTime timestamp rel: false idx: false

And my spring XML looks like:

    <context:annotation-config/>

    <bean id="graphDatabaseService" class="org.neo4j.kernel.EmbeddedGraphDatabase" destroy-method="shutdown">
        <constructor-arg value="C:/helloworld-neo4j"/>
    </bean>

    <neo4j:config graphDatabaseService="graphDatabaseService"/>

    <bean id="neo4jTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
        <property name="transactionManager" ref="springTransactionManager"/>
        <property name="userTransaction">
            <bean class="org.neo4j.kernel.impl.transaction.UserTransactionImpl">
                <property name="transactionManager" ref="springTransactionManager"/>
            </bean>
        </property>
    </bean>

    <bean id="springTransactionManager" class="org.neo4j.kernel.impl.transaction.SpringTransactionManager">
        <constructor-arg ref="graphDatabaseService"/>
    </bean>


    <tx:annotation-driven transaction-manager="neo4jTransactionManager" />

    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="org.mycompany.neo4j.utils.JodaDateTimeToLongConverter"/>
                <bean class="org.mycompany.neo4j.utils.LongToJodaDateTimeConverter"/>
            </set>
        </property>
    </bean>

Regards,
Vjeran

[vmarcinko]

Something strange is happening here.
It seems that conversion works fine when I want to convert my Joda DateTime field to String, by registering DateTime->String converters, and plainly defining field inside node entity class like:

    private DateTime timestamp;

But when I specify that I want it stored as Long node property, with dateTime->Long converters registered, it doesn't work then:

    @GraphProperty(propertyType = Long.class)
    private DateTime timestamp;

What is more strange, I understood that the library has the same conversion already given for java.util.Date fields, so one can successfuly specify field mapping such as:

    @GraphProperty(propertyType = Long.class)
    private Date timestamp;

Should I report this as a bug?

Regards,
Vjeran

[MichaelHunger]

Do you encounter an exception there? Or does it just not do anything?

Yes please report a bug and if possible share a sample project/test-case that does reproduce the issue.

Thanks a lot

Michael