Hi Tracey,
The other email came without any attachements, so you'll have to re-send. And actually I
think you should send them onlist. I've only done that one type handler and it was last
year. There are much more experienced folks on the list than me, so you have a better
chance of getting help with more eyes.
b
Tracey Annison wrote:
Hiya, Ben
Thank you so much for your reply!
I added the parameterMap, but I'm still getting it reading & writing 0
and 1 to the Db for the Booleans, not Y/N, T/F, and the other strings I
want. My TypeHandler isn't even being called.
I don't suppose you could possibly take a look at my files & tell me
where I'm going wrong, if I sent them to you personally? I'll owe you a
favour, if so!
Cheers
Tracey Annison
-----Original Message-----
From: Ben Munat [mailto:[EMAIL PROTECTED]
Sent: 11 May 2006 17:01
To: [email protected]
Subject: Re: Problem with using generic and specific custom TypeHandlers
Hi Tracey,
I used a custom type handler on a project last year (for a boolean field
on an AS/400 no less :-) ) and I remember struggling to get it to work.
I just went and looked at my map I think you need to create a
parameterMap for the query that uses the type handler as well as a
result map. You specify the type handler for the property that uses it
on both ends. So, here's what mine looks like:
<resultMap id="ScheduledMonthlyPaymentResult"
class="ScheduledMonthlyPayment">
<result property="applicationNumber" column="appnum"/>
<result property="sequenceNumber" column="seqnum"/>
<result property="accountName" column="acctnm"/>
<result property="totalAmountOwed" column="totamt"/>
<result property="monthlyPayment" column="mnthpmt"/>
<result typeHandler="com.foo.bar.dao.BooleanToCharTypeHandler"
property="active" column="active"/>
</resultMap>
<parameterMap id="ScheduledMonthlyPaymentParameters"
class="ScheduledMonthlyPayment">
<parameter property="applicationNumber"/>
<parameter property="sequenceNumber" />
<parameter property="accountName"/>
<parameter property="totalAmountOwed"/>
<parameter property="monthlyPayment" />
<parameter property="active"
typeHandler="com.foo.bar.dao.BooleanToCharTypeHandler"
/>
</parameterMap>
Hope that helps!
b
Tracey Annison wrote:
Hiya!
*** I think I sent this wrong earlier - apologies if it duplicates!
***
We are using iBATIS with Java against a quirky AS/400 database. We
have used custom TypeHandlers successfully to globally map enums
against columns holding String codes, but are now trying to map a
variety of codes to Booleans without success.
As an example, I have three string fields, let's say Fred, Hal, Bill
and Joe.
- Fred and Hal can have values "A", "N", and "Y"
- Bill has values "Y" and "N" (which mean positive & negative)
- Joe has values "1" and "0" (which also mean positive & negative) I
have made a Java enum to hold the A/N/Y values called FlagANY, and a
TypeHandler called TypeHandlerStringANYEnum to convert the string "A",
"N" and "Y" values from the db into the enum FlagANY. I've made Fred
and Hal into FlagANY enums in the Java class ThingIbatis.
Both Bill and Joe are Booleans in the Java class ThingIbatis, and I
have created TypeHandlers TypeHandlerStringYNBoolean and
TypeHandlerString01Boolean to convert their varying string values into
the appropriate Boolean values.
In the sql-map-config.xml, I can map the FlagANY fields globally,
which works fine for Fred and Hal - as they're FlagANY in the Java
class, and as their value on the Db are consistent, the TypeHandler
gets invoked from the sql-map-config.xml setting, and all is well.
Now, Bill and Joe are both Booleans in the Java class, but their
values on the Db differ, so I have to specify their TypeHandlers on a
column-by-column basis in the table's XML file. (I tried omitting the
"
javaType="java.lang.Boolean", but that didn't help)
This ought to work, as far as I can see, but the TypeHandler doesn't
ever get invoked. Is there some special syntax I should be using?
Generic TypeHandler in the sql-map-config.xml- <typeHandler
javaType="uk.co.package.user_type.FlagANY"
callback="uk.co.package.utils.TypeHandlerStringANYEnum"/>
And in the thing.xml I can define a ResultMap like this - <resultMap
id="thingResult" class="uk.co.package.persistence.ThingIbatis">
<result column="OCFRED" property="Fred"/>
<result column="OCHAL" property="Hal"/>
<result column="OCBILL" property="Bill"
javaType="java.lang.Boolean"
typeHandler="uk.co.package.utils.TypeHandlerStringYNBoolean"/>
<result column="OCJOE" property="Joe"
javaType="java.lang.Boolean"
typeHandler="uk.co.package.utils.TypeHandlerString01Boolean"/>
</resultMap>
Cheers
Tracey Annison
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