looped result maps is null if all other 'primitive' attributes are null
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Key: IBATIS-582
URL: https://issues.apache.org/jira/browse/IBATIS-582
Project: iBatis for Java
Issue Type: Bug
Affects Versions: 2.3.3, 2.3.2
Reporter: Andras Linczmayer
If all of the 'primitive' properties of a resultMap are null and it has other
child resultMap then the child resultMap won't be evaluated therefore the
result entity will contain corrupt missing data.
Example:
<resultMap id="personResult" class="Person" groupBy="id">
<result property="id" column="person_id" />
<result property="something" column="something" />
<result property="defaultDetails" resultMap="Person.personDetailsResult" />
</resultMap>
<resultMap id="personDetailsResult" class="person.data.HotelDetails">
<result property="description" column="personDetails_description" />
<result property="information" column="personDetails_information" />
<result property="eyeIdentifier"
resultMap="Person.personEyeIdentifierResult" />
</resultMap>
<resultMap id="personEyeIdentifierResult" class="person.data.EyeIdentifier">
<result property="color" column="eye_color" />
<result property="size" column="eye_size" />
<result property="sin" column="eye_sin" />
</resultMap>
If personDetails_description, personDetails_information column of appropriate
ResultSet are SQL null then the eyeIdentifier will be also null despite the
eye_color, eye_size and eye_sin of the result map are not SQL null.
The problem is near to the references of
com.ibatis.sqlmap.engine.scope.StatementScope.rowDataFound.
Ibatis - instead of implementing the common sense initializing the properties
by step by step via a recursive solution - splits the initialization into two
parts: first the primitives types and only after that the class types.
Unfortunately if all the primitives are null (rowDataFound=false, see ResultMap
getResult(..) function) then the nested children result maps won't be evaluated
because of the 'if (statementScope.isRowDataFound())' condition of the
ResultMap.setNestedResultMappingValue(..) method.
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