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botah
 Post subject: Criteria API createAlias to a 'map' property type
PostPosted: Mon Feb 16, 2004 6:24 pm 
Newbie

Joined: Mon Feb 16, 2004 2:36 pm
Posts: 12
Hi,

I have a property that is mapped as a 'map' with a String index column and a composite-element. I am trying to use the Criteria API and join onto this mapped column to fetch only rows with a specific mapped index.

How do you use the Query API... ie criteria... to join to a property that is a 'map'???

I can successfully create a string query and use the session.find(squery) to fetch my records.

However, if I try to the API query I am getting the attached error.

The straight query that WORKS:
Code:
String query = "select us " + "from com.esage.agility.domain.UserStory us " + "join us.propertiesMapped prop where prop.valueDomainId = 1 and index(prop) = 'CUSTOM_PROPERTY_235'";

results = HibernateSession.currentSession().find(query);


My attempt at a criteria api based approach. I simplified it a bit:
Code:
results = HibernateSession.currentSession().createCriteria(UserStory.class)
                .createAlias("propertiesMapped", "prop")


Code:
When I execute this criteria I get this error:

net.sf.hibernate.AssertionFailure: not an association
   at net.sf.hibernate.collection.AbstractCollectionPersister.getElementPersister(AbstractCollectionPersister.java:707)
   at net.sf.hibernate.type.PersistentCollectionType.getAssociatedClass(PersistentCollectionType.java:221)
   at net.sf.hibernate.impl.CriteriaImpl.getClassForPath(CriteriaImpl.java:282)
   at net.sf.hibernate.impl.CriteriaImpl.createAlias(CriteriaImpl.java:239)
   at net.sf.hibernate.impl.CriteriaImpl.createAlias(CriteriaImpl.java:215)
   at com.esage.agility.action.ExecuteSearchCriteriaAction.executeSearch(ExecuteSearchCriteriaAction.java:63)
   at com.esage.agility.action.ExecuteSearchCriteriaAction.executeAction(ExecuteSearchCriteriaAction.java:41)
   at com.esage.agility.action.ExtractSearchCriteriaAction.executeSearch(ExtractSearchCriteriaAction.java:55)
   at com.esage.agility.action.ExtractSearchCriteriaAction.executeAction(ExtractSearchCriteriaAction.java:42)
   at com.esage.agility.action.BaseActionSupport.execute(BaseActionSupport.java:77)


And here is the mapping file:(only what I thought would be interesting)

Code:
    <class name="com.esage.agility.domain.Case" table="BASE_CASE" discriminator-value="B">
        <cache usage="read-write"/>


<map name="propertiesMapped" table="PROPERTY_SET" >
    <key column="CASE_ID"/>
    <index column="TYPE" type="string"/>

    <composite-element class="com.esage.agility.domain.propertyset.PropertySetItem">
            <property name="valueLong" column="VALUE_LONG" type="long"/>
            <property name="valueString" column="VALUE_STRING" type="string"/>
            <property name="valueDomainId" column="VALUE_DOMAIN_ID" type="long"/>
    </composite-element>

</map>

        <!--
        <set name="propertiesSet" lazy="true" cascade="all">

            <key column="entity_id"/>
            <one-to-many class="com.opensymphony.module.propertyset.hibernate.PropertySetItem"/>
        </set>
-->
        <many-to-one name="parent" class="com.esage.agility.domain.Case" column="PARENT_CASE_ID"/>
<!--        <many-to-one name="assignedTo" class="com.esage.agility.domain.Person" column="ASSIGNED_TO"/>
-->

        <subclass name="com.esage.agility.domain.UserStory" discriminator-value="U">
        </subclass>
    </class>
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gavin
 Post subject:
PostPosted: Tue Feb 17, 2004 4:27 am 
Hibernate Team
Hibernate Team

Joined: Tue Aug 26, 2003 12:50 pm
Posts: 5130
Location: Melbourne, Australia
This (querying collections of values) is not currently supported in Criteria API. Use HQL.
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botah
 Post subject:
PostPosted: Wed Feb 18, 2004 12:42 pm 
Newbie

Joined: Mon Feb 16, 2004 2:36 pm
Posts: 12
Any chance of getting this implemented any time soon.
My code went from cool using the API to ugly using the HQL.

Mike
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jellyfish8899
 Post subject: This (querying collections of values) is not currently suppo
PostPosted: Tue Mar 23, 2004 9:54 pm 
Beginner
Beginner

Joined: Tue Mar 23, 2004 8:40 pm
Posts: 22
How about if I work around it with the followings for the collection (the rest would still use Criteria API):

Code:
        Criterion criterion = Expression.sql("exists (select 1 from property_set where {alias}.id = property_set.case_id and property_set.value_string like upper(?))", s, Hibernate.STRING);
        _criteria.add(criterion);



P.S.

Any dynamic way to retrieve the collection table name and key column name ? (via session.getSessionFactory().getClassMetadata ??)
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gavin
 Post subject:
PostPosted: Wed Mar 24, 2004 12:58 am 
Hibernate Team
Hibernate Team

Joined: Tue Aug 26, 2003 12:50 pm
Posts: 5130
Location: Melbourne, Australia
You can get mapping metadata from the Configuration object.
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