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From "Kirill Petrov (JIRA)" <j...@apache.org>
Subject [jira] Created: (OJB-62) addPathClass in QueryByCriteria does not consider inheritance
Date Thu, 28 Jul 2005 15:17:39 GMT
addPathClass in QueryByCriteria does not consider inheritance
-------------------------------------------------------------

         Key: OJB-62
         URL: http://issues.apache.org/jira/browse/OJB-62
     Project: OJB
        Type: Bug
  Components: PB-API  
 Environment: postgresql, ojb 1.0.3
    Reporter: Kirill Petrov


I guess there is a bug in the addPathClass method. Orirginally I posted it on the mailing
list and then you requested me to submit a new bug on this website:

here is the code that I have
public static Collection findModelsByAuthorsName(String aName) {

    PersistenceBroker broker = PersistenceBrokerFactory.defaultPersistenceBroker();

    try{
      Criteria crit = new Criteria();
      crit.addLike("sources.author", aName);
      QueryByCriteria query = new QueryByCriteria(Model.class, crit, true);
      query.addPathClass("sources", Citation.class);
      return broker.getCollectionByQuery(query);
    } finally {
      broker.close();
    }
  }

when I run it I get an error (below). The problem is that Citation is a superclass that has
a number of classes that implement it. If instead of Citation I use OJBCitation (which is
not extended by any class) then everything works fine.
Here is the definition of Citation:
here is what I have:
<class-descriptor class="edu.uci.ics.sigmoid.Citation">
  <extent-class class-ref="edu.uci.ics.sigmoid.OJBCitation" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Article" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Book" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Booklet" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Unpublished" />
  <extent-class class-ref="edu.uci.ics.sigmoid.TechReport" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Proceedings" />
  <extent-class class-ref="edu.uci.ics.sigmoid.PhDThesis" />
  <extent-class class-ref="edu.uci.ics.sigmoid.MiscCitation" />
  <extent-class class-ref="edu.uci.ics.sigmoid.MastersThesis" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Manual" />
  <extent-class class-ref="edu.uci.ics.sigmoid.InProceedings" />
  <extent-class class-ref="edu.uci.ics.sigmoid.InCollection" />
  <extent-class class-ref="edu.uci.ics.sigmoid.InBook" />
  <extent-class class-ref="edu.uci.ics.sigmoid.Conference" />
</class-descriptor> 

Here is the exception I get.

[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG: createTableAlias2:
path: sources* tableAlias: model_sources_knowledge_source A1
[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG: Result of getTableAlias():
null A2
[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG: SQL:SELECT DISTINCT
A0._id,A0.name,A0.extended_description,A0.license_id,A0.unique_dbid,A0.comment FR\
OM model A0 INNER JOIN (model_sources_knowledge_source A1 INNER JOIN null A2 ON A1.knowledge_source_id=A2._id)
ON A0._id=A1.model_id WHERE author LIKE ?
[org.apache.ojb.broker.accesslayer.JdbcAccessImpl] ERROR: SQLException during the execution
of the query (for edu.uci.ics.sigmoid.OJBModel): ERROR: syntax error at or near \
"null"
ERROR: syntax error at or near "null"
java.sql.SQLException: ERROR: syntax error at or near "null"
        at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1471)
        at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1256)
        at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:175)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:389)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:330)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:240)


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