EJBQLOuterJoinErrorTestCase.java

package strimillinn.temp;

import org.apache.cayenne.ObjectContext;
import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.query.EJBQLQuery;

import strimillinn.core.StrimillinnCore;
import strimillinn.core.model.Login;
import strimillinn.core.model.User;

/**
 * Demonstrates a potential bug in Cayenne EJBQL generation when generating EJBQL from expressions with outer joins.
 */

public class EJBQLOuterJoinErrorTestCase {

	public static void main( String[] args ) {
		ObjectContext objectContext = StrimillinnCore.newContext();
		Expression exp = Login.USER.outer().dot( User.NAME ).eq( "Hugi Þórðarson" );
		String ejbqlString = "select a.uniqueID from Login a where " + exp.toEJBQL( "a" );
		EJBQLQuery query = new EJBQLQuery( ejbqlString );

		objectContext.performQuery( query ); // Error occurs here, during the query.
	}
}

Stack trace.txt

Exception in thread "main" org.apache.cayenne.ejbql.EJBQLException: [v.4.0.M2 Feb 26 2015 08:16:32] Error parsing EJB QL statement
	at org.apache.cayenne.ejbql.parser.EJBQL$EJBQLDefaultParser.compile(EJBQL.java:33)
	at org.apache.cayenne.query.EJBQLQuery.getExpression(EJBQLQuery.java:176)
	at org.apache.cayenne.query.EJBQLQueryMetadata.resolve(EJBQLQueryMetadata.java:38)
	at org.apache.cayenne.query.EJBQLQuery.getMetaData(EJBQLQuery.java:88)
	at org.apache.cayenne.util.ObjectContextQueryAction.<init>(ObjectContextQueryAction.java:81)
	at org.apache.cayenne.access.DataContextQueryAction.<init>(DataContextQueryAction.java:49)
	at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:985)
	at org.apache.cayenne.access.DataContext.performQuery(DataContext.java:974)
	at strimillinn.temp.EJBQLOuterJoinErrorTestCase.main(EJBQLOuterJoinErrorTestCase.java:23)
Caused by: org.apache.cayenne.ejbql.parser.ParseException: Encountered " <IDENTIFIER> "a "" at line 1, column 38.
Was expecting:
    "(" ...
    
	at org.apache.cayenne.ejbql.parser.EJBQL.generateParseException(EJBQL.java:9469)
	at org.apache.cayenne.ejbql.parser.EJBQL.jj_consume_token(EJBQL.java:9348)
	at org.apache.cayenne.ejbql.parser.EJBQL.conditional_primary(EJBQL.java:1934)
	at org.apache.cayenne.ejbql.parser.EJBQL.conditional_factor(EJBQL.java:1912)
	at org.apache.cayenne.ejbql.parser.EJBQL.conditional_term(EJBQL.java:1776)
	at org.apache.cayenne.ejbql.parser.EJBQL.conditional_expression(EJBQL.java:1738)
	at org.apache.cayenne.ejbql.parser.EJBQL.where_clause(EJBQL.java:1585)
	at org.apache.cayenne.ejbql.parser.EJBQL.select_statement(EJBQL.java:69)
	at org.apache.cayenne.ejbql.parser.EJBQL.parseQuery(EJBQL.java:41)
	at org.apache.cayenne.ejbql.parser.EJBQL$EJBQLDefaultParser.compile(EJBQL.java:30)
	... 8 more