| TRIM in JPA NamedQuery [message #381079] |
Thu, 04 September 2008 03:04  |
Eclipse User |
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I'm about to replace TopLink Essentials with EclipseLink 1.0.
At the moment I'm facing the problem that JPA NamedQueries where the
function TRIM is used result in a NullPointerException when parsing the
query.
Is this a known issue and is a workaround available? I did not find a bug
in Bugzilla nor a thread in this newsgroup.
Please find below the Entity, persistence.xml, usage of the EntityManager
and the resulting Stacktrace.
com.kn.persistence.Info.java:
package com.kn.persistence;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQuery;
@Entity
@NamedQuery(name="Info.findByText", query="SELECT i FROM Info i WHERE
TRIM(i.text) = :text")
public class Info {
@Id
private long id;
private String text;
public Info() {
super();
}
public long getId() {
return this.id;
}
public String getText() {
return this.text;
}
@Override
public String toString() {
return this.getId() + "=" + this.getText();
}
}
com.kn.persistence.InfoReader.java:
package com.kn.persistence;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
public class InfoReader {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
try {
EntityManagerFactory emf =
Persistence.createEntityManagerFactory("testUnit");
EntityManager em = emf.createEntityManager();
Query query = em.createNamedQuery("Info.findByText");
query.setParameter("text", "test");
List<Info> infos = (List<Info>) query.getResultList();
for (Info info : infos) {
System.out.println(info.toString());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
META-INF/persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="testUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider >
<class>com.kn.persistence.Info</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="eclipselink.jdbc.driver"
value="com.ibm.db2.jcc.DB2Driver"/>
<property name="eclipselink.jdbc.url"
value="jdbc:db2://host:port/database"/>
<property name="eclipselink.jdbc.password" value="XXX"/>
<property name="eclipselink.jdbc.user" value="XXX"/>
<property name="eclipselink.logging.level" value="FINEST"/>
<property name="eclipselink.cache.shared.default"
value="false"/>
</properties>
</persistence-unit>
</persistence>
Stacktrace:
[EL Finest]: 2008.09.04
08:58:04.311--ServerSession(199887850)--Thread(Thread[main,5 ,main])--End
deploying Persistence Unit testUnit; state Deployed; factoryCount 1
Local Exception Stack:
Exception [EclipseLink-8002] (Eclipse Persistence Services - 1.0 (Build
1.0 - 20080707)): org.eclipse.persistence.exceptions.JPQLException
Exception Description: General Problem parsing the query [Info.findByText:
SELECT i FROM Info i WHERE TRIM(i.text) = :text]. The parser returned the
following [null].
Internal Exception: java.lang.NullPointerException
at
org.eclipse.persistence.exceptions.JPQLException.generalPars ingException(JPQLException.java:116)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser .addError(JPQLParser.java:247)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser .parse(JPQLParser.java:135)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser .buildParseTree(JPQLParser.java:94)
at
org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQL DatabaseQuery(EJBQueryImpl.java:203)
at
org.eclipse.persistence.queries.JPAQuery.processJPQLQuery(JP AQuery.java:87)
at
org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl. deploy(EntityManagerSetupImpl.java:258)
at
org.eclipse.persistence.internal.jpa.EntityManagerFactoryImp l.getServerSession(EntityManagerFactoryImpl.java:69)
at
org.eclipse.persistence.internal.jpa.EntityManagerFactoryImp l.createEntityManagerImpl(EntityManagerFactoryImpl.java:118)
at
org.eclipse.persistence.internal.jpa.EntityManagerFactoryImp l.createEntityManagerImpl(EntityManagerFactoryImpl.java:112)
at
org.eclipse.persistence.internal.jpa.EntityManagerFactoryImp l.createEntityManager(EntityManagerFactoryImpl.java:100)
at com.kn.persistence.InfoReader.main(InfoReader.java:16)
Caused by: java.lang.NullPointerException
at
org.eclipse.persistence.internal.jpa.parsing.NodeFactoryImpl .newTrim(NodeFactoryImpl.java:669)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.trim(JPQLParser.java:10120)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.functionsReturningStrings(JPQLParser.java:9867)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.arithmeticPrimary(JPQLParser.java:8824)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.arithmeticFactor(JPQLParser.java:8620)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.arithmeticTerm(JPQLParser.java:8444)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.simpleArithmeticExpression(JPQLParser.java:8351)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.arithmeticExpression(JPQLParser.java:8292)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.simpleConditionalExpression(JPQLParser.java:7039)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.conditionalPrimary(JPQLParser.java:6997)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.conditionalFactor(JPQLParser.java:2989)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.conditionalTerm(JPQLParser.java:2879)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.conditionalExpression(JPQLParser.java:2805)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.whereClause(JPQLParser.java:2762)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.selectStatement(JPQLParser.java:356)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQL Parser.document(JPQLParser.java:261)
at
org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser .parse(JPQLParser.java:133)
... 9 more
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