hi. i dont know what is the problem, but im using a xml file insted to configure the entity manager and never gave me a problem. Following is a hbm2ddl.xml file and the persistence.xml
hbm2ddl.xml
Code:
<?xml version="1.0" encoding="UTF-8" ?>
<project name="hbm2ddl" default="all" basedir=".">
<target name="hbm2ddl" description="Export a generated schema to DB">
<property name="build.dir" value="./build/web/WEB-INF/classes" />
<property name="config.dir" value="./src/conf" />
<path id="toolslib">
<path location="lib/hibernate-core/c3p0-0.9.1.jar" />
<path location="lib/hibernate-core/hibernate3.jar" />
<path location="lib/hibernate-core/commons-collections-2.1.1.jar" />
<path location="lib/hibernate-core/commons-logging-1.0.4.jar" />
<path location="lib/hibernate-core/dom4j-1.6.1.jar" />
<path location="lib/hibernate-entitymanager/hibernate-annotations.jar" />
<path location="lib/hibernate-entitymanager/ejb3-persistence.jar" />
<path location="lib/hibernate-entitymanager/hibernate-entitymanager.jar" />
<path location="lib/hibernate-entitymanager/javassist.jar" />
<path location="lib/hibernate-entitymanager/jboss-archive-browsing.jar" />
<path location="lib/hibernate-tools/hibernate-tools.jar" />
<path location="lib/hibernate-tools/freemarker.jar" />
<path location="lib/mysql-connector-java-3.1.8-bin.jar" />
</path>
<taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="toolslib" />
<hibernatetool destdir="${build.dir}">
<classpath path="${build.dir}" />
<jpaconfiguration persistenceunit="ImmobilePU" />
<hbm2ddl drop="true" create="true" export="true" outputfilename="sql-ddl.sql" delimiter=";" format="true" />
</hibernatetool>
</target>
</project>
Code:
<?xml version="1.0" encoding="UTF-8" ?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="ImmobilePU">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/immo" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.c3p0.min_size" value="5" />
<property name="hibernate.c3p0.max_size" value="20" />
<property name="hibernate.c3p0.timeout" value="300" />
<property name="hibernate.c3p0.max_statements" value="50" />
<property name="hibernate.c3p0.idle_test_period" value="3000" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
Code:
public class HibernateUtil {
private static EntityManagerFactory emf;
public static EntityManagerFactory getEntityManagerFactory() {
if (emf == null ) {
// todo change the entity persistence unit name
try{
emf = Persistence.createEntityManagerFactory("PersistenceUnitNAME");
}catch(Exception e){
e.printStackTrace();
}
}
return emf;
}
public static void closeEntityManagerFactory() {
if (emf != null ) {
emf.close();
}
}
/**
* Este método retorna a propriedade de uma Entity, passando a path até a propriedade
* Ex: Distrito de um imovel - Distrito.Nome
*
* @param entity
*
*
**/
public static Object getEntityProperty(Object entity, String pathToProperty){
Object actualEntity = null;
Object value = null;
String methodName = null;
String[] parsedPath = pathToProperty.split("\\.");
Object[] arguments = new Object[]{};
Method getValueMethod = null;
if(pathToProperty.length() == 0){
return "";
}
if(parsedPath.length == 0){
parsedPath = new String[1];
parsedPath[0] = pathToProperty;
}
try {
actualEntity = entity;
for(int i=0; i < parsedPath.length; i++){
methodName = "get" + parsedPath[i];
getValueMethod = actualEntity.getClass().getMethod(methodName, new Class[] {});
value = getValueMethod.invoke(actualEntity, arguments);
actualEntity = value;
}
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
return "";
} catch (IllegalAccessException ex) {
ex.printStackTrace();
return "";
} catch (InvocationTargetException ex) {
ex.printStackTrace();
return "";
} catch (SecurityException ex) {
ex.printStackTrace();
return "";
} catch (NoSuchMethodException ex) {
ex.printStackTrace();
return "";
}
return value;
}
}
for more informations read the
"Hibernate EntityManager User Guide"[/]
hope it helped you to solve the problem
--ms
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