Hi all,
I am facing a complex requirement, puzzling me a lot. Help...

Hibernate:4.3.6
MySql 5.6.21

For support dynamic extension on standard product, such as:
Standard POJO:

package com.inspur.gsp;

import java.util.HashMap;
import java.util.Map;

public class Person {
private String id;
private String age;

private Map<CustomPK, Person_T> i18nProperty = new HashMap<CustomPK, Person_T>();

private Map<String, Map<String, Object>> extProperty = new HashMap<String, Map<String, Object>>();

public Map<CustomPK, Person_T> getI18nProperty() {
return i18nProperty;
}

public void setI18nProperity(Map<CustomPK, Person_T> i18nProperty) {
this.i18nProperty = i18nProperty;
}

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getAge() {
return age;
}

public void setAge(String age) {
this.age = age;
}

public Map<String, Map<String, Object>> getExtProperity() {
return extProperty;
}

public void setExtProperity(Map<String, Map<String, Object>> extProperity) {
this.extProperty = extProperity;
}
}


So, ExtProperity's type is Map<String, Map<String, Object>>, it will be used for storage extension property. Then we need to persist it to database.

Here is my hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Nov 3, 2014 11:48:31 AM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.inspur.gsp.Person" table="GSPPerson">
<id name="id" type="java.lang.String">
<column name="ID" length="36" />
<generator class="assigned" />
</id>
<property name="age" type="java.lang.String">
<column name="age" length="128" />
</property>
<map name="i18nProperty" table="GSPPerson_T">
<key column="ID"></key>
<composite-map-key class="com.inspur.gsp.CustomerPK">
<key-property name="culture"></key-property>
</composite-map-key>
<composite-element class="com.inspur.gsp.Person_T">
<property name="description" column="description"></property>
<property name="comments" column="comments"></property>
</composite-element>
</map>

<map name="extProperty" table="GSPPerson_Ext">
<key column="ID"></key>
<composite-map-key class="com.inspur.gsp.CustomerPK">
<key-property name="culture"></key-property>
</composite-map-key>
<composite-element class="java.util.HashMap">
<property name="ext1" column="ext1"></property>
<property name="ext2" column="ext2"></property>
</composite-element>
</map>

</class>
</hibernate-mapping>

Test code:
SessionFactory sf = createSessionFactory();
Person person = new Person();
person.setId("1");
person.setAge("30");
HashMap<CustomPK, Person_T> i18nProperity = new HashMap<CustomPK, Person_T>();
Person_T t1 = new Person_T();
t1.setComments("abc");
t1.setDescription("description");

Person_T t2 = new Person_T();
t2.setComments("efg");
t2.setDescription("ooooooo");

i18nProperity.put(new CustomPK("1", "cn"), t1);
i18nProperity.put(new CustomPK("1", "en"), t2);
person.setI18nProperity(i18nProperity);

HashMap<String, HashMap<String,Object>> extProperty = new HashMap<String, HashMap<String,Object>>();
HashMap<String,Object> e1 = new HashMap<String,Object>();
e1.put("ext1", 1);
e1.put("ext2", "c001");

extProperty.put("0001", e1);
person.setExtProperity(extProperty);

Session session = sf.getCurrentSession();
Transaction ts = session.beginTransaction();
session.save(person);
Person person2 = (Person) session.get(Person.class, "1");

ts.commit();

The configuraion in hbm.xml cannot work. Please help me. Thanks.

Eric