Best way to Map HashMap or java.util.Properties class ????

mooki · **Joined:** Thu Aug 12, 2004 9:32 am **Posts:** 17

Hibernate version:2.1.6

using:Oracle 8i

Hi,
I am new to Hibernate.
I have some classes with simple HashMaps or Properties members.

they are usually contains Key-string and Value-string

can someone please show me what should be the Mapping for such a class and how should it look like in the database ?

I tried somthing like :
class :

Code:

public class Group {
   private String      id;
   public  String       name;
   public  String       gdlName;
   public  HashMap    gdlArgs;   

Oracle :

Code:

               GRP3
 Name                 Type
 ------------------  ------------
 ID                      VARCHAR2(40)
 NAME                  VARCHAR2(40)
 GDLNAME            VARCHAR2(40)
 GDLARGS_ID       NUMBER(10)

         GDLARGS
 Name                       Type
 -------------------- ------------
 GDLARGS_ID       NUMBER(10)
 KEY                     VARCHAR2(40)
 VALUE                 VARCHAR2(40)

and Map :

Code:

    <class name="test.hibernate.Group" table="GRP3">
        <id name="id" type="string" unsaved-value="null" >
            <column name="id" sql-type="char(32)" not-null="true"/>
            <generator class="uuid.hex"/>
        </id>
        <property name="name">
            <column name="name" sql-type="char(40)" not-null="true"/>
        </property>
        <property name="gdlName">
            <column name="gdlName" sql-type="char(40)" not-null="true"/>
        </property>
        
        <map name="gdlArgs" table="GDLARGS"> 
              <key> 
     <column name="GDLARGS_ID" sql-type="NUMBER(10)" /> 
               </key> 
            <index type="object" column="KEY" /> 
           <element type="object" column="VALUE" /> 
        </map>
    </class>

I got collection element mapping has wrong number of columns
and when index/element type were string instead of "object" i got :

Quote:

exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of test.hibernate.Group.setGdlArgs

What am I doing wrong ?

dplass · **Posted:** Thu Aug 12, 2004 12:22 pm

I think you have to specify access=field in the map declaration

dplass · **Posted:** Thu Aug 12, 2004 12:22 pm

Sorry, that should be

Code:

access="field"

mooki · **Joined:** Thu Aug 12, 2004 9:32 am **Posts:** 17

I added access="filed" as :

Code:

..
..
<map name="gdlArgs" table="GDLARGS" access="field"> 
   <key> 
       <column name="GDLARGS_ID" sql-type="NUMBER(10)" /> 
   </key> 
   <index type="string" column="KEY" /> 
   <element type="string" column="VALUE" />   
</map>

and I got :
could not set a field value by reflection setter of test.hibernate.Group.gdlArgs[/quote]