hi everbody, I am facing a problem explained below:

I have two classes CodeType.java and CodeTypeDisplay.java

The relationship between two is one to many from CodeType to CodeTypeDisplay.

CodeType.java


public class CodeType extends DSTBaseBusinessClass {

private String typeCode;
private Boolean hideIndicator;
private Boolean editIndicator;
private Boolean deleteIndicator;
private CodeGroup codeGroup;
private Set codeTypeDisplay ;

//getters and setters

}

CodeTypeDisplay.java

public class CodeTypeDisplay extends DSTBasePersistentClass {

private String displayText;
private CodeTypeDisplayKey codeTypeDisplayKey;

}


CodeTypeDisplayKey.java

public class CodeGroupDisplayKey implements Serializable {

private String languageCode;
private String codeGroupCode;
}


DSTBaseBusinessClass.java
public class DSTBaseBusinessClass implements Serializable {
private String dstBaseId;
private String createUserCode;
private String updateUserCode;
private Date createDate;
private Date updateDate;

//getter setters
}

DSTBasePersistentClass.java

public class DSTBasePersistentClass implements Serializable {
private Date createDate;
private String createUserCode;
private Date updateDate;
private String updateUserCode;
//getter setters
}


CodeType.hbm.xml

<hibernate-mapping>
<class name="com.dst.fourx.model.establishmentModel.CodeType" table="CODE_TYPE">

<id name="dstBaseId" type="string" unsaved-value="null">
<column name="CD_TYP_ID" length="50" />
<generator class="uuid.hex" />
</id>

<property name="createDate" type="timestamp" column="CREATE_DT" />

<property name="createUserCode" type="string" column="CREATE_USER_CD" />

<property name="updateDate" type="timestamp" column="LAST_MOD_DT" />

<property name="updateUserCode" type="string" column="LAST_MOD_USER_CD" />

<property name="hideIndicator" column="HIDE_IND" type="boolean"/>

<property name="editIndicator" column="EDIT_IND" type="boolean"/>

<property name="deleteIndicator" column="DEL_IND" type="boolean"/>

<property name="typeCode" column="CD_TYP_CD" type="string"/>

<many-to-one name="codeGroup" class="com.dst.fourx.model.establishmentModel.CodeGroup" column="CD_GRP_CD"/>

<set name="codeTypeDisplay" inverse="true" cascade="all" lazy="false">
<key column="OBJECT_ID"/>
<one-to-many class="com.dst.fourx.model.establishmentModel.CodeTypeDisplay" />
<filter name="languageFilter" condition="LANG_CD = :languageCode" />
</set>

</class>

<query name="findAllCodeTypesForGroup">
<![CDATA[from CodeType ctype where ctype.codeGroup.groupCode = :groupCode]]>
</query>

<filter-def name="languageFilter">
<filter-param name="languageCode" type="string" />
</filter-def>

</hibernate-mapping>


CodeTypeDisplay.hbm.xml

<hibernate-mapping>

<class name="com.dst.fourx.model.establishmentModel.CodeTypeDisplay" table="CODE_TYPE_DISPLAY">


<composite-id name="codeTypeDisplayKey" class="com.dst.fourx.model.establishmentModel.CodeTypeDisplayKey" unsaved-value="none">

<key-many-to-one name="codeTypeId" class="com.dst.fourx.model.establishmentModel.CodeType" column="OBJECT_ID" />

<key-property name="languageCode" column="LANG_CD" type="string"/>

</composite-id>


<property name="createDate" type="timestamp" column="CREATE_DT" />

<property name="createUserCode" type="string" column="CREATE_USER_CD" />

<property name="updateDate" type="timestamp" column="LAST_MOD_DT" />

<property name="updateUserCode" type="string" column="LAST_MOD_USER_CD" />

<property name="displayText" column="DISPLAY_TXT" type="string" />

</class>

</hibernate-mapping>


When I try to update my set by writing the following code:

session.update(codeType);// codeType is the object that contains the set (of elements from CodeTypeDisplay whose displayText field is changed)

then i get this exception: java.lang.IllegalArgumentExcetption - id to load is required for loading

PLEASE GIVE YOUR COMMENTS...
Thanks for viewing...
Narinder Singh