GetterSetterPropertyDescriptor.writeDeepDestinationValue NullpointerException

[DozerUser]

Hi all,

I am new to Dozer  and trying to do the following mapping but getting the below error. Can some one please help me understand what I am doing wrong and what should be the right approach.

Thanks.

Class structure -

Source = SourceRequest-> Order -> <List>LineItem

Dest = DestRequest - >Doc -> LnItms > <List>LnItm

excerpts from my beanMappping.xml -

<mapping type="one-way" wildcard="false" map-null="false" map-empty-string="false">

<class-a>sourcePackage.Order</class-a>

<class-b>destPackage.Doc</class-b>

<field>

<a>currency</a>

<b>currn</b>

</field>

<field>

<a>lineItems</a>

<b>lnItms.lnItm</b>

<a-hint>sourcePackage.LineItem</a-hint> 

<b-hint>destPackage.LnItm</b-hint>

</field>

</mapping>

<mapping type="one-way" wildcard="false" map-null="false" map-empty-string="false">

<class-a>sourcePackage.LineItem</class-a>

<class-b>destPackage.LnItm</class-b>

<field>

<a>id</a>

<b>lnItmId</b>

</field>

<field>

<a>lineNumber</a>

<b>lnItmNm</b>

</field>

</mapping>

I am getting the following exception -

1895 [main] DEBUG org.dozer.fieldmap.FieldMap  - Getting ready to invoke write method on the destination object. Dest Obj: Doc, Dest value: [destPackage.LnItm@1315415]

1895 [main] ERROR org.dozer.MappingProcessor  - Field mapping error -->

  MapId: null

  Type: null

  Source parent class: sourcePackage.Order

  Source field name: lineItems

  Source field type: class java.util.ArrayList

  Source field value: [sourcePackage.model.LineItem@1b6634c]

  Dest parent class: destPackage.Doc

  Dest field name: lnItms.lnItm

  Dest field type: java.util.List

java.lang.NullPointerException

at org.dozer.util.ReflectionUtils.invoke(ReflectionUtils.java:286)

at org.dozer.propertydescriptor.GetterSetterPropertyDescriptor.writeDeepDestinationValue(GetterSetterPropertyDescriptor.java:240)

at org.dozer.propertydescriptor.GetterSetterPropertyDescriptor.setPropertyValue(GetterSetterPropertyDescriptor.java:86)

at org.dozer.fieldmap.FieldMap.writeDestValue(FieldMap.java:94)

[DozerUser]

I was able to resolve the issue. The issue was created due to JAXB generated dest List variable without any setter method. After setting is-accesible the issue got resolved. The other option would be to generate JAXB classes with this plugin. http://confluence.highsource.org/display/J2B/Setters+Plugin