Lookup Field using UIBuilder in SSRS report in ax 2012

Client want to see the report color wise but in report there is only item wise.

So I have  added color in selection which must be lookup

Then add one parameter to existing contract class

[

DataMemberAttribute("EcoResColorName"),

SysOperationDisplayOrderAttribute("4")

]

public EcoResColorName parmInventColorId(EcoResColorName _inventColorId = inventColorId)

{

    inventColorId = _inventColorId;

    return inventColorId;

}

For that I create UI builder class

name the class and extends SrsReportDataContractUIBuilder

public class Aks_SRCustomLookupsUIBuilder extends SrsReportDataContractUIBuilder

{

     BOMRDPContract    BOMRDPContract;

     ItemId  itemId;

}

public void build()

{

    int i;

    BOMRDPContract = this.dataContractObject();// as BOMRDPContract;

    this.addDialogField(methodStr(BOMRDPContract, paramItemId),BOMRDPContract);

    this.addDialogField(methodStr(BOMRDPContract, paramKgs),BOMRDPContract);

    this.addDialogField(methodStr(BOMRDPContract, paramQty),BOMRDPContract);

    this.addDialogField(methodStr(BOMRDPContract, parmInventColorId),BOMRDPContract);

}

public void postBuild()

{

     DialogField dlgBomid;

     DialogField dlgColorid;

    super();

    dlgColorid = this.bindInfo().getDialogField(this.dataContractObject(),methodStr(BOMRDPContract,parmInventColorId));

    dlgColorid.registerOverrideMethod(methodStr(FormStringControl, lookup),methodStr(GOD_SRCustomLookupsUIBuilder, BomIdLookUp),this);

}

private void BomIdLookUp(FormStringControl  _formStringControl)

{

    Query query = new Query();

    QueryBuildDataSource DS;

    SysTableLookup sysTablelookup;

    QueryBuildDataSource    queryBuildDataSourceLocal,queryBuildDataSourceLocal1,queryBuildDataSourceLocal2;

    //aks

    InventDimCombination inventDimCombination;

    InventDim                     inventDim;

    //aks

    //create a table lookup

   /* DS = query.addDataSource(tableNum(EcoResColor));

    sysTablelookup = SysTableLookup::newParameters(tableNum(EcoResColor), _formStringControl);

    sysTablelookup.addLookupfield(fieldNum(EcoResColor,Name));*/

    sysTablelookup = SysTableLookup::newParameters(tableNum(inventDim), _formStringControl);

    sysTablelookup.addLookupfield(fieldNum(inventDim,InventColorId));

    DS = query.addDataSource(tableNum(inventDim));

    DS = DS.addDataSource(inventDimCombination);

    DS.addLink(fieldNum(inventDim, InventDimId),fieldNum(inventDimCombination,InventDimId));

    DS.addRange(fieldNum(inventDimCombination,ItemId)).value(BOMRDPContract.paramItemId());

    //"1120132");

    //assign the query and call lookup

    sysTablelookup.parmQuery(query);

    sysTablelookup.performFormLookup();

}

Thanks
Akshay