example code

public static DimensionDynamicAccount defaultDimension2ledgerDimension(LedgerJournalAC _ledgerJournalAC,DimensionDefault _defaultDimension )
{
    container           conDimName;
    container           conDimValue;
    int                 loop = 1;
    DimensionValue      dimValue;
    Name                dimName;

    DimensionServiceProvider    DimensionServiceProvider = new DimensionServiceProvider();
    LedgerAccountContract       LedgerAccountContract    = new LedgerAccountContract();
    List                        ListValueContract        = new List(Types::Class);
    DimensionAttributeValueContract     ValueContract;
    dimensionAttributeValueCombination  dimensionAttributeValueCombination;
    DimensionStorage                    dimStorage;

    conDimName = Global::getDimensionNameTID();

    while(loop <= conLen(conDimName))
    {
        dimName  = conPeek(conDimName,loop);
        dimValue = Global::getDimensionValueTEC(_defaultDimension,dimName);
        if(dimValue)
        {
             ValueContract = new DimensionAttributeValueContract();
             ValueContract.parmName(dimName);
             ValueContract.parmValue(dimValue);
             ListValueContract.addEnd(ValueContract);
        }
        loop++;
    }

   LedgerAccountContract.parmMainAccount(_ledgerJournalAC);
   LedgerAccountContract.parmValues(ListValueContract);
   dimStorage = DimensionServiceProvider::buildDimensionStorageForLedgerAccount(LedgerAccountContract);
   dimensionAttributeValueCombination = DimensionAttributeValueCombination::find(dimStorage.save());
   return dimensionAttributeValueCombination.RecId;

}

this below is a custom method on global class.. (or you can put it on other class)

public static container getDimensionNameTID()
{
    DimensionAttribute              dimAttr;
    DimensionAttributeSetItem       dimAttrSetItem;
    DimensionEnumeration            dimensionSetId;
    DimensionAttributeValue         dimAttributeValue;
    container                       DimensionName;

    dimensionSetId      = DimensionCache::getDimensionAttributeSetForLedger();

    while select dimAttr order by Name
                where dimAttr.Type != DimensionAttributeType::MainAccount
            join RecId from dimAttrSetItem
                where dimAttrSetItem.DimensionAttribute     == dimAttr.RecId &&
                      dimAttrSetItem.DimensionAttributeSet  == dimensionSetId
            {
                dimensionName += dimAttr.Name;

            }

    return DimensionName;
}

this below is a custom method on global class.. (or you can put it on other class)

public static str 255 getDimensionValueTEC(RecId defaultDimension, Name dimName)
 {
   DimensionAttributeValueSetStorage  dimStorage;
   Counter               i;
   DimensionAttribute         dimAttributeCostCenter;
   DimensionAttributeValue       dimAttributeValue;
   dimStorage = DimensionAttributeValueSetStorage::find(defaultDimension);
   return dimStorage.getDisplayValueByDimensionAttribute(DimensionAttribute::findByName(dimName).RecId);
 }