protected void buildDirectAggregateMapHolderDescriptor() {
    RelationalDescriptor descriptor = new RelationalDescriptor();

    // SECTION: DESCRIPTOR
    descriptor.setJavaClass(DirectAggregateMapHolder.class);
    Vector vector = new Vector();
    vector.addElement("DIR_AGG_MAP_HOLDER");
    descriptor.setTableNames(vector);
    descriptor.addPrimaryKeyFieldName("DIR_AGG_MAP_HOLDER.ID");

    // SECTION: PROPERTIES
    descriptor.setIdentityMapClass(
        org.eclipse.persistence.internal.identitymaps.FullIdentityMap.class);
    descriptor.setExistenceChecking("Check cache");
    descriptor.setIdentityMapSize(100);
    descriptor.setSequenceNumberName("DIR_AGG_MAP_HOLDER_ID");
    descriptor.setSequenceNumberFieldName("ID");

    // SECTION: DIRECTTOFIELDMAPPING
    org.eclipse.persistence.mappings.DirectToFieldMapping directtofieldmapping =
        new org.eclipse.persistence.mappings.DirectToFieldMapping();
    directtofieldmapping.setAttributeName("id");
    directtofieldmapping.setIsReadOnly(false);
    directtofieldmapping.setGetMethodName("getId");
    directtofieldmapping.setSetMethodName("setId");
    directtofieldmapping.setFieldName("DIR_AGG_MAP_HOLDER.ID");
    descriptor.addMapping(directtofieldmapping);

    // SECTION: AGGREGATECOLLECTIONMAPPING
    org.eclipse.persistence.mappings.AggregateCollectionMapping aggregatecollectionmapping =
        new org.eclipse.persistence.mappings.AggregateCollectionMapping();
    aggregatecollectionmapping.setAttributeName("directToAggregateMap");
    aggregatecollectionmapping.setIndirectionPolicy(new TransparentIndirectionPolicy());
    aggregatecollectionmapping.setGetMethodName("getDirectToAggregateMap");
    aggregatecollectionmapping.setSetMethodName("setDirectToAggregateMap");
    aggregatecollectionmapping.setReferenceClass(AggregateMapValue.class);
    aggregatecollectionmapping.addTargetForeignKeyFieldName(
        "DIR_AGG_MAP_REL.HOLDER_ID", "DIR_AGG_MAP_HOLDER.ID");
    aggregatecollectionmapping.addFieldNameTranslation(
        "DIR_AGG_MAP_REL.MAP_VALUE", "value->DIRECT");

    org.eclipse.persistence.mappings.DirectToFieldMapping keyMapping =
        new org.eclipse.persistence.mappings.DirectToFieldMapping();
    keyMapping.setFieldName("DIR_AGG_MAP_REL.MAP_KEY");
    keyMapping.setAttributeClassification(Integer.class);
    keyMapping.setDescriptor(descriptor);

    MappedKeyMapContainerPolicy policy = new MappedKeyMapContainerPolicy(IndirectMap.class);
    policy.setKeyMapping(keyMapping);
    policy.setValueMapping(aggregatecollectionmapping);
    aggregatecollectionmapping.setContainerPolicy(policy);

    descriptor.addMapping(aggregatecollectionmapping);

    addDescriptor(descriptor);
  }
  public void test() throws Exception {
    DirectToFieldMapping map = new DirectToFieldMapping();
    map.setAttributeName("foobar");
    map.setAttributeClassification(Hashtable.class);

    try {
      map.getObjectValue("foobar", getSession());
    } catch (ConversionException e) {
      m_exception = e;
    }
  }
  protected void buildAggregateMapKeyDescriptor() {
    RelationalDescriptor descriptor = new RelationalDescriptor();
    descriptor.descriptorIsAggregateCollection();
    descriptor.setJavaClass(AggregateMapKey.class);

    // Descriptor Properties.
    descriptor.setAlias("AggregateMapKey");

    // Mappings.
    DirectToFieldMapping keyMapping = new DirectToFieldMapping();
    keyMapping.setAttributeName("key");
    keyMapping.setFieldName("key->DIRECT");
    keyMapping.setAttributeClassification(Integer.class);
    descriptor.addMapping(keyMapping);

    addDescriptor(descriptor);
  }