How to use

getDescriptor

method

in

org.eclipse.persistence.eis.mappings.EISOneToOneMapping

/**
 * INTERNAL:
 * The foreign keys primary keys are stored as database fields in the hashtable.
 */
protected void initializeForeignKeys(AbstractSession session) {
  HashMap newSourceToTargetKeyFields = new HashMap(getSourceToTargetKeyFields().size());
  HashMap newTargetToSourceKeyFields = new HashMap(getTargetToSourceKeyFields().size());
  Iterator iterator = getSourceToTargetKeyFields().entrySet().iterator();
  while (iterator.hasNext()) {
    Map.Entry entry = (Map.Entry)iterator.next();
    DatabaseField sourceField = (DatabaseField)entry.getKey();
    DatabaseField targetField = (DatabaseField)entry.getValue();
    sourceField = getDescriptor().buildField(sourceField);
    targetField = getReferenceDescriptor().buildField(targetField);
    newSourceToTargetKeyFields.put(sourceField, targetField);
    newTargetToSourceKeyFields.put(targetField, sourceField);
  }
  setSourceToTargetKeyFields(newSourceToTargetKeyFields);
  setTargetToSourceKeyFields(newTargetToSourceKeyFields);
}

/**
 * INTERNAL:
 * The foreign keys primary keys are stored as database fields in the hashtable.
 */
protected void initializeForeignKeys(AbstractSession session) {
  HashMap newSourceToTargetKeyFields = new HashMap(getSourceToTargetKeyFields().size());
  HashMap newTargetToSourceKeyFields = new HashMap(getTargetToSourceKeyFields().size());
  Iterator iterator = getSourceToTargetKeyFields().entrySet().iterator();
  while (iterator.hasNext()) {
    Map.Entry entry = (Map.Entry)iterator.next();
    DatabaseField sourceField = (DatabaseField)entry.getKey();
    DatabaseField targetField = (DatabaseField)entry.getValue();
    sourceField = getDescriptor().buildField(sourceField);
    targetField = getReferenceDescriptor().buildField(targetField);
    newSourceToTargetKeyFields.put(sourceField, targetField);
    newTargetToSourceKeyFields.put(targetField, sourceField);
  }
  setSourceToTargetKeyFields(newSourceToTargetKeyFields);
  setTargetToSourceKeyFields(newTargetToSourceKeyFields);
}

/**
 * INTERNAL:
 * The foreign keys primary keys are stored as database fields in the hashtable.
 */
protected void initializeForeignKeys(AbstractSession session) {
  HashMap newSourceToTargetKeyFields = new HashMap(getSourceToTargetKeyFields().size());
  HashMap newTargetToSourceKeyFields = new HashMap(getTargetToSourceKeyFields().size());
  Iterator iterator = getSourceToTargetKeyFields().entrySet().iterator();
  while (iterator.hasNext()) {
    Map.Entry entry = (Map.Entry)iterator.next();
    DatabaseField sourceField = (DatabaseField)entry.getKey();
    DatabaseField targetField = (DatabaseField)entry.getValue();
    sourceField = getDescriptor().buildField(sourceField);
    targetField = getReferenceDescriptor().buildField(targetField);
    newSourceToTargetKeyFields.put(sourceField, targetField);
    newTargetToSourceKeyFields.put(targetField, sourceField);
  }
  setSourceToTargetKeyFields(newSourceToTargetKeyFields);
  setTargetToSourceKeyFields(newTargetToSourceKeyFields);
}

/**
 * INTERNAL:
 * Extract the foreign key value from the source row.
 */
protected Vector extractForeignKeyFromRow(AbstractRecord row, AbstractSession session) {
  Vector key = new Vector();
  Iterator sourceKeyIterator = getSourceToTargetKeyFields().keySet().iterator();
  while (sourceKeyIterator.hasNext()) {
    DatabaseField field = (DatabaseField)sourceKeyIterator.next();
    Object value = row.get(field);
    // Must ensure the classification gets a cache hit.
    try {
      value = session.getDatasourcePlatform().getConversionManager().convertObject(value, getDescriptor().getObjectBuilder().getFieldClassification(field));
    } catch (ConversionException e) {
      throw ConversionException.couldNotBeConverted(this, getDescriptor(), e);
    }
    key.addElement(value);
  }
  return key;
}

/**
 * INTERNAL:
 * Initialize the mapping.
 */
@Override
public void initialize(AbstractSession session) throws DescriptorException {
  super.initialize(session);
  // Must build foreign keys fields.
  List foreignKeyFields = getForeignKeyFields();
  int size = foreignKeyFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField foreignKeyField = (DatabaseField)foreignKeyFields.get(index);
    foreignKeyField = getDescriptor().buildField(foreignKeyField);
    foreignKeyFields.set(index, foreignKeyField);
  }
  initializeForeignKeys(session);
  if (shouldInitializeSelectionCriteria()) {
    initializeSelectionCriteria(session);
  } else {
    setShouldVerifyDelete(false);
  }
  setFields(collectFields());
}

/**
 * INTERNAL:
 * Initialize the mapping.
 */
public void initialize(AbstractSession session) throws DescriptorException {
  super.initialize(session);
  // Must build foreign keys fields.
  List foreignKeyFields = getForeignKeyFields();
  int size = foreignKeyFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField foreignKeyField = (DatabaseField)foreignKeyFields.get(index);
    foreignKeyField = getDescriptor().buildField(foreignKeyField);
    foreignKeyFields.set(index, foreignKeyField);
  }
  initializeForeignKeys(session);
  if (shouldInitializeSelectionCriteria()) {
    initializeSelectionCriteria(session);
  } else {
    setShouldVerifyDelete(false);
  }
  setFields(collectFields());
}

/**
 * INTERNAL:
 * Initialize the mapping.
 */
@Override
public void initialize(AbstractSession session) throws DescriptorException {
  super.initialize(session);
  // Must build foreign keys fields.
  List foreignKeyFields = getForeignKeyFields();
  int size = foreignKeyFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField foreignKeyField = (DatabaseField)foreignKeyFields.get(index);
    foreignKeyField = getDescriptor().buildField(foreignKeyField);
    foreignKeyFields.set(index, foreignKeyField);
  }
  initializeForeignKeys(session);
  if (shouldInitializeSelectionCriteria()) {
    initializeSelectionCriteria(session);
  } else {
    setShouldVerifyDelete(false);
  }
  setFields(collectFields());
}

/**
 * INTERNAL:
 * Selection criteria is created with source foreign keys and target keys.
 */
protected void initializePrivateOwnedCriteria() {
  if (!isForeignKeyRelationship()) {
    setPrivateOwnedCriteria(getSelectionCriteria());
  } else {
    Expression pkCriteria = getDescriptor().getObjectBuilder().getPrimaryKeyExpression();
    ExpressionBuilder builder = new ExpressionBuilder();
    Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", getDescriptor());
    Expression newPKCriteria = pkCriteria.rebuildOn(backRef);
    Expression twistedSelection = backRef.twist(getSelectionCriteria(), builder);
    if (getDescriptor().getQueryManager().getAdditionalJoinExpression() != null) {
      // We don't have to twist the additional join because it's all against the same node, which is our base
      // but we do have to rebuild it onto the manual query key
      Expression rebuiltAdditional = getDescriptor().getQueryManager().getAdditionalJoinExpression().rebuildOn(backRef);
      if (twistedSelection == null) {
        twistedSelection = rebuiltAdditional;
      } else {
        twistedSelection = twistedSelection.and(rebuiltAdditional);
      }
    }
    setPrivateOwnedCriteria(newPKCriteria.and(twistedSelection));
  }
}

/**
 * INTERNAL:
 * Selection criteria is created with source foreign keys and target keys.
 */
protected void initializePrivateOwnedCriteria() {
  if (!isForeignKeyRelationship()) {
    setPrivateOwnedCriteria(getSelectionCriteria());
  } else {
    Expression pkCriteria = getDescriptor().getObjectBuilder().getPrimaryKeyExpression();
    ExpressionBuilder builder = new ExpressionBuilder();
    Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", getDescriptor());
    Expression newPKCriteria = pkCriteria.rebuildOn(backRef);
    Expression twistedSelection = backRef.twist(getSelectionCriteria(), builder);
    if (getDescriptor().getQueryManager().getAdditionalJoinExpression() != null) {
      // We don't have to twist the additional join because it's all against the same node, which is our base
      // but we do have to rebuild it onto the manual query key
      Expression rebuiltAdditional = getDescriptor().getQueryManager().getAdditionalJoinExpression().rebuildOn(backRef);
      if (twistedSelection == null) {
        twistedSelection = rebuiltAdditional;
      } else {
        twistedSelection = twistedSelection.and(rebuiltAdditional);
      }
    }
    setPrivateOwnedCriteria(newPKCriteria.and(twistedSelection));
  }
}

/**
 * INTERNAL:
 * Selection criteria is created with source foreign keys and target keys.
 */
protected void initializePrivateOwnedCriteria() {
  if (!isForeignKeyRelationship()) {
    setPrivateOwnedCriteria(getSelectionCriteria());
  } else {
    Expression pkCriteria = getDescriptor().getObjectBuilder().getPrimaryKeyExpression();
    ExpressionBuilder builder = new ExpressionBuilder();
    Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", getDescriptor());
    Expression newPKCriteria = pkCriteria.rebuildOn(backRef);
    Expression twistedSelection = backRef.twist(getSelectionCriteria(), builder);
    if (getDescriptor().getQueryManager().getAdditionalJoinExpression() != null) {
      // We don't have to twist the additional join because it's all against the same node, which is our base
      // but we do have to rebuild it onto the manual query key
      Expression rebuiltAdditional = getDescriptor().getQueryManager().getAdditionalJoinExpression().rebuildOn(backRef);
      if (twistedSelection == null) {
        twistedSelection = rebuiltAdditional;
      } else {
        twistedSelection = twistedSelection.and(rebuiltAdditional);
      }
    }
    setPrivateOwnedCriteria(newPKCriteria.and(twistedSelection));
  }
}