How to use

getLockFieldsByTable

method

in

org.eclipse.persistence.descriptors.SelectedFieldsLockingPolicy

/**
 * INTERNAL: It is responsible for initializing the policy;
 */
@Override
public void initialize(AbstractSession session) {
  super.initialize(session);
  List<DatabaseField> lockFields = getLockFields();
  int size = lockFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField field = lockFields.get(index);
    field = descriptor.buildField(field);
    lockFields.set(index, field);
    List<DatabaseField> fieldsForTable = getLockFieldsByTable().get(field.getTable());
    if (fieldsForTable == null) {
      fieldsForTable = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
      getLockFieldsByTable().put(field.getTable(), fieldsForTable);
    }
    fieldsForTable.add(field);
  }
}

/**
 * INTERNAL: It is responsible for initializing the policy;
 */
@Override
public void initialize(AbstractSession session) {
  super.initialize(session);
  List<DatabaseField> lockFields = getLockFields();
  int size = lockFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField field = lockFields.get(index);
    field = descriptor.buildField(field);
    lockFields.set(index, field);
    List<DatabaseField> fieldsForTable = getLockFieldsByTable().get(field.getTable());
    if (fieldsForTable == null) {
      fieldsForTable = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
      getLockFieldsByTable().put(field.getTable(), fieldsForTable);
    }
    fieldsForTable.add(field);
  }
}

/**
 * INTERNAL:
 * It is responsible for initializing the policy;
 */
public void initialize(AbstractSession session) {
  super.initialize(session);
  List lockFields = getLockFields();
  int size = lockFields.size();
  for (int index = 0; index < size; index++) {
    DatabaseField field = (DatabaseField)lockFields.get(index);
    field = descriptor.buildField(field);
    lockFields.set(index, field);
    Vector fieldsForTable = (Vector)getLockFieldsByTable().get(field.getTable());
    if (fieldsForTable == null) {
      fieldsForTable = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
      getLockFieldsByTable().put(field.getTable(), fieldsForTable);
    }
    fieldsForTable.addElement(field);
  }
}

/**
 * INTERNAL:
 * Values to be included in the locking mechanism are added to the translation row.
 * For changed fields the normal build row is ok as only changed fields matter.
 */
public void addLockValuesToTranslationRow(ObjectLevelModifyQuery query) throws DatabaseException{
  Object object;
  verifyUsage(query.getSession());
  if (query.isDeleteObjectQuery()) {
    object = query.getObject();
  } else {
    object = query.getBackupClone();
  }
  for (Iterator vectors = getLockFieldsByTable().values().iterator(); vectors.hasNext();) {
    for (Enumeration fields = ((Vector)vectors.next()).elements();
         fields.hasMoreElements();) {
      DatabaseField field = (DatabaseField)fields.nextElement();
      DatabaseMapping mapping = descriptor.getObjectBuilder().getMappingForField(field);
      //Bug5892889, Exception will be thrown if no matched database field found
      if(mapping == null ){
        throw DatabaseException.specifiedLockingFieldsNotFoundInDatabase(field.getQualifiedName());
      }else{
        mapping.writeFromObjectIntoRow(object, query.getTranslationRow(), query.getSession());
      }
    }
  }
}

for (Iterator<List<DatabaseField>> fields = getLockFieldsByTable().values().iterator(); fields.hasNext();) {
  for (DatabaseField field : fields.next()) {
    DatabaseMapping mapping = descriptor.getObjectBuilder().getMappingForField(field);

for (Iterator<List<DatabaseField>> fields = getLockFieldsByTable().values().iterator(); fields.hasNext();) {
  for (DatabaseField field : fields.next()) {
    DatabaseMapping mapping = descriptor.getObjectBuilder().getMappingForField(field);