Examples of org.xorm.datastore.Row

org.xorm.datastore.Row
A row represents a single instance of a data object. The structure of a Row is defined by its reference to a Table. The terms Row and Table could be changed to "Data Object" and "Datatype"; they were chosen to correspond to a relational database notion but are in no way tied to any particular implementation. A Row contains only primitive values; that is, there are no references to first class objects. When used with a relational database, an instance of the Row class is meant to correspond exactly with a single row in a database table. Foreign keys and primary keys are typically expressed as numeric IDs. Each instance of a Row tracks values for each Column specified for a Table. The column values may or may not have been loaded from persistent storage. This can be tested for using the containsValue() method. If the value has been set -- even to null -- containsValue() will return "true". A row also tracks dirty bits for each Column. A value is said to be dirty if it has been changed since the first time it was set. DatastoreDriver implementations are encouraged to use this information to optimize the update() operation. Finally, a Row is said to be "hollow" if no values other than the primary key have been set. Because it is possible to have a Table without a primary key (for example, a many-to-many table in a relational database), the getPrimaryKeyValue() method is not guaranteed to return a value.

    }


    /** Initializes or retrieves the working Row. */
    public Row getRow() {
        if (row == null) {
            row = new Row(mapping.getTable());
            initDefaultValues();
        }
        return row;
    }

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                    }
                    if (otherHandler.isHollow()) {
                        otherHandler.refresh(otherHandler.txn.getInterfaceManager());
                    }
                    
                    Row myRow = row;
                    Row otherRow = otherHandler.row;
                    if (!row.equals(otherHandler.row)) {
                        return false;
                    }
                    // TODO check relationships?
                    return true;

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                    }
                }
            }
        }


        Row theRow = getRow();
        // Gotta see if we're dealing with a cached instance of the Row
        if (theRow.isCached()) {
            // Yep, let's not modify that instance...now we need to clone.
            theRow = (Row)theRow.clone();
            // Make sure the cached flag is set to false on our copy
            theRow.setCached(false);
            // Update our instance variable or whatever
            setRow(theRow);
        }


        if (txn != null && txn.isActive() && !isDirty()) {
            makeDirty();
        }
        theRow.setValue(c,value);
    }

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            // Column fault: column was not in default fetch group
            DataFetchGroup dfg = new DataFetchGroup();
            dfg.addColumn(c);
            if (getRow().isCached()) {
                // We need to clone the row so we don't modify the cached Row
                Row theRow = (Row)getRow().clone();
                theRow.setCached(false);
                setRow(theRow);
            }
            txn.getInterfaceManager().refreshColumns(getRow(), dfg);
        }
        Object value = getRow().getValue(c);

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  if (xmlResults == null) return rows;  // no results


  Iterator i = xmlResults.iterator();
  while (i.hasNext()) {
      Element element = (Element) i.next();
      Row row = new Row(table);
      populate(row, element);
      rows.add(row);
  }
  return rows;
    }

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        ArrayList list = new ArrayList();
        if (selector.getCondition() instanceof SimpleCondition) {
            SimpleCondition condition = (SimpleCondition) selector.getCondition();
            Table table = selector.getTable();
            Object primaryKey = condition.getValue();
            Row found = factory.getCache().get(table, primaryKey);
            if (found != null) {
                list.add((Row) found.clone());
            }
        }
        return list;
    }

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         *   that are not instances of org.xorm.Row.
         */
        public void addAll(Collection rows) {
            Iterator i = rows.iterator();
            while (i.hasNext()) {
                Row row = (Row) i.next();
                add(row);
            }
        }

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        if (primaryKey instanceof TransientKey) {
            return null;
        }


        // Return hollow object
        Row row = new Row(classMapping.getTable(), primaryKey);
        proxy = rowToProxy(classMapping, row);
        return proxy;
    }

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    void addToCache(Collection rows) {
        DataCache cache = factory.getCache();
        if (cache != null) {
            Iterator i = rows.iterator();
            while (i.hasNext()) {
                Row row = (Row) i.next();
                // Don't need to clone anymore...cached flag instead
                //cache.add((Row) row.clone());
                cache.add(row);
            }
        }

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    }


    Row getFromCache(Table table, Object primaryKey) {
        DataCache cache = factory.getCache();
        if (cache != null) {
            Row row = cache.get(table, primaryKey);
            return row;
        } else {
            return null;
        }
    }

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