S2DataSet

インターフェースを考えてみました。
S2はほんとうにインターフェース駆動プログラミング(IDD)だ。(笑

public interface DataSet {

  public int getTableSize();	

  public String getTableName(int index);	

  public DataTable getTable(String tableName)

    throws TableNotFoundRuntimeException;	

  public DataTable getTable(int index);	

  public DataTable addTable(String tableName);	

  public DataTable addTable(DataTable table);	

  public DataTable removeTable(String tableName)

    throws TableNotFoundRuntimeException;		

  public DataTable removeTable(int index);	

  public DataTable removeTable(DataTable table)

    throws TableNotFoundRuntimeException;

}

public interface DataTable {

  public String getTableName();	

  public void setTableName(String tableName);	

  public int getRowSize();	

  public DataRow getRow(int index);	

  public DataRow addRow();	

  public int getRemovedRowSize();	

  public DataRow getRemovedRow(int index);

  //DataRow.remove()されたデータは、このメソッドで

  //DataTableから削除される

  public DataRow[] removeRows();

  public int getColumnSize();	

  public DataColumn getColumn(int index);	

  public DataColumn getColumn(String columnName)

    throws ColumnNotFoundRuntimeException;	

  public String getColumnName(int index);	

  public ColumnType getColumnType(int index);	

  public DataColumn addColumn(String columnName,

    ColumnType columnType);

}

public interface DataRow {

  public Object getValue(int index);

  public Object getValue(String columnName)

    throws ColumnNotFoundRuntimeException;	

  public void setValue(int index, Object value);	

  public void setValue(String columnName, Object value)

    throws ColumnNotFoundRuntimeException;		

  public DataTable getTable();	

  public RowState getState();	

  public void setState(RowState rowState);	

  public void remove();

}

public interface RowStates {

  public RowState UNCHANGED = new UnchangedState();

  public RowState CREATED = new CreatedState();

  public RowState MODIFIED = new ModifiedState();

  public RowState REMOVED = new RemovedState();

}

public interface DataColumn {

  public String getColumnName();	

  public ColumnType getColumnType();	

  public boolean isPrimaryKey();	

  public void setPrimaryKey(boolean primaryKey);	

  public boolean isWritable();	

  public void setWritable(boolean writable);

}

public interface ColumnTypes {

  public ColumnType STRING = new StringType();

  public ColumnType BIGDECIMAL = new BigDecimalType();

  public ColumnType TIMESTAMP = new TimestampType();

  public ColumnType BINARY = new BinaryType();

}

public interface TableReader {

  public DataTable read();

}

public interface TableWriter {

  public void write(DataTable table);

}

class SqlTableReader implements TableReader {

  public void setDataSource(DataSource dataSource) {

    ...

  }

  public void setSql(String sql) {

    ...

  }

  public DataTable read() {

    ...

    return table;

  }

}

class SqlTableWriter implements TableWriter {

  public void setDataSource(DataSource dataSource) {

    ...

  }

  public void write(DataTable table) {

    ...

  }

}

結構本格的かも(笑)。
Select文は自分で書きたいけど、更新はフレームワークに任せたいって
人向きですね。