Module com.github.hazendaz.parent
Package org.csveed.bean

Class DynamicColumn

java.lang.Object
org.csveed.bean.DynamicColumn
public class DynamicColumn extends Object

The concept of dynamic columns comes into play when a sheet contains columns that are not really part of the columns, but should have been separate rows. For example, let's say you have a table that looks like this:

| name | town | jan 14 | jan 15 | jan 16 | | Rob | Leiden | 4 | 1 | 7 | | Rob | Delft | 0 | 3 | 8 | | Erik | Leiden | 2 | 4 | 1 | | Erik | Sneek | 1 | 0 | 9 |

Let's say you want to compact this table into the following, normalized format: | name | town | date | visits | | Rob | Leiden | jan 14 | 4 | | Rob | Leiden | jan 15 | 1 | | Rob | Leiden | jan 16 | 7 | | Rob | Delft | jan 14 | 0 | | Rob | Delft | jan 15 | 3 | | Rob | Delft | jan 16 | 8 | | Erik | Leiden | jan 14 | 2 | | Erik | Leiden | jan 15 | 4 | | Erik | Leiden | jan 16 | 1 | | Erik | Sneek | jan 14 | 1 | | Erik | Sneek | jan 15 | 0 | | Erik | Sneek | jan 16 | 9 |

In order to realize this goal, you need to make that startIndexDynamicColumns is set to 3 on @CsvFile. This will assume the columns starting with the third and all thereafter are dynamic. For every dynamic column, a new bean will be created. All static columns will be copied into every created bean.

The header name and the cell value can be copied into bean properties. In the example, the bean requires two fields date and visits. date must be annotated with @CsvHeaderName and visits with @CsvHeaderValue.

  • Constructor Details

    • DynamicColumn

      public DynamicColumn(Column configuredStartColumn)
      Instantiates a new dynamic column.
      Parameters:
      configuredStartColumn - the configured start column

  • Method Details

    • checkForReset

      public void checkForReset(int numberOfColumns)
      Check for reset.
      Parameters:
      numberOfColumns - the number of columns

    • reset

      protected void reset()
      Reset.

    • lastDynamicColumnPassed

      protected boolean lastDynamicColumnPassed(int numberOfColumns)
      Last dynamic column passed.
      Parameters:
      numberOfColumns - the number of columns
      Returns:
      true, if successful

    • atFirstDynamicColumn

      public boolean atFirstDynamicColumn()
      At first dynamic column.
      Returns:
      true, if successful

    • advanceDynamicColumn

      public void advanceDynamicColumn()
      Advance dynamic column.

    • isDynamicColumnActive

      public boolean isDynamicColumnActive(Column currentColumn)
      Checks if is dynamic column active.
      Parameters:
      currentColumn - the current column
      Returns:
      true, if is dynamic column active