Field Detail

• nextFilter

  protected ConnectionFilter nextFilter

• parameters

  protected HashMap<String,Object> parameters

Constructor Detail

• ConnectionFilter

  public ConnectionFilter()

Method Detail

• setNextFilter

  public final void setNextFilter(ConnectionFilter nextFilter)

• getNextFilter

  public final ConnectionFilter getNextFilter()

• setParameters

  public final void setParameters(HashMap<String,Object> parameters)

• getParameters

  public final HashMap<String,Object> getParameters()

  Returns the input parameters of the filter.

• doFilter

  public final InputStream doFilter(InputStream in)
                             throws com.denodo.util.exceptions.InternalErrorException

  Throws:

  com.denodo.util.exceptions.InternalErrorException

• execute

  protected abstract InputStream execute(InputStream in)
                                  throws com.denodo.util.exceptions.InternalErrorException

  The Execution Engine invokes this method every time a query involves a base view of the data source that has this filter assigned.

  In this method you have to read the data of the InputStream parameter and return another InputStream with the data transformed.

  Parameters:

  an - InputStream that provides the data from the source.

  Returns:

  an InputStream that returns the data transformed by the filter.

  Throws:

  com.denodo.util.exceptions.InternalErrorException

• getVQLName

  public abstract String getVQLName()