uk.org.ogsadai.client.toolkit.activity.sql
Class ResultsetProjection

java.lang.Object
  |
  +--uk.org.ogsadai.client.toolkit.activity.RequestComponent
        |
        +--uk.org.ogsadai.client.toolkit.activity.Activity
              |
              +--uk.org.ogsadai.client.toolkit.activity.sql.ResultsetProjection

public class ResultsetProjection

extends Activity

This activity projects data referenced in a Resultset onto a column specified by name or index.

The activity has one input - the Resultset - and one output - the projected values.

Author:

The OGSA-DAI Project Team

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

Copyright statement

See Also:

Constant Field Values

mColumnName

private java.lang.String mColumnName

Name of column to project onto

mColumnIndex

private int mColumnIndex

Index of column to project onto

ResultsetProjection

public ResultsetProjection(ActivityOutput input,
                           java.lang.String columnName)

Constructor.

Parameters:

input - Output from another activity which provides the resultset.

columnName - Name of column to project onto.

Throws:

java.lang.IllegalArgumentException - If input or columnName are null.

ResultsetProjection

public ResultsetProjection(ActivityOutput input,
                           int columnIndex)

Constructor.

Parameters:

input - Output from another activity which provides the resultset.

columnIndex - Index of column to project onto.

Throws:

java.lang.IllegalArgumentException - If input is null or columnIndex < 1.

setInput

public final void setInput(ActivityOutput input)

Sets the input of this activity to be the output from another activity that will provide the data to be sampled.

Parameters:

input - Output from another activity.

Throws:

java.lang.IllegalArgumentException - If input is null.

getOutput

public ActivityOutput getOutput()

Gets the activity output - the projected column values.

Returns:

the activity output

generateXML

protected java.lang.String generateXML()

Gets something useful from the result data produced by the activity, if there was any result data.

Specified by:

generateXML in class Activity

Returns:

something useful

Throws:

DataFormatException - if the result data is not in the expected format

NoActivityOutputException - if there is no result data for this activity.