uk.org.ogsadai.client.toolkit.activity.transform
Class WebRowSetProjection

java.lang.Object
  |
  +--uk.org.ogsadai.client.toolkit.activity.RequestComponent
        |
        +--uk.org.ogsadai.client.toolkit.activity.Activity
              |
              +--uk.org.ogsadai.client.toolkit.activity.transform.WebRowSetProjection

public class WebRowSetProjection

extends Activity

This activity projects data in WebRowSet XML format onto a column specified by name or index.

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

Author:

The OGSA-DAI Project Team

Field Summary

private static java.lang.String	COPYRIGHT_NOTICE Copyright statement
private int	mColumnIndex Index of column to project onto
private java.lang.String	mColumnName Name of column to project onto

Fields inherited from class uk.org.ogsadai.client.toolkit.activity.Activity

Fields inherited from class uk.org.ogsadai.client.toolkit.activity.RequestComponent

Constructor Summary

WebRowSetProjection(ActivityOutput input, int columnIndex)
Constructor.

WebRowSetProjection(ActivityOutput input, java.lang.String columnName)
Constructor.

Method Summary

protected java.lang.String	generateXML() Gets something useful from the result data produced by the activity, if there was any result data.
ActivityOutput	getOutput() Gets the activity output - the projected column values.
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.

Methods inherited from class uk.org.ogsadai.client.toolkit.activity.Activity

addInput, addOutput, addOutputs, getDataResourceID, getInputParameters, getOutputParameters, getOutputs, replaceSpecialCharacters, setDataResourceID, setInput

Methods inherited from class uk.org.ogsadai.client.toolkit.activity.RequestComponent

getDataService, getName, getSession, setDataService, setSession

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

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

Constructor Detail

WebRowSetProjection

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

Constructor.

Parameters:

input - Output from another activity which provides the WebRowSet.

columnName - Name of column to project onto.

Throws:

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

WebRowSetProjection

public WebRowSetProjection(ActivityOutput input,
                           int columnIndex)

Constructor.

Parameters:

input - Output from another activity which provides the WebRowSet.

columnIndex - Index of column to project onto.

Throws:

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

Method Detail

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.