org.wattdepot.common.util

Class GvizHelper

java.lang.Object

org.wattdepot.common.util.GvizHelper

Direct Known Subclasses:

OpenEISGvizHelper

public class GvizHelper
extends Object

GvizHelper - Utility class that handles Google Visualization using the Google Visualization Datasource library. * @see Google Visualization Datasource API

Author:

Yongwen Xu

Constructor Summary

Constructors

Constructor and Description
GvizHelper()

Method Summary

Methods

Modifier and Type	Method and Description
protected static com.google.visualization.datasource.datatable.DataTable	getDataTable(XYInterpolatedValueList list)
protected static String	getGvizDataErrorResponse(com.google.visualization.datasource.base.DataSourceException e)
static String	getGvizQueryString(org.restlet.resource.ServerResource server, String type)
static String	getGvizResponse(Object resource, String tqxString, String tqString)
protected static String	getGvizResponseFromDataTable(com.google.visualization.datasource.datatable.DataTable table, String tqxString)

Methods inherited from class java.lang.Object

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

Constructor Detail

GvizHelper

public GvizHelper()

Method Detail

getGvizQueryString

public static String getGvizQueryString(org.restlet.resource.ServerResource server,
                        String type)

Parameters:

server - the restlet ServerResource

type - type of the gviz query string, such as tqx, or tq

Returns:

the value of the gviz query string from the request

getGvizResponse

public static String getGvizResponse(Object resource,
                     String tqxString,
                     String tqString)

Parameters:

resource - server resource object

tqxString - gviz tqx query string, i.e., request id

tqString - gviz tq query string, selectable fields

Returns:

gviz response

getDataTable

protected static com.google.visualization.datasource.datatable.DataTable getDataTable(XYInterpolatedValueList list)
                                                                               throws com.google.visualization.datasource.base.DataSourceException

Parameters:

list - The XYInterpolatedValueList.

Returns:

The gviz data table.

Throws:

com.google.visualization.datasource.base.DataSourceException - if there is a data source problem.

getGvizDataErrorResponse

protected static String getGvizDataErrorResponse(com.google.visualization.datasource.base.DataSourceException e)

Parameters:

e - DataSourceException

Returns:

the error message

getGvizResponseFromDataTable

protected static String getGvizResponseFromDataTable(com.google.visualization.datasource.datatable.DataTable table,
                                  String tqxString)

Parameters:

table - gviz data table

tqxString - gviz query string

Returns:

the gviz json response