org.onosproject.ui.table

Class TableRequestHandler

java.lang.Object

org.onosproject.ui.RequestHandler

org.onosproject.ui.table.TableRequestHandler

public abstract class TableRequestHandler
extends RequestHandler

Message handler specifically for table views.

Field Summary

Fields inherited from class org.onosproject.ui.RequestHandler

MAPPER

Constructor Summary

Constructors

Constructor and Description
TableRequestHandler(String reqType, String respType, String nodeName) Constructs a table request handler for a specific table view.

Method Summary

Modifier and Type	Method and Description
protected void	addTableConfigAnnotations(TableModel tm, com.fasterxml.jackson.databind.node.ObjectNode payload) Adds table configuration specific annotations to table model.
protected TableModel	createTableModel() Creates the table model (devoid of data) using getColumnIds() to initialize it, ready to be populated.
protected String	defaultColumnId() Returns the default column ID to be used when one is not supplied in the payload as the column on which to sort.
protected abstract String[]	getColumnIds() Subclasses should return the array of column IDs with which to initialize their table model.
protected abstract String	noRowsMessage(com.fasterxml.jackson.databind.node.ObjectNode payload) Subclasses should return the message to display in the table when there are no rows to display.
protected abstract void	populateTable(TableModel tm, com.fasterxml.jackson.databind.node.ObjectNode payload) Subclasses should populate the table model by adding rows.
void	process(com.fasterxml.jackson.databind.node.ObjectNode payload) Processes the incoming message payload from the client.

Methods inherited from class org.onosproject.ui.RequestHandler

bool, chain, eventType, get, number, sendMessage, sendMessage, string, string

Methods inherited from class java.lang.Object

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

Constructor Detail

TableRequestHandler

public TableRequestHandler(String reqType,
                           String respType,
                           String nodeName)

Constructs a table request handler for a specific table view. When table requests come in, the handler will generate the appropriate table rows, sort them according the the request sort parameters, and send back the response to the client.

Parameters:

reqType - type of the request event

respType - type of the response event

nodeName - name of JSON node holding row data

Method Detail

process

public void process(com.fasterxml.jackson.databind.node.ObjectNode payload)

Description copied from class: RequestHandler

Processes the incoming message payload from the client.

Specified by:

process in class RequestHandler

Parameters:

payload - request message payload

createTableModel

protected TableModel createTableModel()

Creates the table model (devoid of data) using getColumnIds() to initialize it, ready to be populated.

This default implementation returns a table model with default formatters and comparators for all columns.

Returns:

an empty table model

addTableConfigAnnotations

protected void addTableConfigAnnotations(TableModel tm,
                                         com.fasterxml.jackson.databind.node.ObjectNode payload)

Adds table configuration specific annotations to table model.

Parameters:

tm - a table model

payload - the event payload from the client

defaultColumnId

protected String defaultColumnId()

Returns the default column ID to be used when one is not supplied in the payload as the column on which to sort.

This default implementation returns "id".

Returns:

default sort column identifier

getColumnIds

protected abstract String[] getColumnIds()

Subclasses should return the array of column IDs with which to initialize their table model.

Returns:

the column IDs

noRowsMessage

protected abstract String noRowsMessage(com.fasterxml.jackson.databind.node.ObjectNode payload)

Subclasses should return the message to display in the table when there are no rows to display. For example, a host table might return "No hosts found".

Parameters:

payload - request payload

Returns:

the message

populateTable

protected abstract void populateTable(TableModel tm,
                                      com.fasterxml.jackson.databind.node.ObjectNode payload)

Subclasses should populate the table model by adding rows.

     tm.addRow()
         .cell(COL_ONE, ...)
         .cell(COL_TWO, ...)
         ... ;
 

The request payload is provided in case there are request filtering parameters (other than sort column and sort direction) that are required to generate the appropriate data.

Parameters:

tm - the table model

payload - request payload