Package org.pentaho.di.trans.steps.calculator

Class CalculatorHelper

java.lang.Object

org.pentaho.di.trans.step.BaseStepHelper

org.pentaho.di.trans.steps.calculator.CalculatorHelper

All Implemented Interfaces:

StepHelperInterface

public class CalculatorHelper
extends BaseStepHelper

Field Summary

Fields inherited from class org.pentaho.di.trans.step.BaseStepHelper

IS_TRANS_REFERENCE, IS_VALID_REFERENCE, log, REFERENCE_PATH, SEPARATOR

Fields inherited from interface org.pentaho.di.trans.step.StepHelperInterface

ACTION_STATUS, FAILURE_METHOD_NOT_FOUND_RESPONSE, FAILURE_RESPONSE, STATUS, SUCCESS_RESPONSE

Constructor Summary

Constructors

Constructor	Description
CalculatorHelper()

Method Summary

Modifier and Type	Method	Description
org.json.simple.JSONObject	getCalcFields(TransMeta transMeta, Map<String,String> queryParams)	Retrieves the list of available calculation fields and returns them as a JSON object.
org.json.simple.JSONObject	getCalcTypes()	Retrieves the list of available calculation types and returns them as a JSON object.
protected org.json.simple.JSONObject	handleStepAction(String method, TransMeta transMeta, Map<String,String> queryParams)	Handles step-specific actions for Calculator.

Methods inherited from class org.pentaho.di.trans.step.BaseStepHelper

getReferencePath, isFailedResponse, stepAction, validateAndPutReferenceStatus

Methods inherited from class java.lang.Object

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

Constructor Details

CalculatorHelper

public CalculatorHelper()

Method Details

handleStepAction

protected org.json.simple.JSONObject handleStepAction(String method,
 TransMeta transMeta,
 Map<String,String> queryParams)

Handles step-specific actions for Calculator.

Specified by:

handleStepAction in class BaseStepHelper

Parameters:

method - The name of the method to execute.

transMeta - The transformation metadata associated with the step.

queryParams - A map of query parameters for the action.

Returns:

A JSON object containing the action status and any additional response data.

getCalcTypes

public org.json.simple.JSONObject getCalcTypes()

Retrieves the list of available calculation types and returns them as a JSON object.

Returns:

A JSON object containing the list of calculation types.

getCalcFields

public org.json.simple.JSONObject getCalcFields(TransMeta transMeta,
 Map<String,String> queryParams)
                                         throws org.pentaho.di.core.exception.KettleStepException

Retrieves the list of available calculation fields and returns them as a JSON object. This includes both existing calculator fields and fields from previous steps.

Parameters:

transMeta - The transformation metadata.

queryParams - A map of query parameters for the action.

Returns:

A JSON object containing the list of calculation fields.

Throws:

org.pentaho.di.core.exception.KettleStepException - if there's an error retrieving field information.