io.stallion.requests.validators

Class ParamExtractor<T>

java.lang.Object

io.stallion.requests.validators.ParamExtractor<T>

Type Parameters:

T -

public class ParamExtractor<T>
extends Object

A helper class for extracting required parameters from a user provided hashmap. So instead of doing: Map params = request().getBodyMap(); String code = params.getOrDefault("code", null); if (empty(code)) { throw new ClientException("Could not find required parameter: code"); } String redirectUri = params.getOrDefault("redirectUri", null); if (empty(code)) { throw new ClientException("Could not find required parameter: redirectUri"); } You do: ParamExtractor<String> params = new ParamExtractor(request().getBodyMap(), "Required post body parameter {0} was not found."); String code = params.get("code"); String redirectUri = params.get("redirect_uri"); And the exception with proper messaging automatically gets bubbled up to the user if the parameter is empty.

Constructor Summary

Constructors

Constructor and Description
ParamExtractor(Map<Object,T> map)
ParamExtractor(Map map, String messageTemplate)

Method Summary

Modifier and Type	Method and Description
<T> ParamExtractor<T>	fromRequest() New RequiredParamMapper from the current request body.
T	get(Object key) Gets the parameter, throws a ClientException 400 error with the message template if the parameter is empty.

Methods inherited from class java.lang.Object

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

Constructor Detail

ParamExtractor

public ParamExtractor(Map<Object,T> map)

ParamExtractor

public ParamExtractor(Map map,
                      String messageTemplate)

Parameters:

map -

messageTemplate - - Formatted using MessageFormat use {0} for the parameter name.

Method Detail

fromRequest

public <T> ParamExtractor<T> fromRequest()

New RequiredParamMapper from the current request body.

Type Parameters:

T -

Returns:

get

public T get(Object key)

Gets the parameter, throws a ClientException 400 error with the message template if the parameter is empty.

Parameters:

key -

Returns: