com.sappenin.utils.json

Class JsonUtils.Impl

java.lang.Object

com.sappenin.utils.json.JsonUtils.Impl

All Implemented Interfaces:

JsonUtils

Enclosing interface:

JsonUtils

public static class JsonUtils.Impl
extends Object
implements JsonUtils

An implementation of JsonUtils.

Author:

dfuelling

Nested Class Summary

Nested classes/interfaces inherited from interface com.sappenin.utils.json.JsonUtils

JsonUtils.Impl

Field Summary

Fields

Modifier and Type	Field and Description
protected static Logger	logger

Constructor Summary

Constructors

Constructor and Description
JsonUtils.Impl(com.fasterxml.jackson.databind.ObjectMapper objectMapper) Required-Args constructor

Method Summary

Methods

Modifier and Type	Method and Description
<P> P	fromJson(javax.servlet.http.HttpServletRequest httpServletRequest, JsonUtilsClassTypeMapper jsonUtilsClassTypeMapper) Convert the body of an HttpServletRequest into an of the proper type as based upon an instance of JsonUtilsClassTypeMapper.
<P> P	fromJson(com.fasterxml.jackson.databind.JsonNode jsonNode, Class<P> jsonNodeClass) Convert a JsonNode into an object of the proper type as found in the "@class" directive in the JsonNode.
<P> P	fromJson(com.fasterxml.jackson.databind.JsonNode jsonNode, JsonUtilsClassTypeMapper jsonUtilsClassTypeMapper) Convert the body of an HttpServletRequest into an of the proper type as based upon an instance of JsonUtilsClassTypeMapper.
protected com.fasterxml.jackson.databind.JsonNode	getRequestPayloadAsJsonNode(javax.servlet.http.HttpServletRequest request) Retrieves the JsonNode from the request.
protected String	getRequestPayloadAsJsonString(javax.servlet.http.HttpServletRequest httpServletRequest) Helper method to grab a Json Payload from an HttpServletRequest by forwarding to getRequestPayloadAsJsonString(InputStream).
protected String	getRequestPayloadAsJsonString(InputStream inputStream) Helper method to grab a Json Payload from an InputStream.
<T> String	toJson(T payload) Convert an object of type
<P> String	toJsonUnchecked(P payload) Convert an object of type

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final Logger logger

Constructor Detail

JsonUtils.Impl

public JsonUtils.Impl(com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Required-Args constructor

Parameters:

objectMapper -

Method Detail

toJson

public <T> String toJson(T payload)
              throws com.fasterxml.jackson.core.JsonProcessingException

Description copied from interface: JsonUtils

Convert an object of type

into a Json String.

Specified by:

toJson in interface JsonUtils

Parameters:

payload -

Returns:

Throws:

com.fasterxml.jackson.core.JsonProcessingException

toJsonUnchecked

public <P> String toJsonUnchecked(P payload)
                       throws RuntimeException

Description copied from interface: JsonUtils

Convert an object of type

into a Json String. Catch any exceptions of type JsonProcessingException and throw them as RuntimeException.

Specified by:

toJsonUnchecked in interface JsonUtils

Returns:

Throws:

RuntimeException

fromJson

public <P> P fromJson(com.fasterxml.jackson.databind.JsonNode jsonNode,
             JsonUtilsClassTypeMapper jsonUtilsClassTypeMapper)
           throws ClassNotFoundException

Description copied from interface: JsonUtils

Convert the body of an HttpServletRequest into an of the proper type as based upon an instance of JsonUtilsClassTypeMapper.

Specified by:

fromJson in interface JsonUtils

Parameters:

jsonNode - A JsonNode to deserialize into a Java object.

jsonUtilsClassTypeMapper - An instance of JsonUtilsClassTypeMapper to map the incoming JSON payload to a typed Java class.

Returns:

Throws:

ClassNotFoundException

fromJson

public <P> P fromJson(com.fasterxml.jackson.databind.JsonNode jsonNode,
             Class<P> jsonNodeClass)
           throws ClassNotFoundException

Description copied from interface: JsonUtils

Convert a JsonNode into an object of the proper type as found in the "@class" directive in the JsonNode.

Specified by:

fromJson in interface JsonUtils

Parameters:

jsonNode - A JsonNode to deserialize into a Java object.

jsonNodeClass - The expected Java Class to deserialize the incoming JSON payload to.

Returns:

Throws:

ClassNotFoundException

fromJson

public <P> P fromJson(javax.servlet.http.HttpServletRequest httpServletRequest,
             JsonUtilsClassTypeMapper jsonUtilsClassTypeMapper)
           throws IOException,
                  ClassNotFoundException

Description copied from interface: JsonUtils

Convert the body of an HttpServletRequest into an of the proper type as based upon an instance of JsonUtilsClassTypeMapper.

Specified by:

fromJson in interface JsonUtils

Parameters:

httpServletRequest - An HttpServletRequest with an InputStream containing a JSON payload.

jsonUtilsClassTypeMapper - An instance of JsonUtilsClassTypeMapper to map the incoming JSON payload to a typed Java class.

Returns:

Throws:

IOException

ClassNotFoundException

getRequestPayloadAsJsonNode

protected com.fasterxml.jackson.databind.JsonNode getRequestPayloadAsJsonNode(javax.servlet.http.HttpServletRequest request)
                                                                       throws IOException,
                                                                              ClassNotFoundException

Retrieves the JsonNode from the request.

Parameters:

request -

Returns:

Throws:

IOException

ClassNotFoundException

getRequestPayloadAsJsonString

protected String getRequestPayloadAsJsonString(javax.servlet.http.HttpServletRequest httpServletRequest)
                                        throws IOException

Helper method to grab a Json Payload from an HttpServletRequest by forwarding to getRequestPayloadAsJsonString(InputStream).

Parameters:

httpServletRequest - An instance of HttpServletRequest.

Returns:

Throws:

IOException

getRequestPayloadAsJsonString

protected String getRequestPayloadAsJsonString(InputStream inputStream)
                                        throws IOException

Helper method to grab a Json Payload from an InputStream. This is generally used in concert with an HttpServletRequest, but doesn't strictly need to be. Not used in this class but used by sub-classes.

Parameters:

inputStream - An instance of InputStream.

Returns:

Throws:

IOException