com.whitestein.lsps.json.impl

Class JsonGenericParser

java.lang.Object

com.whitestein.lsps.json.impl.JsonGenericParser

All Implemented Interfaces:

ValueConverter

public class JsonGenericParser
extends Object

A generic parser which constructs a generic data structure out of the json string. The generic data structure does not use record types. Complex data structures are represented as maps or lists.

Author:

jsa

Constructor Summary

Constructors

Constructor and Description
JsonGenericParser()

Method Summary

Modifier and Type	Method and Description
Object	parse(String json, Namespace namespace, Module langModule) Parses the JSON string and produces LSPS objects out of it.
com.fasterxml.jackson.databind.JsonNode	toNode(Object object, com.whitestein.lsps.json.impl.WriteContext context) Converts an LSPS object to a JsonNode.
Object	toObject(com.fasterxml.jackson.databind.JsonNode node, com.whitestein.lsps.json.impl.ParseContext context) Creates an object from JsonNode.

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonGenericParser

public JsonGenericParser()

Method Detail

parse

public Object parse(String json,
                    Namespace namespace,
                    Module langModule)

Parses the JSON string and produces LSPS objects out of it. It accepts JSON string representing a record or a collection of records.

Parameters:

json - The JSON string.

namespace - The name space in which the objects should be created.

langModule - the language module of the process model

Returns:

LSPS object

toObject

public Object toObject(com.fasterxml.jackson.databind.JsonNode node,
                       com.whitestein.lsps.json.impl.ParseContext context)
                throws JsonProcessingException

Description copied from interface: ValueConverter

Creates an object from JsonNode. It does not create LSPS objects directly. The returned object can be java.util.List, a java.util.Set, java.util.Map, RecordData or Reference. The returned object which can represent a complex data structure has to be processed further prior to converting it to LSPS objects. If this node is a root node of the JSON document then after this method is returned it is necessary to call ParseContext.resolveReferences(Object) to resolve all found references. Once all the references are resolved the returned object can be easily converted to LSPS object following this mappings:

Object	LSPS
RecordData	RecordHolder
Set	SetHolder
List	ListHolder
Map	MapHolder
simple types	simple types

Parameters:

node - the JSON node

context - the parsing context

Returns:

an object easily convertible to LSPS object

Throws:

JsonProcessingException - if the JsonNode cannot be converted to a LSPS object.

toNode

public com.fasterxml.jackson.databind.JsonNode toNode(Object object,
                                                      com.whitestein.lsps.json.impl.WriteContext context)
                                               throws JsonProcessingException

Description copied from interface: ValueConverter

Converts an LSPS object to a JsonNode.

Parameters:

object - the object that should be written in the JSON string

context - the writing context

Returns:

a node representation for the JSON tree.

Throws:

JsonProcessingException - if the object cannot be converted to the JsonNode.