org.calrissian.mango.json.mappings

Class JsonAttributeMappings

java.lang.Object

org.calrissian.mango.json.mappings.JsonAttributeMappings

public class JsonAttributeMappings
extends Object

Utility methods for 1) Flattening a raw nested json string into a AttributeStore object, and 2) Re-expanding a flattened json object from a AttributeStore back into a raw nested json string. NOTE: It's important that the flatting/re-expansion only be done through these methods. Metadata is added to various attributes in the flattened representation which acts as a guide for re-expansion. If this metadata is missing or tampered with externally, this class will yield unexpected results.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JsonAttributeMappings.FlattenedLevelsComparator This comparator is used to sort a list of attributes that represent flattened json so that raw json can be reconstructed with array sort order already in tact.

Method Summary

Modifier and Type	Method and Description
static Collection<org.calrissian.mango.domain.Attribute>	fromJson(com.fasterxml.jackson.databind.node.ObjectNode object) Flattens a raw nested json string representation into a collection of attributes.
static Collection<org.calrissian.mango.domain.Attribute>	fromJson(String json, com.fasterxml.jackson.databind.ObjectMapper objectMapper) Flattens a raw nested json string representation into a collection of attributes.
static Collection<org.calrissian.mango.domain.Attribute>	fromMap(Map<String,Object> map) Flattens a Map into a collection of attributes.
static String	toJsonString(Collection<org.calrissian.mango.domain.Attribute> attributeCollection, com.fasterxml.jackson.databind.ObjectMapper objectMapper) Re-expands a flattened json representation from a collection of attributes back into a raw nested json string.
static Map<String,Object>	toObject(Collection<org.calrissian.mango.domain.Attribute> attributeCollection) Re-expands a nested attribute representation from a collection of attributes back into a nested java object representation (objects become Map, arrays become Lists, and non-containers stay the same).

Methods inherited from class java.lang.Object

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

Method Detail

fromJson

public static Collection<org.calrissian.mango.domain.Attribute> fromJson(com.fasterxml.jackson.databind.node.ObjectNode object)
                                                                  throws IOException

Flattens a raw nested json string representation into a collection of attributes.

Throws:

IOException

fromJson

public static Collection<org.calrissian.mango.domain.Attribute> fromJson(String json,
                                                                         com.fasterxml.jackson.databind.ObjectMapper objectMapper)
                                                                  throws IOException

Flattens a raw nested json string representation into a collection of attributes. This method has the same effect as fromJson(com.fasterxml.jackson.databind.node.ObjectNode), except it takes a json as a string and a configured object mapper instance.

Throws:

IOException

fromMap

public static Collection<org.calrissian.mango.domain.Attribute> fromMap(Map<String,Object> map)

Flattens a Map into a collection of attributes. This allows objects which have already been parsed from json strings and processed to be turned into attribute stores as well.

toJsonString

public static String toJsonString(Collection<org.calrissian.mango.domain.Attribute> attributeCollection,
                                  com.fasterxml.jackson.databind.ObjectMapper objectMapper)
                           throws com.fasterxml.jackson.core.JsonProcessingException

Re-expands a flattened json representation from a collection of attributes back into a raw nested json string.

Throws:

com.fasterxml.jackson.core.JsonProcessingException

toObject

public static Map<String,Object> toObject(Collection<org.calrissian.mango.domain.Attribute> attributeCollection)

Re-expands a nested attribute representation from a collection of attributes back into a nested java object representation (objects become Map, arrays become Lists, and non-containers stay the same). NOTE: It is possible that this method could fail in the case where attributes were added to a attribute collection which changed from a primitive type to a container type, from one container type to another, or vice versa.