de.agilecoders.wicket.util

Class Json

java.lang.Object

de.agilecoders.wicket.util.Json

public final class Json
extends Object

Helper functions to handle JsonNode values.

Author:

miha

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Json.ParseException Json parser runtime exception.

Method Summary

Methods

Modifier and Type	Method and Description
static <T> T	fromJson(org.codehaus.jackson.JsonNode json, Class<T> clazz) Convert a JsonNode to a Java value
static <T> T	fromJson(String json, Class<T> clazz) Convert a JsonNode to a Java value
static <T> T	fromJson(String json, org.codehaus.jackson.type.JavaType type) Convert a string to a Java value
static boolean	isValid(String json) verifies a valid json string
static org.codehaus.jackson.node.ObjectNode	newObject() Creates a new empty ObjectNode.
static org.codehaus.jackson.JsonNode	parse(String jsonString) Parse a String representing a json, and return it as a JsonNode.
static String	stringify(org.codehaus.jackson.JsonNode json) Convert a JsonNode to its string representation.
static String	stringify(Object data) Convert an object to a json string representation.
static org.codehaus.jackson.JsonNode	toJson(Object data) Convert an object to JsonNode.

Methods inherited from class java.lang.Object

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

Method Detail

toJson

public static org.codehaus.jackson.JsonNode toJson(Object data)

Convert an object to JsonNode.

Parameters:

data - Value to convert in Json.

Returns:

creates a new json object from given data object

Throws:

Json.ParseException - to runtime if object can't be parsed

fromJson

public static <T> T fromJson(org.codehaus.jackson.JsonNode json,
             Class<T> clazz)

Convert a JsonNode to a Java value

Type Parameters:

T - type of return object

Parameters:

json - Json value to convert.

clazz - Expected Java value type.

Returns:

casted value of given json object

Throws:

Json.ParseException - to runtime if json node can't be casted to clazz.

fromJson

public static <T> T fromJson(String json,
             org.codehaus.jackson.type.JavaType type)

Convert a string to a Java value

Type Parameters:

T - type of return object

Parameters:

json - Json value to convert.

type - Expected Java value type.

Returns:

casted value of given json object

Throws:

Json.ParseException - to runtime if json node can't be casted to clazz.

fromJson

public static <T> T fromJson(String json,
             Class<T> clazz)

Convert a JsonNode to a Java value

Type Parameters:

T - type of return object

Parameters:

json - Json value to convert.

clazz - Expected Java value type.

Returns:

casted value of given json object

newObject

public static org.codehaus.jackson.node.ObjectNode newObject()

Creates a new empty ObjectNode.

Returns:

a new empty json object.

stringify

public static String stringify(org.codehaus.jackson.JsonNode json)

Convert a JsonNode to its string representation. If given value is null an empty json object will returned.

Parameters:

json - The json object to stringify

Returns:

stringified version of given json object

stringify

public static String stringify(Object data)

Convert an object to a json string representation. If given value is null an empty json object will returned.

Parameters:

data - The data object to stringify

Returns:

stringified version of given json object

isValid

public static boolean isValid(String json)

verifies a valid json string

Parameters:

json - The json string

Returns:

true, if string is a valid json string

parse

public static org.codehaus.jackson.JsonNode parse(String jsonString)

Parse a String representing a json, and return it as a JsonNode.

Parameters:

jsonString - string to parse

Returns:

parsed json string as json node

Throws:

Json.ParseException - to runtime if json string can't be parsed