Package io.airlift.json

Class JsonCodec<T>

java.lang.Object

io.airlift.json.JsonCodec<T>

public class JsonCodec<T>
extends Object

Method Summary

Modifier and Type	Method	Description
T	fromJson(byte[] json)	Coverts the specified json bytes (UTF-8) into an instance of type T.
T	fromJson(String json)	Converts the specified json string into an instance of type T.
Type	getType()	Gets the type this codec supports.
static <T> JsonCodec<T>	jsonCodec(com.google.common.reflect.TypeToken<T> type)
static <T> JsonCodec<T>	jsonCodec(Class<T> type)
static <T> JsonCodec<List<T>>	listJsonCodec(JsonCodec<T> type)
static <T> JsonCodec<List<T>>	listJsonCodec(Class<T> type)
static <K,V> JsonCodec<Map<K,V>>	mapJsonCodec(Class<K> keyType, JsonCodec<V> valueType)
static <K,V> JsonCodec<Map<K,V>>	mapJsonCodec(Class<K> keyType, Class<V> valueType)
String	toJson(T instance)	Converts the specified instance to json.
byte[]	toJsonBytes(T instance)	Converts the specified instance to json.
Optional<String>	toJsonWithLengthLimit(T instance, int lengthLimit)	Converts the specified instance to optional json string with a length limit.

Methods inherited from class java.lang.Object

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

Method Detail

jsonCodec

public static <T> JsonCodec<T> jsonCodec(Class<T> type)

jsonCodec

public static <T> JsonCodec<T> jsonCodec(com.google.common.reflect.TypeToken<T> type)

listJsonCodec

public static <T> JsonCodec<List<T>> listJsonCodec(Class<T> type)

listJsonCodec

public static <T> JsonCodec<List<T>> listJsonCodec(JsonCodec<T> type)

mapJsonCodec

public static <K,V> JsonCodec<Map<K,V>> mapJsonCodec(Class<K> keyType,
                                                                 Class<V> valueType)

mapJsonCodec

public static <K,V> JsonCodec<Map<K,V>> mapJsonCodec(Class<K> keyType,
                                                                 JsonCodec<V> valueType)

getType

public Type getType()

Gets the type this codec supports.

fromJson

public T fromJson(String json)
           throws IllegalArgumentException

Converts the specified json string into an instance of type T.

Parameters:

json - the json string to parse

Returns:

parsed response; never null

Throws:

IllegalArgumentException - if the json string can not be converted to the type T

toJson

public String toJson(T instance)
              throws IllegalArgumentException

Converts the specified instance to json.

Parameters:

instance - the instance to convert to json

Returns:

json string

Throws:

IllegalArgumentException - if the specified instance can not be converted to json

toJsonWithLengthLimit

public Optional<String> toJsonWithLengthLimit(T instance,
                                              int lengthLimit)

Converts the specified instance to optional json string with a length limit. Returns Optional.empty() if length limit is exceeded.

Parameters:

instance - the instance to convert to json

lengthLimit - the maximum length of the serialized string in characters

Returns:

json string

Throws:

IllegalArgumentException - if the specified instance can not be converted to json

fromJson

public T fromJson(byte[] json)
           throws IllegalArgumentException

Coverts the specified json bytes (UTF-8) into an instance of type T.

Parameters:

json - the json bytes (UTF-8) to parse

Returns:

parsed response; never null

Throws:

IllegalArgumentException - if the json bytes can not be converted to the type T

toJsonBytes

public byte[] toJsonBytes(T instance)
                   throws IllegalArgumentException

Converts the specified instance to json.

Parameters:

instance - the instance to convert to json

Returns:

json bytes (UTF-8)

Throws:

IllegalArgumentException - if the specified instance can not be converted to json