Package org.apache.druid.java.util.common.jackson

Class JacksonUtils

java.lang.Object

org.apache.druid.java.util.common.jackson.JacksonUtils

public final class JacksonUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static com.fasterxml.jackson.core.type.TypeReference<Map<String,Boolean>>	TYPE_REFERENCE_MAP_STRING_BOOLEAN
static com.fasterxml.jackson.core.type.TypeReference<Map<String,Object>>	TYPE_REFERENCE_MAP_STRING_OBJECT
static com.fasterxml.jackson.core.type.TypeReference<Map<String,String>>	TYPE_REFERENCE_MAP_STRING_STRING

Method Summary

Modifier and Type	Method	Description
static com.fasterxml.jackson.databind.JsonSerializer<Object>	getSerializer(com.fasterxml.jackson.databind.SerializerProvider serializerProvider, Class<?> clazz)	Returns a serializer for a particular class.
static <T> T	readValue(com.fasterxml.jackson.databind.ObjectMapper mapper, byte[] bytes, com.fasterxml.jackson.core.type.TypeReference<T> valueType)	Silences Jackson's IOException.
static <T> T	readValue(com.fasterxml.jackson.databind.ObjectMapper mapper, byte[] bytes, com.fasterxml.jackson.databind.JavaType valueType)	Silences Jackson's IOException.
static <T> T	readValue(com.fasterxml.jackson.databind.ObjectMapper mapper, byte[] bytes, Class<T> valueType)	Silences Jackson's IOException.
static byte[]	toBytes(com.fasterxml.jackson.databind.ObjectMapper jsonMapper, Object obj)	Convert the given object to an array of bytes.
static void	writeObjectUsingSerializerProvider(com.fasterxml.jackson.core.JsonGenerator jsonGenerator, com.fasterxml.jackson.databind.SerializerProvider serializers, Object o)	Serializes an object using a JsonGenerator.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_REFERENCE_MAP_STRING_OBJECT

public static final com.fasterxml.jackson.core.type.TypeReference<Map<String,Object>> TYPE_REFERENCE_MAP_STRING_OBJECT

TYPE_REFERENCE_MAP_STRING_STRING

public static final com.fasterxml.jackson.core.type.TypeReference<Map<String,String>> TYPE_REFERENCE_MAP_STRING_STRING

TYPE_REFERENCE_MAP_STRING_BOOLEAN

public static final com.fasterxml.jackson.core.type.TypeReference<Map<String,Boolean>> TYPE_REFERENCE_MAP_STRING_BOOLEAN

Method Detail

readValue

public static <T> T readValue(com.fasterxml.jackson.databind.ObjectMapper mapper,
                              byte[] bytes,
                              Class<T> valueType)

Silences Jackson's IOException.

readValue

public static <T> T readValue(com.fasterxml.jackson.databind.ObjectMapper mapper,
                              byte[] bytes,
                              com.fasterxml.jackson.databind.JavaType valueType)

Silences Jackson's IOException.

readValue

public static <T> T readValue(com.fasterxml.jackson.databind.ObjectMapper mapper,
                              byte[] bytes,
                              com.fasterxml.jackson.core.type.TypeReference<T> valueType)

Silences Jackson's IOException.

getSerializer

public static com.fasterxml.jackson.databind.JsonSerializer<Object> getSerializer(com.fasterxml.jackson.databind.SerializerProvider serializerProvider,
                                                                                  Class<?> clazz)
                                                                           throws com.fasterxml.jackson.databind.JsonMappingException

Returns a serializer for a particular class. If you have a SerializerProvider, this is better than calling JsonGenerator.writeObject(Object) or ObjectMapper.writeValue(JsonGenerator, Object), because it avoids re-creating the SerializerProvider for each serialized object.

Throws:

com.fasterxml.jackson.databind.JsonMappingException

writeObjectUsingSerializerProvider

public static void writeObjectUsingSerializerProvider(com.fasterxml.jackson.core.JsonGenerator jsonGenerator,
                                                      com.fasterxml.jackson.databind.SerializerProvider serializers,
                                                      @Nullable
                                                      Object o)
                                               throws IOException

Serializes an object using a JsonGenerator. If you have a SerializerProvider, this is better than calling JsonGenerator.writeObject(Object), because it avoids re-creating the SerializerProvider for each serialized object.

Throws:

IOException

toBytes

public static byte[] toBytes(com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
                             Object obj)

Convert the given object to an array of bytes. Use when the object is known serializable so that the Jackson exception can be suppressed.