Package com.fasterxml.jackson.core

Main public API classes of the core streaming JSON processor: most importantly JsonFactory used for constructing JSON parser (JsonParser) and generator (JsonGenerator) instances.

Public API of the higher-level mapping interfaces ("Mapping API") is found from the "jackson-databind" bundle, except for following base interfaces that are defined here:

• TreeNode is included within Streaming API to support integration of the Tree Model (which is based on JsonNode) with the basic parsers and generators (iff using mapping-supporting factory: which is part of Mapping API, not core)
• ObjectCodec is included so that reference to the object capable of serializing/deserializing Objects to/from JSON (usually, com.fasterxml.jackson.databind.ObjectMapper) can be exposed, without adding direct dependency to implementation.

Interface Summary

Interface	Description
FormatFeature	Marker interface that is to be implemented by data format - specific features.
FormatSchema	Simple tag interface used to mark schema objects that are used by some JsonParser and JsonGenerator implementations to further specify structure of expected format.
JsonTokenId	Interface defined to contain ids accessible with JsonToken.id().
PrettyPrinter	Interface for objects that implement pretty printer functionality, such as indentation.
SerializableString	Interface that defines how Jackson package can interact with efficient pre-serialized or lazily-serialized and reused String representations.
TreeNode	Marker interface used to denote JSON Tree nodes, as far as the core package knows them (which is very little): mostly needed to allow ObjectCodec to have some level of interoperability.
Versioned	Interface that those Jackson components that are explicitly versioned will implement.

Class Summary

Class	Description
Base64Variant	Class used to define specific details of which variant of Base64 encoding/decoding is to be used.
Base64Variants	Container for commonly used Base64 variants: Base64Variants.MIME Base64Variants.MIME_NO_LINEFEEDS Base64Variants.PEM Base64Variants.MODIFIED_FOR_URL See entries for full description of differences.
JsonFactory	The main factory class of Jackson package, used to configure and construct reader (aka parser, JsonParser) and writer (aka generator, JsonGenerator) instances.
JsonFactoryBuilder	TSFBuilder implementation for constructing vanilla JsonFactory instances for reading/writing JSON encoded content.
JsonGenerator	Base class that defines public API for writing JSON content.
JsonLocation	Object that encapsulates Location information used for reporting parsing (or potentially generation) errors, as well as current location within input streams.
JsonParser	Base class that defines public API for reading JSON content.
JsonpCharacterEscapes	Convenience CharacterEscapes implementation that escapes Unicode characters `0x2028` and `0x2029` (in addition to characters escaped otherwise), which are apparently considered linefeeds as per newer Javascript specifications, and consequently problematic when using JSONP (see https://en.wikipedia.org/wiki/JSONP).
JsonPointer	Implementation of JSON Pointer specification.
JsonStreamContext	Shared base class for streaming processing contexts used during reading and writing of Json content using Streaming API.
ObjectCodec	Abstract class that defines the interface that JsonParser and JsonGenerator use to serialize and deserialize regular Java objects (POJOs aka Beans).
TokenStreamFactory	Intermediate base class for actual format-specific factories for constructing parsers (reading) and generators (writing).
TreeCodec	Interface that defines objects that can read and write TreeNode instances using Streaming API.
TSFBuilder<F extends JsonFactory,B extends TSFBuilder<F,B>>	Since 2.10, Builder class is offered for creating token stream factories with difference configurations: with 3.x they will be fully immutable.
Version	Object that encapsulates versioning information of a component.

Enum Summary

Enum	Description
Base64Variant.PaddingReadBehaviour	Defines how the Base64Variant deals with Padding while reading
JsonEncoding	Enumeration that defines legal encodings that can be used for JSON content, based on list of allowed encodings from JSON specification.
JsonFactory.Feature	Enumeration that defines all on/off features that can only be changed for JsonFactory.
JsonGenerator.Feature	Enumeration that defines all togglable features for generators.
JsonParser.Feature	Enumeration that defines all on/off features for parsers.
JsonParser.NumberType	Enumeration of possible "native" (optimal) types that can be used for numbers.
JsonToken	Enumeration for basic token types used for returning results of parsing JSON content.
StreamReadCapability	Set of on/off capabilities that a JsonParser for given format (or in case of buffering, original format) has.
StreamReadFeature	Token reader (parser) features not-specific to any particular format backend.
StreamWriteCapability	Set of on/off capabilities that a JsonGenerator for given format (or in case of buffering, original format) has.
StreamWriteFeature	Token writer (generator) features not-specific to any particular format backend.

Exception Summary

Exception	Description
JacksonException	Base class for all Jackson-produced checked exceptions.
JsonGenerationException	Exception type for exceptions during JSON writing, such as trying to output content in wrong context (non-matching end-array or end-object, for example).
JsonParseException	Exception type for parsing problems, used when non-well-formed content (content that does not conform to JSON syntax as per specification) is encountered.
JsonProcessingException	Intermediate base class for all problems encountered when processing (parsing, generating) JSON content that are not pure I/O problems.