Uses of Package
com.fasterxml.jackson.core.util

Packages that use com.fasterxml.jackson.core.util

Package	Description
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.
com.fasterxml.jackson.core.base	Base classes used by concrete Parser and Generator implementations; contain functionality that is not specific to JSON or input abstraction (byte vs char).
com.fasterxml.jackson.core.exc	Package for some of JsonProcessingException subtypes contained by streaming API.
com.fasterxml.jackson.core.filter
com.fasterxml.jackson.core.io
com.fasterxml.jackson.core.json	JSON-specific parser and generator implementation classes that Jackson defines and uses.
com.fasterxml.jackson.core.json.async	Non-blocking ("async") JSON parser implementation.
com.fasterxml.jackson.core.sym	Internal implementation classes for efficient handling of of symbols in JSON (field names in Objects)
com.fasterxml.jackson.core.util	Utility classes used by Jackson Core functionality.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core

Class and Description
BufferRecycler This is a small utility class, whose main functionality is to allow simple reuse of raw byte/char buffers.
ByteArrayBuilder Helper class that is similar to ByteArrayOutputStream in usage, but more geared to Jackson use cases internally.
JacksonFeature Basic API implemented by Enums used for simple Jackson "features": on/off settings and capabilities exposed as something that can be internally represented as bit sets.
JacksonFeatureSet Container similar to EnumSet meant for storing sets of JacksonFeatures (usually Enums): main difference being that these sets are immutable.
JsonGeneratorDecorator Simple interface to allow adding decorators around JsonGenerators.
RecyclerPool API for object pools that control creation and possible reuse of objects that are costly to create (often things like encoding/decoding buffers).
RequestPayload Container object used to contain optional information on content being parsed, passed to JsonParseException in case of exception being thrown; this may be useful for caller to display information on failure.
Separators Value class used with some PrettyPrinter implements

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.base

Class and Description
ByteArrayBuilder Helper class that is similar to ByteArrayOutputStream in usage, but more geared to Jackson use cases internally.
JacksonFeatureSet Container similar to EnumSet meant for storing sets of JacksonFeatures (usually Enums): main difference being that these sets are immutable.
TextBuffer TextBuffer is a class similar to StringBuffer, with following differences: TextBuffer uses segments character arrays, to avoid having to do additional array copies when array is not big enough.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.exc

Class and Description
RequestPayload Container object used to contain optional information on content being parsed, passed to JsonParseException in case of exception being thrown; this may be useful for caller to display information on failure.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.filter

Class and Description
JsonGeneratorDelegate
JsonParserDelegate Helper class that implements delegation pattern for JsonParser, to allow for simple overridability of basic parsing functionality.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.io

Class and Description
BufferRecycler This is a small utility class, whose main functionality is to allow simple reuse of raw byte/char buffers.
TextBuffer TextBuffer is a class similar to StringBuffer, with following differences: TextBuffer uses segments character arrays, to avoid having to do additional array copies when array is not big enough.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.json

Class and Description
JacksonFeature Basic API implemented by Enums used for simple Jackson "features": on/off settings and capabilities exposed as something that can be internally represented as bit sets.
JacksonFeatureSet Container similar to EnumSet meant for storing sets of JacksonFeatures (usually Enums): main difference being that these sets are immutable.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.json.async

Class and Description
JacksonFeatureSet Container similar to EnumSet meant for storing sets of JacksonFeatures (usually Enums): main difference being that these sets are immutable.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.sym

Class and Description
InternCache Singleton class that adds a simple first-level cache in front of regular String.intern() functionality.

Classes in com.fasterxml.jackson.core.util used by com.fasterxml.jackson.core.util

Class and Description
BufferRecycler This is a small utility class, whose main functionality is to allow simple reuse of raw byte/char buffers.
ByteArrayBuilder Helper class that is similar to ByteArrayOutputStream in usage, but more geared to Jackson use cases internally.
DefaultIndenter Default linefeed-based indenter, used by DefaultPrettyPrinter (unless overridden).
DefaultPrettyPrinter Default PrettyPrinter implementation that uses 2-space indentation with platform-default linefeeds.
DefaultPrettyPrinter.FixedSpaceIndenter This is a very simple indenter that only adds a single space for indentation.
DefaultPrettyPrinter.Indenter Interface that defines objects that can produce indentation used to separate object entries and array values.
DefaultPrettyPrinter.NopIndenter Dummy implementation that adds no indentation whatsoever
Instantiatable Add-on interface used to indicate things that may be "blueprint" objects which can not be used as is, but are used for creating usable per-process (serialization, deserialization) instances, using Instantiatable.createInstance() method.
InternCache Singleton class that adds a simple first-level cache in front of regular String.intern() functionality.
JacksonFeature Basic API implemented by Enums used for simple Jackson "features": on/off settings and capabilities exposed as something that can be internally represented as bit sets.
JacksonFeatureSet Container similar to EnumSet meant for storing sets of JacksonFeatures (usually Enums): main difference being that these sets are immutable.
JsonParserDelegate Helper class that implements delegation pattern for JsonParser, to allow for simple overridability of basic parsing functionality.
JsonParserSequence Helper class that can be used to sequence multiple physical JsonParsers to create a single logical sequence of tokens, as a single JsonParser.
JsonRecyclerPools.BoundedPool RecyclerPool implementation that uses a bounded queue (ArrayBlockingQueue for recycling instances.
JsonRecyclerPools.ConcurrentDequePool RecyclerPool implementation that uses ConcurrentLinkedDeque for recycling instances.
JsonRecyclerPools.LockFreePool RecyclerPool implementation that uses a lock free linked list for recycling instances.
JsonRecyclerPools.NonRecyclingPool Dummy RecyclerPool implementation that does not recycle anything but simply creates new instances when asked to acquire items.
JsonRecyclerPools.ThreadLocalPool ThreadLocal-based RecyclerPool implementation used for recycling BufferRecycler instances: see RecyclerPool.ThreadLocalPoolBase for full explanation of functioning.
MinimalPrettyPrinter PrettyPrinter implementation that adds no indentation, just implements everything necessary for value output to work as expected, and provide simpler extension points to allow for creating simple custom implementations that add specific decoration or overrides.
RecyclerPool API for object pools that control creation and possible reuse of objects that are costly to create (often things like encoding/decoding buffers).
RecyclerPool.BoundedPoolBase RecyclerPool implementation that uses a bounded queue (ArrayBlockingQueue for recycling instances.
RecyclerPool.ConcurrentDequePoolBase RecyclerPool implementation that uses ConcurrentLinkedDeque for recycling instances.
RecyclerPool.LockFreePoolBase RecyclerPool implementation that uses a lock free linked list for recycling instances.
RecyclerPool.NonRecyclingPoolBase RecyclerPool implementation that does not use any pool but simply creates new instances when necessary.
RecyclerPool.StatefulImplBase Intermediate base class for instances that are stateful and require special handling with respect to JDK serialization, to retain "global" reference distinct from non-shared ones.
RecyclerPool.ThreadLocalPoolBase Default RecyclerPool implementation that uses ThreadLocal for recycling instances.
RecyclerPool.WithPool Simple add-on interface that poolable entities must implement.
Separators Value class used with some PrettyPrinter implements
Separators.Spacing Define the spacing around elements like commas and colons.
TextBuffer TextBuffer is a class similar to StringBuffer, with following differences: TextBuffer uses segments character arrays, to avoid having to do additional array copies when array is not big enough.