com.fasterxml.jackson.jr.ob.impl

Class TypeDetector

java.lang.Object

com.fasterxml.jackson.jr.ob.impl.TypeDetector

public class TypeDetector
extends Object

Helper object used for efficient detection of type information relevant to our conversion needs when writing out Java Objects as JSON.

Note that usage pattern is such that a single "root" instance is kept by each JSON instance; and an actual per-operation instance must be constructed by calling perOperationInstance(int): reason for this is that instances use simple caching to handle the common case of repeating types within JSON Arrays.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	_features
protected Map<ClassKey,ValueReader>	_incompleteReaders During resolution, some readers may be in-progress, but need to be linked: for example, with cyclic type references.
protected ClassKey	_key Reusable lookup key; only used by per-thread instances.
protected ConcurrentHashMap<ClassKey,ValueReader>	_knownReaders Set of ValueReaders that we have resolved
protected ConcurrentHashMap<ClassKey,Integer>	_knownSerTypes Mapping from classes to resolved type constants or indexes, to use for serialization.
protected CopyOnWriteArrayList<BeanPropertyWriter[]>	_knownWriters
protected Class<?>	_prevClass
protected int	_prevType
protected Object	_readerLock
protected TypeResolver	_typeResolver For generic containers (Collections, Maps, arrays), we may need this guy.
protected static int	CACHE_FLAGS
protected static int	MAX_CACHED_READERS While we should be able to cache all types in the active working set, we should also avoid potential unbounded retention, since there is generally just one big `TypeDetector` instances per JVM (or at least ClassLoader).
protected BeanPropertyWriter[]	NO_PROPS_FOR_WRITE
static int	SER_BOOLEAN
static int	SER_BOOLEAN_ARRAY
static int	SER_BYTE_ARRAY
static int	SER_CALENDAR
static int	SER_CHAR
static int	SER_CHAR_ARRAY
static int	SER_CHARACTER_SEQUENCE
static int	SER_CLASS
static int	SER_COLLECTION All kinds of Collections other than Lists
static int	SER_DATE
static int	SER_ENUM
static int	SER_FILE
static int	SER_INT_ARRAY
static int	SER_ITERABLE Anything that implements Iterable, but not Collection.
static int	SER_LIST All kinds of Lists.
static int	SER_LONG_ARRAY
static int	SER_MAP All kinds of Maps.
static int	SER_NUMBER_BIG_DECIMAL
static int	SER_NUMBER_BIG_INTEGER
static int	SER_NUMBER_BYTE
static int	SER_NUMBER_DOUBLE
static int	SER_NUMBER_FLOAT
static int	SER_NUMBER_INTEGER
static int	SER_NUMBER_LONG
static int	SER_NUMBER_SHORT
static int	SER_OBJECT_ARRAY Arrays of non-primitive types
static int	SER_STRING
static int	SER_TREE_NODE An implementation of TreeNode
static int	SER_UNKNOWN Type not yet resolved
static int	SER_URI
static int	SER_URL
static int	SER_UUID

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TypeDetector(int features) Constructor for the blueprint instance
protected	TypeDetector(TypeDetector base, int features)

Method Summary

Methods

Modifier and Type	Method and Description
protected int	_findPOJOSerializationType(Class<?> raw)
protected int	_findSimple(Class<?> raw, boolean forSer)
protected BeanReader	_resolveBeanForDeser(Class<?> raw)
static TypeDetector	blueprint(int features)
protected ValueReader	collectionReader(Class<?> collectionType, ResolvedType valueType)
protected ValueReader	collectionReader(Class<?> contextType, Type collectionType)
protected ValueReader	createReader(Class<?> contextType, Class<?> type, Type genericType)
ValueReader	enumReader(Class<?> enumType)
ValueReader	findReader(Class<?> raw) Method used during deserialization to find handler for given non-generic type.
int	findSerializationType(Class<?> raw) The main lookup method used to find type identifier for given raw class; including Bean types (if allowed).
BeanPropertyWriter[]	getPropertyWriters(int index)
protected ValueReader	mapReader(Class<?> mapType, ResolvedType valueType)
protected ValueReader	mapReader(Class<?> contextType, Type mapType)
TypeDetector	perOperationInstance(int features)
protected BeanPropertyWriter[]	resolveBeanForSer(Class<?> raw, POJODefinition classDef)
protected POJODefinition	resolvePOJODefinition(Class<?> raw)

Methods inherited from class java.lang.Object

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

Field Detail

NO_PROPS_FOR_WRITE

protected final BeanPropertyWriter[] NO_PROPS_FOR_WRITE

MAX_CACHED_READERS

protected static final int MAX_CACHED_READERS

While we should be able to cache all types in the active working set, we should also avoid potential unbounded retention, since there is generally just one big `TypeDetector` instances per JVM (or at least ClassLoader).

See Also:

Constant Field Values

SER_UNKNOWN

public static final int SER_UNKNOWN

Type not yet resolved

See Also:

Constant Field Values

SER_MAP

public static final int SER_MAP

All kinds of Maps.

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Constant Field Values

SER_LIST

public static final int SER_LIST

All kinds of Lists.

See Also:

Constant Field Values

SER_COLLECTION

public static final int SER_COLLECTION

All kinds of Collections other than Lists

See Also:

Constant Field Values

SER_OBJECT_ARRAY

public static final int SER_OBJECT_ARRAY

Arrays of non-primitive types

See Also:

Constant Field Values

SER_INT_ARRAY

public static final int SER_INT_ARRAY

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Constant Field Values

SER_LONG_ARRAY

public static final int SER_LONG_ARRAY

See Also:

Constant Field Values

SER_BOOLEAN_ARRAY

public static final int SER_BOOLEAN_ARRAY

See Also:

Constant Field Values

SER_TREE_NODE

public static final int SER_TREE_NODE

An implementation of TreeNode

See Also:

Constant Field Values

SER_STRING

public static final int SER_STRING

See Also:

Constant Field Values

SER_CHARACTER_SEQUENCE

public static final int SER_CHARACTER_SEQUENCE

See Also:

Constant Field Values

SER_CHAR_ARRAY

public static final int SER_CHAR_ARRAY

See Also:

Constant Field Values

SER_BYTE_ARRAY

public static final int SER_BYTE_ARRAY

See Also:

Constant Field Values

SER_NUMBER_BYTE

public static final int SER_NUMBER_BYTE

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Constant Field Values

SER_NUMBER_SHORT

public static final int SER_NUMBER_SHORT

See Also:

Constant Field Values

SER_NUMBER_INTEGER

public static final int SER_NUMBER_INTEGER

See Also:

Constant Field Values

SER_NUMBER_LONG

public static final int SER_NUMBER_LONG

See Also:

Constant Field Values

SER_NUMBER_FLOAT

public static final int SER_NUMBER_FLOAT

See Also:

Constant Field Values

SER_NUMBER_DOUBLE

public static final int SER_NUMBER_DOUBLE

See Also:

Constant Field Values

SER_NUMBER_BIG_INTEGER

public static final int SER_NUMBER_BIG_INTEGER

See Also:

Constant Field Values

SER_NUMBER_BIG_DECIMAL

public static final int SER_NUMBER_BIG_DECIMAL

See Also:

Constant Field Values

SER_BOOLEAN

public static final int SER_BOOLEAN

See Also:

Constant Field Values

SER_CHAR

public static final int SER_CHAR

See Also:

Constant Field Values

SER_ENUM

public static final int SER_ENUM

See Also:

Constant Field Values

SER_DATE

public static final int SER_DATE

See Also:

Constant Field Values

SER_CALENDAR

public static final int SER_CALENDAR

See Also:

Constant Field Values

SER_CLASS

public static final int SER_CLASS

See Also:

Constant Field Values

SER_FILE

public static final int SER_FILE

See Also:

Constant Field Values

SER_UUID

public static final int SER_UUID

See Also:

Constant Field Values

SER_URL

public static final int SER_URL

See Also:

Constant Field Values

SER_URI

public static final int SER_URI

See Also:

Constant Field Values

SER_ITERABLE

public static final int SER_ITERABLE

Anything that implements Iterable, but not Collection.

See Also:

Constant Field Values

CACHE_FLAGS

protected static final int CACHE_FLAGS

_knownSerTypes

protected final ConcurrentHashMap<ClassKey,Integer> _knownSerTypes

Mapping from classes to resolved type constants or indexes, to use for serialization.

_knownWriters

protected final CopyOnWriteArrayList<BeanPropertyWriter[]> _knownWriters

_typeResolver

protected final TypeResolver _typeResolver

For generic containers (Collections, Maps, arrays), we may need this guy.

_knownReaders

protected final ConcurrentHashMap<ClassKey,ValueReader> _knownReaders

Set of ValueReaders that we have resolved

_incompleteReaders

protected Map<ClassKey,ValueReader> _incompleteReaders

During resolution, some readers may be in-progress, but need to be linked: for example, with cyclic type references.

_readerLock

protected final Object _readerLock

_key

protected ClassKey _key

Reusable lookup key; only used by per-thread instances.

_prevClass

protected Class<?> _prevClass

_prevType

protected int _prevType

_features

protected int _features

Constructor Detail

TypeDetector

protected TypeDetector(int features)

Constructor for the blueprint instance

TypeDetector

protected TypeDetector(TypeDetector base,
            int features)

Method Detail

blueprint

public static final TypeDetector blueprint(int features)

perOperationInstance

public TypeDetector perOperationInstance(int features)

resolvePOJODefinition

protected POJODefinition resolvePOJODefinition(Class<?> raw)

_findSimple

protected int _findSimple(Class<?> raw,
              boolean forSer)

getPropertyWriters

public BeanPropertyWriter[] getPropertyWriters(int index)

findSerializationType

public final int findSerializationType(Class<?> raw)

The main lookup method used to find type identifier for given raw class; including Bean types (if allowed).

_findPOJOSerializationType

protected int _findPOJOSerializationType(Class<?> raw)

resolveBeanForSer

protected BeanPropertyWriter[] resolveBeanForSer(Class<?> raw,
                                     POJODefinition classDef)

enumReader

public ValueReader enumReader(Class<?> enumType)

collectionReader

protected ValueReader collectionReader(Class<?> contextType,
                           Type collectionType)

collectionReader

protected ValueReader collectionReader(Class<?> collectionType,
                           ResolvedType valueType)

mapReader

protected ValueReader mapReader(Class<?> contextType,
                    Type mapType)

mapReader

protected ValueReader mapReader(Class<?> mapType,
                    ResolvedType valueType)

findReader

public ValueReader findReader(Class<?> raw)

Method used during deserialization to find handler for given non-generic type.

createReader

protected ValueReader createReader(Class<?> contextType,
                       Class<?> type,
                       Type genericType)

_resolveBeanForDeser

protected BeanReader _resolveBeanForDeser(Class<?> raw)