com.fasterxml.jackson.core

Enum JsonFactory.Feature

java.lang.Object

java.lang.Enum<JsonFactory.Feature>

com.fasterxml.jackson.core.JsonFactory.Feature

All Implemented Interfaces:

Serializable, Comparable<JsonFactory.Feature>

Enclosing class:

JsonFactory

public static enum JsonFactory.Feature
extends Enum<JsonFactory.Feature>

Enumeration that defines all on/off features that can only be changed for JsonFactory.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CANONICALIZE_FIELD_NAMES Feature that determines whether JSON object field names are to be canonicalized (details of how canonicalization is done then further specified by INTERN_FIELD_NAMES).
FAIL_ON_SYMBOL_HASH_OVERFLOW Feature that determines what happens if we encounter a case in symbol handling where number of hash collisions exceeds a safety threshold -- which almost certainly means a denial-of-service attack via generated duplicate hash codes.
INTERN_FIELD_NAMES Feature that determines whether JSON object field names are to be canonicalized using String.intern() or not: if enabled, all field names will be intern()ed (and caller can count on this being true for all such names); if disabled, no intern()ing is done.
USE_THREAD_LOCAL_FOR_BUFFER_RECYCLING Feature that determines whether we will use BufferRecycler with ThreadLocal and SoftReference, for efficient reuse of underlying input/output buffers.

Method Summary

Methods

Modifier and Type	Method and Description
static int	collectDefaults() Method that calculates bit set (flags) of all features that are enabled by default.
boolean	enabledByDefault()
boolean	enabledIn(int flags)
int	getMask()
static JsonFactory.Feature	valueOf(String name) Returns the enum constant of this type with the specified name.
static JsonFactory.Feature[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INTERN_FIELD_NAMES

public static final JsonFactory.Feature INTERN_FIELD_NAMES

Feature that determines whether JSON object field names are to be canonicalized using String.intern() or not: if enabled, all field names will be intern()ed (and caller can count on this being true for all such names); if disabled, no intern()ing is done. There may still be basic canonicalization (that is, same String will be used to represent all identical object property names for a single document).

Note: this setting only has effect if CANONICALIZE_FIELD_NAMES is true -- otherwise no canonicalization of any sort is done.

This setting is enabled by default.

CANONICALIZE_FIELD_NAMES

public static final JsonFactory.Feature CANONICALIZE_FIELD_NAMES

Feature that determines whether JSON object field names are to be canonicalized (details of how canonicalization is done then further specified by INTERN_FIELD_NAMES).

This setting is enabled by default.

FAIL_ON_SYMBOL_HASH_OVERFLOW

public static final JsonFactory.Feature FAIL_ON_SYMBOL_HASH_OVERFLOW

Feature that determines what happens if we encounter a case in symbol handling where number of hash collisions exceeds a safety threshold -- which almost certainly means a denial-of-service attack via generated duplicate hash codes. If feature is enabled, an IllegalStateException is thrown to indicate the suspected denial-of-service attack; if disabled, processing continues but canonicalization (and thereby intern()ing) is disabled) as protective measure.

This setting is enabled by default.

Since:

2.4

USE_THREAD_LOCAL_FOR_BUFFER_RECYCLING

public static final JsonFactory.Feature USE_THREAD_LOCAL_FOR_BUFFER_RECYCLING

Feature that determines whether we will use BufferRecycler with ThreadLocal and SoftReference, for efficient reuse of underlying input/output buffers. This usually makes sense on normal J2SE/J2EE server-side processing; but may not make sense on platforms where SoftReference handling is broken (like Android), or if there are retention issues due to ThreadLocal (see Issue #189 for a possible case)

This setting is enabled by default.

Since:

2.6

Method Detail

values

public static JsonFactory.Feature[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (JsonFactory.Feature c : JsonFactory.Feature.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static JsonFactory.Feature valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

collectDefaults

public static int collectDefaults()

Method that calculates bit set (flags) of all features that are enabled by default.

enabledByDefault

public boolean enabledByDefault()

enabledIn

public boolean enabledIn(int flags)

getMask

public int getMask()