Package com.fasterxml.jackson.core

Enum JsonFactory.Feature

java.lang.Object
java.lang.Enum<JsonFactory.Feature>
com.fasterxml.jackson.core.JsonFactory.Feature
All Implemented Interfaces:
JacksonFeature, Serializable, Comparable<JsonFactory.Feature>, java.lang.constant.Constable
Enclosing class:
JsonFactory
public static enum JsonFactory.Feature extends Enum<JsonFactory.Feature> implements JacksonFeature
Enumeration that defines all on/off features that can only be changed for JsonFactory.

  • Enum Constant Details

    • 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 a RecyclerPool for allocating and possibly recycling BufferRecycler or not. The default RecyclerPool implementation uses 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 jackson-core#189 for a possible case)

      Note that since 2.16 naming here is somewhat misleading as this is used to now enable or disable pooling; but the actual pooling implementation is configurable and may not be based on ThreadLocal.

      This setting is enabled by default.

      Since:
      2.6

    • CHARSET_DETECTION

      public static final JsonFactory.Feature CHARSET_DETECTION
      Feature to control charset detection for byte-based inputs (byte[], InputStream...). When this feature is enabled (the default), the factory will allow UTF-16 and UTF-32 inputs and try to detect them, as specified by RFC 4627. When this feature is disabled the factory will assume UTF-8, as specified by RFC 8259.

      This setting is enabled by default.

      Since:
      2.15

  • Method Details

    • values

      public static JsonFactory.Feature[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      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.
      Returns:
      Bit field of features enabled by default

    • enabledByDefault

      public boolean enabledByDefault()
      Description copied from interface: JacksonFeature
      Accessor for checking whether this feature is enabled by default.
      Specified by:
      enabledByDefault in interface JacksonFeature
      Returns:
      Whether this instance is enabled by default or not

    • enabledIn

      public boolean enabledIn(int flags)
      Description copied from interface: JacksonFeature
      Convenience method for checking whether feature is enabled in given bitmask.
      Specified by:
      enabledIn in interface JacksonFeature
      Parameters:
      flags - Bit field that contains a set of enabled features of this type
      Returns:
      True if this feature is enabled in passed bit field

    • getMask

      public int getMask()
      Description copied from interface: JacksonFeature
      Returns bit mask for this feature instance; must be a single bit, that is of form 1 << N.
      Specified by:
      getMask in interface JacksonFeature
      Returns:
      Bit mask of this feature