com.fasterxml.jackson.databind.util

Enum AccessPattern

java.lang.Object

java.lang.Enum<AccessPattern>

com.fasterxml.jackson.databind.util.AccessPattern

All Implemented Interfaces:

Serializable, Comparable<AccessPattern>

public enum AccessPattern
extends Enum<AccessPattern>

Enumeration used to indicate required access pattern for providers: this can sometimes be used to optimize out dynamic calls. The main difference is between constant values (which can be resolved once) and dynamic ones (which must be resolved anew every time).

Enum Constant Summary

Enum Constants

Enum Constant and Description
ALWAYS_NULL Value that indicates that provider never returns anything other than Java `null`.
CONSTANT Value that indicates that provider will always return a constant value, regardless of when it is called; and also that it never uses `context` argument (which may then be passed as `null`)
DYNAMIC Value that indicates that provider may return different values at different times (often a freshly constructed empty container), and thus must be called every time "null replacement" value is needed.

Method Summary

Modifier and Type	Method and Description
static AccessPattern	valueOf(String name) Returns the enum constant of this type with the specified name.
static AccessPattern[]	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

ALWAYS_NULL

public static final AccessPattern ALWAYS_NULL

Value that indicates that provider never returns anything other than Java `null`.

CONSTANT

public static final AccessPattern CONSTANT

Value that indicates that provider will always return a constant value, regardless of when it is called; and also that it never uses `context` argument (which may then be passed as `null`)

DYNAMIC

public static final AccessPattern DYNAMIC

Value that indicates that provider may return different values at different times (often a freshly constructed empty container), and thus must be called every time "null replacement" value is needed.

Method Detail

values

public static AccessPattern[] 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 (AccessPattern c : AccessPattern.values())
    System.out.println(c);

Returns:

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

valueOf

public static AccessPattern 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