http://github.com/FasterXML/jackson: General data-binding functionality for Jackson: works on core streaming API (FasterXML)
  • Tatu Saloranta
  • Christopher Currie
  • Paul Brown 
package com.fasterxml.jackson.databind.util;


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).

/**
 * 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).
 */
public enum AccessPattern {
    
Value that indicates that provider never returns anything other than
Java `null`.

/**
     * Value that indicates that provider never returns anything other than
     * Java `null`.
     */
    ALWAYS_NULL,

    
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`)

/**
     * 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`)
     */
    CONSTANT,

    
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.

/**
     * 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.
     */
    DYNAMIC
    ;
}