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Contains basic mapper (conversion) functionality that allows for converting between regular streaming json content and Java objects (beans or Tree Model: support for both is via ObjectMapper class, as well as convenience methods included in com.fasterxml.jackson.core.JsonParser

Object mapper will convert Json content to ant from basic Java wrapper types (Integer, Boolean, Double), Collection types (List, Map), Java Beans, Strings and nulls.

Tree mapper builds dynamically typed tree of JsonNodes from JSON content (and writes such trees as JSON), similar to how DOM model works with XML. Main benefits over Object mapping are:

  • No null checks are needed (dummy nodes are created as necessary to represent "missing" Object fields and Array elements)
  • No type casts are usually needed: all public access methods are defined in basic JsonNode class, and when "incompatible" method (such as Array element access on, say, Boolean node) is used, returned node is virtual "missing" node.
Because of its dynamic nature, Tree mapping is often convenient for basic path access and tree navigation, where structure of the resulting tree is known in advance.
package com.fasterxml.jackson.databind;
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