com.fasterxml.jackson.databind.node

## Class JsonNodeFactory

- java.lang.Object
- - com.fasterxml.jackson.databind.node.JsonNodeFactory

- All Implemented Interfaces:
    JsonNodeCreator, java.io.Serializable

      public class JsonNodeFactory
      extends java.lang.Object
      implements java.io.Serializable, JsonNodeCreator

  Base class that specifies methods for getting access to Node instances (newly constructed, or shared, depending on type), as well as basic implementation of the methods. Designed to be sub-classed if extended functionality (additions to behavior of node types, mostly) is needed.
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static JsonNodeFactory` | `instance` Default singleton instance that construct "standard" node instances: given that this class is stateless, a globally shared singleton can be used.

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `JsonNodeFactory()` Default constructor
    `` | `JsonNodeFactory(boolean bigDecimalExact)` Main constructor

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected boolean` | `_inIntRange(long l)`
    `ArrayNode` | `arrayNode()` Factory method for constructing an empty JSON Array node
    `ArrayNode` | `arrayNode(int capacity)` Factory method for constructing a JSON Array node with an initial capacity
    `BinaryNode` | `binaryNode(byte[] data)` Factory method for constructing a node that represents given binary data, and will get serialized as equivalent base64-encoded String value
    `BinaryNode` | `binaryNode(byte[] data, int offset, int length)` Factory method for constructing a node that represents given binary data, and will get serialized as equivalent base64-encoded String value
    `BooleanNode` | `booleanNode(boolean v)` Factory method for getting an instance of JSON boolean value (either literal 'true' or 'false')
    `NullNode` | `nullNode()` Factory method for getting an instance of JSON null node (which represents literal null value)
    `NumericNode` | `numberNode(java.math.BigDecimal v)` Factory method for getting an instance of JSON numeric value that expresses given unlimited precision floating point value
    `NumericNode` | `numberNode(java.math.BigInteger v)` Factory method for getting an instance of JSON numeric value that expresses given unlimited range integer value
    `NumericNode` | `numberNode(byte v)` Factory method for getting an instance of JSON numeric value that expresses given 8-bit value
    `ValueNode` | `numberNode(java.lang.Byte value)` Alternate factory method that will handle wrapper value, which may be null.
    `NumericNode` | `numberNode(double v)` Factory method for getting an instance of JSON numeric value that expresses given 64-bit floating point value
    `ValueNode` | `numberNode(java.lang.Double value)` Alternate factory method that will handle wrapper value, which may be null.
    `NumericNode` | `numberNode(float v)` Factory method for getting an instance of JSON numeric value that expresses given 32-bit floating point value
    `ValueNode` | `numberNode(java.lang.Float value)` Alternate factory method that will handle wrapper value, which may be null.
    `NumericNode` | `numberNode(int v)` Factory method for getting an instance of JSON numeric value that expresses given 32-bit integer value
    `ValueNode` | `numberNode(java.lang.Integer value)` Alternate factory method that will handle wrapper value, which may be null.
    `NumericNode` | `numberNode(long v)` Factory method for getting an instance of JSON numeric value that expresses given 64-bit integer value
    `ValueNode` | `numberNode(java.lang.Long value)` Alternate factory method that will handle wrapper value, which may be null.
    `NumericNode` | `numberNode(short v)` Factory method for getting an instance of JSON numeric value that expresses given 16-bit integer value
    `ValueNode` | `numberNode(java.lang.Short value)` Alternate factory method that will handle wrapper value, which may be null.
    `ObjectNode` | `objectNode()` Factory method for constructing an empty JSON Object ("struct") node
    `ValueNode` | `pojoNode(java.lang.Object pojo)` Factory method for constructing a wrapper for POJO ("Plain Old Java Object") objects; these will get serialized using data binding, usually as JSON Objects, but in some cases as JSON Strings or other node types.
    `ValueNode` | `rawValueNode(RawValue value)` Factory method to use for adding "raw values"; pre-encoded values that are included exactly as-is when node is serialized.
    `TextNode` | `textNode(java.lang.String text)` Factory method for constructing a node that represents JSON String value
    `static JsonNodeFactory` | `withExactBigDecimals(boolean bigDecimalExact)` Return a factory instance with the desired behavior for BigDecimals

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### instance

          public static final JsonNodeFactory instance

      Default singleton instance that construct "standard" node instances: given that this class is stateless, a globally shared singleton can be used.

  - ### Constructor Detail

    - #### JsonNodeFactory

          public JsonNodeFactory(boolean bigDecimalExact)

      Main constructor

      The only argument to this constructor is a boolean telling whether `DecimalNode` instances must be built with exact representations of `BigDecimal` instances.

      This has quite an influence since, for instance, a BigDecimal (and, therefore, a DecimalNode) constructed from input string `"1.0"` and another constructed with input string `"1.00"` will not be equal, since their scale differs (1 in the first case, 2 in the second case).

      Note that setting the argument to `true` does not guarantee a strict inequality between JSON representations: input texts `"0.1"` and `"1e-1"`, for instance, yield two equivalent BigDecimal instances since they have the same scale (1).

      The no-arg constructor (and the default `instance`) calls this constructor with `false` as an argument.

      Parameters:
        `bigDecimalExact` - see description
      See Also:
        `BigDecimal`

    - #### JsonNodeFactory

          protected JsonNodeFactory()

      Default constructor

      This calls `JsonNodeFactory(boolean)` with `false` as an argument.

  - ### Method Detail

    - #### withExactBigDecimals

          public static JsonNodeFactory withExactBigDecimals(boolean bigDecimalExact)

      Return a factory instance with the desired behavior for BigDecimals

      See `JsonNodeFactory(boolean)` for a full description.

      Parameters:
        `bigDecimalExact` - see description
      Returns:
        a factory instance

    - #### booleanNode

          public BooleanNode booleanNode(boolean v)

      Factory method for getting an instance of JSON boolean value (either literal 'true' or 'false')
      Specified by:
        `booleanNode` in interface `JsonNodeCreator`

    - #### nullNode

          public NullNode nullNode()

      Factory method for getting an instance of JSON null node (which represents literal null value)
      Specified by:
        `nullNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(byte v)

      Factory method for getting an instance of JSON numeric value that expresses given 8-bit value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Byte value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(short v)

      Factory method for getting an instance of JSON numeric value that expresses given 16-bit integer value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Short value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(int v)

      Factory method for getting an instance of JSON numeric value that expresses given 32-bit integer value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Integer value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(long v)

      Factory method for getting an instance of JSON numeric value that expresses given 64-bit integer value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Long value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(java.math.BigInteger v)

      Factory method for getting an instance of JSON numeric value that expresses given unlimited range integer value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(float v)

      Factory method for getting an instance of JSON numeric value that expresses given 32-bit floating point value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Float value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(double v)

      Factory method for getting an instance of JSON numeric value that expresses given 64-bit floating point value
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public ValueNode numberNode(java.lang.Double value)

      Alternate factory method that will handle wrapper value, which may be null. Due to possibility of null, returning type is not guaranteed to be `NumericNode`, but just `ValueNode`.
      Specified by:
        `numberNode` in interface `JsonNodeCreator`

    - #### numberNode

          public NumericNode numberNode(java.math.BigDecimal v)

      Factory method for getting an instance of JSON numeric value that expresses given unlimited precision floating point value

      In the event that the factory has been built to normalize decimal values, the BigDecimal argument will be stripped off its trailing zeroes, using `BigDecimal.stripTrailingZeros()`.

      Specified by:
        `numberNode` in interface `JsonNodeCreator`
      See Also:
        `JsonNodeFactory(boolean)`

    - #### textNode

          public TextNode textNode(java.lang.String text)

      Factory method for constructing a node that represents JSON String value
      Specified by:
        `textNode` in interface `JsonNodeCreator`

    - #### binaryNode

          public BinaryNode binaryNode(byte[] data)

      Factory method for constructing a node that represents given binary data, and will get serialized as equivalent base64-encoded String value
      Specified by:
        `binaryNode` in interface `JsonNodeCreator`

    - #### binaryNode

          public BinaryNode binaryNode(byte[] data,
                              int offset,
                              int length)

      Factory method for constructing a node that represents given binary data, and will get serialized as equivalent base64-encoded String value
      Specified by:
        `binaryNode` in interface `JsonNodeCreator`

    - #### arrayNode

          public ArrayNode arrayNode()

      Factory method for constructing an empty JSON Array node
      Specified by:
        `arrayNode` in interface `JsonNodeCreator`

    - #### arrayNode

          public ArrayNode arrayNode(int capacity)

      Factory method for constructing a JSON Array node with an initial capacity
      Specified by:
        `arrayNode` in interface `JsonNodeCreator`
      Since:
        2.8

    - #### objectNode

          public ObjectNode objectNode()

      Factory method for constructing an empty JSON Object ("struct") node
      Specified by:
        `objectNode` in interface `JsonNodeCreator`

    - #### pojoNode

          public ValueNode pojoNode(java.lang.Object pojo)

      Factory method for constructing a wrapper for POJO ("Plain Old Java Object") objects; these will get serialized using data binding, usually as JSON Objects, but in some cases as JSON Strings or other node types.
      Specified by:
        `pojoNode` in interface `JsonNodeCreator`

    - #### rawValueNode

          public ValueNode rawValueNode(RawValue value)

      Description copied from interface: `JsonNodeCreator`
      Factory method to use for adding "raw values"; pre-encoded values that are included exactly as-is when node is serialized. This may be used, for example, to include fully serialized JSON sub-trees. Note that the concept may not work with all backends, and since no translation of any kinds is done it will not work when converting between data formats.
      Specified by:
        `rawValueNode` in interface `JsonNodeCreator`

    - #### _inIntRange

          protected boolean _inIntRange(long l)