Constructor Detail

• JsonNode

  protected JsonNode()

Method Detail

• deepCopy

  public abstract <T extends JsonNode> T deepCopy()

  Method that can be called to get a node that is guaranteed not to allow changing of this node through mutators on this node or any of its children. This means it can either make a copy of this node (and all mutable children and grand children nodes), or node itself if it is immutable.

  Note: return type is guaranteed to have same type as the node method is called on; which is why method is declared with local generic type.

  Returns:

  Node that is either a copy of this node (and all non-leaf children); or, for immutable leaf nodes, node itself.

  Since:

  2.0

• size

  public int size()

  Specified by:

  size in interface com.fasterxml.jackson.core.TreeNode

• isEmpty

  public boolean isEmpty()

  Convenience method that is functionally same as:

      size() == 0
  

  for all node types.

  Since:

  2.10

• isValueNode

  public final boolean isValueNode()

  Specified by:

  isValueNode in interface com.fasterxml.jackson.core.TreeNode

• isContainerNode

  public final boolean isContainerNode()

  Specified by:

  isContainerNode in interface com.fasterxml.jackson.core.TreeNode

• isMissingNode

  public boolean isMissingNode()

  Specified by:

  isMissingNode in interface com.fasterxml.jackson.core.TreeNode

• isArray

  public boolean isArray()

  Specified by:

  isArray in interface com.fasterxml.jackson.core.TreeNode

• isObject

  public boolean isObject()

  Specified by:

  isObject in interface com.fasterxml.jackson.core.TreeNode

• get

  public abstract JsonNode get(int index)

  Method for accessing value of the specified element of an array node. For other nodes, null is always returned.

  For array nodes, index specifies exact location within array and allows for efficient iteration over child elements (underlying storage is guaranteed to be efficiently indexable, i.e. has random-access to elements). If index is less than 0, or equal-or-greater than node.size(), null is returned; no exception is thrown for any index.

  NOTE: if the element value has been explicitly set as null (which is different from removal!), a NullNode will be returned, not null.

  Specified by:

  get in interface com.fasterxml.jackson.core.TreeNode

  Returns:

  Node that represent value of the specified element, if this node is an array and has specified element. Null otherwise.

• get

  public JsonNode get(String fieldName)

  Method for accessing value of the specified field of an object node. If this node is not an object (or it does not have a value for specified field name), or if there is no field with such name, null is returned.

  NOTE: if the property value has been explicitly set as null (which is different from removal!), a NullNode will be returned, not null.

  Specified by:

  get in interface com.fasterxml.jackson.core.TreeNode

  Returns:

  Node that represent value of the specified field, if this node is an object and has value for the specified field. Null otherwise.

• path

  public abstract JsonNode path(String fieldName)

  This method is similar to get(String), except that instead of returning null if no such value exists (due to this node not being an object, or object not having value for the specified field), a "missing node" (node that returns true for isMissingNode()) will be returned. This allows for convenient and safe chained access via path calls.

  Specified by:

  path in interface com.fasterxml.jackson.core.TreeNode

• path

  public abstract JsonNode path(int index)

  This method is similar to get(int), except that instead of returning null if no such element exists (due to index being out of range, or this node not being an array), a "missing node" (node that returns true for isMissingNode()) will be returned. This allows for convenient and safe chained access via path calls.

  Specified by:

  path in interface com.fasterxml.jackson.core.TreeNode

• fieldNames

  public Iterator<String> fieldNames()

  Specified by:

  fieldNames in interface com.fasterxml.jackson.core.TreeNode

• at

  public final JsonNode at(com.fasterxml.jackson.core.JsonPointer ptr)

  Method for locating node specified by given JSON pointer instances. Method will never return null; if no matching node exists, will return a node for which isMissingNode() returns true.

  Specified by:

  at in interface com.fasterxml.jackson.core.TreeNode

  Returns:

  Node that matches given JSON Pointer: if no match exists, will return a node for which isMissingNode() returns true.

  Since:

  2.3

• at

  public final JsonNode at(String jsonPtrExpr)

  Convenience method that is functionally equivalent to:

     return at(JsonPointer.valueOf(jsonPointerExpression));
  

  Note that if the same expression is used often, it is preferable to construct JsonPointer instance once and reuse it: this method will not perform any caching of compiled expressions.

  Specified by:

  at in interface com.fasterxml.jackson.core.TreeNode

  Parameters:

  jsonPtrExpr - Expression to compile as a JsonPointer instance

  Returns:

  Node that matches given JSON Pointer: if no match exists, will return a node for which TreeNode.isMissingNode() returns true.

  Since:

  2.3

• _at

  protected abstract JsonNode _at(com.fasterxml.jackson.core.JsonPointer ptr)

  Helper method used by other methods for traversing the next step of given path expression, and returning matching value node if any: if no match, null is returned.

  Parameters:

  ptr - Path expression to use

  Returns:

  Either matching JsonNode for the first step of path or null if no match (including case that this node is not a container)

• getNodeType

  public abstract JsonNodeType getNodeType()

  Return the type of this node

  Returns:

  the node type as a JsonNodeType enum value

  Since:

  2.2

• isPojo

  public final boolean isPojo()

  Method that can be used to check if the node is a wrapper for a POJO ("Plain Old Java Object" aka "bean". Returns true only for instances of POJONode.

  Returns:

  True if this node wraps a POJO

• isNumber

  public final boolean isNumber()

  Returns:

  True if this node represents a numeric JSON value

• isIntegralNumber

  public boolean isIntegralNumber()

  Returns:

  True if this node represents an integral (integer) numeric JSON value

• isFloatingPointNumber

  public boolean isFloatingPointNumber()

  Returns:

  True if this node represents a non-integral numeric JSON value

• isShort

  public boolean isShort()

  Method that can be used to check whether contained value is a number represented as Java short. Note, however, that even if this method returns false, it is possible that conversion would be possible from other numeric types -- to check if this is possible, use canConvertToInt() instead.

  Returns:

  True if the value contained by this node is stored as Java short

• isInt

  public boolean isInt()

  Method that can be used to check whether contained value is a number represented as Java int. Note, however, that even if this method returns false, it is possible that conversion would be possible from other numeric types -- to check if this is possible, use canConvertToInt() instead.

  Returns:

  True if the value contained by this node is stored as Java int

• isLong

  public boolean isLong()

  Method that can be used to check whether contained value is a number represented as Java long. Note, however, that even if this method returns false, it is possible that conversion would be possible from other numeric types -- to check if this is possible, use canConvertToLong() instead.

  Returns:

  True if the value contained by this node is stored as Java long

• isFloat

  public boolean isFloat()

  Since:

  2.2

• isDouble

  public boolean isDouble()

• isBigDecimal

  public boolean isBigDecimal()

• isBigInteger

  public boolean isBigInteger()

• isTextual

  public final boolean isTextual()

  Method that checks whether this node represents basic JSON String value.

• isBoolean

  public final boolean isBoolean()

  Method that can be used to check if this node was created from JSON boolean value (literals "true" and "false").

• isNull

  public final boolean isNull()

  Method that can be used to check if this node was created from JSON literal null value.

• isBinary

  public final boolean isBinary()

  Method that can be used to check if this node represents binary data (Base64 encoded). Although this will be externally written as JSON String value, isTextual() will return false if this method returns true.

  Returns:

  True if this node represents base64 encoded binary data

• canConvertToInt

  public boolean canConvertToInt()

  Method that can be used to check whether this node is a numeric node (isNumber() would return true) AND its value fits within Java's 32-bit signed integer type, int. Note that floating-point numbers are convertible if the integral part fits without overflow (as per standard Java coercion rules)

  NOTE: this method does not consider possible value type conversion from JSON String into Number; so even if this method returns false, it is possible that asInt() could still succeed if node is a JSON String representing integral number, or boolean.

  Since:

  2.0

• canConvertToLong

  public boolean canConvertToLong()

  Method that can be used to check whether this node is a numeric node (isNumber() would return true) AND its value fits within Java's 64-bit signed integer type, long. Note that floating-point numbers are convertible if the integral part fits without overflow (as per standard Java coercion rules)

  NOTE: this method does not consider possible value type conversion from JSON String into Number; so even if this method returns false, it is possible that asLong() could still succeed if node is a JSON String representing integral number, or boolean.

  Since:

  2.0

• canConvertToExactIntegral

  public boolean canConvertToExactIntegral()

  Method that can be used to check whether contained value is numeric (returns true for isNumber()) and can be losslessly converted to integral number (specifically, BigInteger but potentially others, see canConvertToInt() and canConvertToInt()). Latter part allows floating-point numbers (for which isFloatingPointNumber() returns true) that do not have fractional part. Note that "not-a-number" values of double and float will return false as they can not be converted to matching integral representations.

  Returns:

  True if the value is an actual number with no fractional part; false for non-numeric types, NaN representations of floating-point numbers, and floating-point numbers with fractional part.

  Since:

  2.12

• textValue

  public String textValue()

  Method to use for accessing String values. Does NOT do any conversions for non-String value nodes; for non-String values (ones for which isTextual() returns false) null will be returned. For String values, null is never returned (but empty Strings may be)

  Returns:

  Textual value this node contains, iff it is a textual JSON node (comes from JSON String value entry)

• binaryValue

  public byte[] binaryValue()
                     throws IOException

  Method to use for accessing binary content of binary nodes (nodes for which isBinary() returns true); or for Text Nodes (ones for which textValue() returns non-null value), to read decoded base64 data. For other types of nodes, returns null.

  Returns:

  Binary data this node contains, iff it is a binary node; null otherwise

  Throws:

  IOException

• booleanValue

  public boolean booleanValue()

  Method to use for accessing JSON boolean values (value literals 'true' and 'false'). For other types, always returns false.

  Returns:

  Textual value this node contains, iff it is a textual json node (comes from JSON String value entry)

• numberValue

  public Number numberValue()

  Returns numeric value for this node, if and only if this node is numeric (isNumber() returns true); otherwise returns null

  Returns:

  Number value this node contains, if any (null for non-number nodes).

• shortValue

  public short shortValue()

  Returns 16-bit short value for this node, if and only if this node is numeric (isNumber() returns true). For other types returns 0. For floating-point numbers, value is truncated using default Java coercion, similar to how cast from double to short operates.

  Returns:

  Short value this node contains, if any; 0 for non-number nodes.

• intValue

  public int intValue()

  Returns integer value for this node, if and only if this node is numeric (isNumber() returns true). For other types returns 0. For floating-point numbers, value is truncated using default Java coercion, similar to how cast from double to int operates.

  Returns:

  Integer value this node contains, if any; 0 for non-number nodes.

• longValue

  public long longValue()

  Returns 64-bit long value for this node, if and only if this node is numeric (isNumber() returns true). For other types returns 0. For floating-point numbers, value is truncated using default Java coercion, similar to how cast from double to long operates.

  Returns:

  Long value this node contains, if any; 0 for non-number nodes.

• floatValue

  public float floatValue()

  Returns 32-bit floating value for this node, if and only if this node is numeric (isNumber() returns true). For other types returns 0.0. For integer values, conversion is done using coercion; this means that an overflow is possible for `long` values

  Returns:

  32-bit float value this node contains, if any; 0.0 for non-number nodes.

  Since:

  2.2

• doubleValue

  public double doubleValue()

  Returns 64-bit floating point (double) value for this node, if and only if this node is numeric (isNumber() returns true). For other types returns 0.0. For integer values, conversion is done using coercion; this may result in overflows with BigInteger values.

  Returns:

  64-bit double value this node contains, if any; 0.0 for non-number nodes.

  Since:

  2.2

• decimalValue

  public BigDecimal decimalValue()

  Returns floating point value for this node (as BigDecimal), if and only if this node is numeric (isNumber() returns true). For other types returns BigDecimal.ZERO.

  Returns:

  BigDecimal value this node contains, if numeric node; BigDecimal.ZERO for non-number nodes.

• bigIntegerValue

  public BigInteger bigIntegerValue()

  Returns integer value for this node (as BigInteger), if and only if this node is numeric (isNumber() returns true). For other types returns BigInteger.ZERO.

  Returns:

  BigInteger value this node contains, if numeric node; BigInteger.ZERO for non-number nodes.

• asText

  public abstract String asText()

  Method that will return a valid String representation of the container value, if the node is a value node (method isValueNode() returns true), otherwise empty String.

• asText

  public String asText(String defaultValue)

  Method similar to asText(), except that it will return defaultValue in cases where null value would be returned; either for missing nodes (trying to access missing property, or element at invalid item for array) or explicit nulls.

  Since:

  2.4

• asInt

  public int asInt()

  Method that will try to convert value of this node to a Java int. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to an int (including structured types like Objects and Arrays), default value of 0 will be returned; no exceptions are thrown.

• asInt

  public int asInt(int defaultValue)

  Method that will try to convert value of this node to a Java int. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to an int (including structured types like Objects and Arrays), specified defaultValue will be returned; no exceptions are thrown.

• asLong

  public long asLong()

  Method that will try to convert value of this node to a Java long. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to a long (including structured types like Objects and Arrays), default value of 0 will be returned; no exceptions are thrown.

• asLong

  public long asLong(long defaultValue)

  Method that will try to convert value of this node to a Java long. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to a long (including structured types like Objects and Arrays), specified defaultValue will be returned; no exceptions are thrown.

• asDouble

  public double asDouble()

  Method that will try to convert value of this node to a Java double. Numbers are coerced using default Java rules; booleans convert to 0.0 (false) and 1.0 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to an int (including structured types like Objects and Arrays), default value of 0.0 will be returned; no exceptions are thrown.

• asDouble

  public double asDouble(double defaultValue)

  Method that will try to convert value of this node to a Java double. Numbers are coerced using default Java rules; booleans convert to 0.0 (false) and 1.0 (true), and Strings are parsed using default Java language integer parsing rules.

  If representation cannot be converted to an int (including structured types like Objects and Arrays), specified defaultValue will be returned; no exceptions are thrown.

• asBoolean

  public boolean asBoolean()

  Method that will try to convert value of this node to a Java boolean. JSON booleans map naturally; integer numbers other than 0 map to true, and 0 maps to false and Strings 'true' and 'false' map to corresponding values.

  If representation cannot be converted to a boolean value (including structured types like Objects and Arrays), default value of false will be returned; no exceptions are thrown.

• asBoolean

  public boolean asBoolean(boolean defaultValue)

  Method that will try to convert value of this node to a Java boolean. JSON booleans map naturally; integer numbers other than 0 map to true, and 0 maps to false and Strings 'true' and 'false' map to corresponding values.

  If representation cannot be converted to a boolean value (including structured types like Objects and Arrays), specified defaultValue will be returned; no exceptions are thrown.

• require

  public <T extends JsonNode> T require()
                                 throws IllegalArgumentException

  Method that may be called to verify that this node is NOT so-called "missing node": that is, one for which isMissingNode() returns true. If not missing node, this is returned to allow chaining; otherwise IllegalArgumentException is thrown.

  Returns:

  this node to allow chaining

  Throws:

  IllegalArgumentException - if this node is "missing node"

  Since:

  2.10

• requireNonNull

  public <T extends JsonNode> T requireNonNull()
                                        throws IllegalArgumentException

  Method that may be called to verify that this node is neither so-called "missing node" (that is, one for which isMissingNode() returns true) nor "null node" (one for which isNull() returns true). If non-null non-missing node, this is returned to allow chaining; otherwise IllegalArgumentException is thrown.

  Returns:

  this node to allow chaining

  Throws:

  IllegalArgumentException - if this node is either "missing node" or "null node"

  Since:

  2.10

• required

  public JsonNode required(String propertyName)
                    throws IllegalArgumentException

  Method is functionally equivalent to path(fieldName).required() and can be used to check that this node is an ObjectNode (that is, represents JSON Object value) and has value for specified property with key fieldName (but note that value may be explicit JSON null value). If this node is Object Node and has value for specified property, matching value is returned; otherwise IllegalArgumentException is thrown.

  Parameters:

  propertyName - Name of property to access

  Returns:

  Value of the specified property of this Object node

  Throws:

  IllegalArgumentException - if this node is not an Object node or if it does not have value for specified property

  Since:

  2.10

• required

  public JsonNode required(int index)
                    throws IllegalArgumentException

  Method is functionally equivalent to path(index).required() and can be used to check that this node is an ArrayNode (that is, represents JSON Array value) and has value for specified index (but note that value may be explicit JSON null value). If this node is Array Node and has value for specified index, value at index is returned; otherwise IllegalArgumentException is thrown.

  Parameters:

  index - Index of the value of this Array node to access

  Returns:

  Value at specified index of this Array node

  Throws:

  IllegalArgumentException - if this node is not an Array node or if it does not have value for specified index

  Since:

  2.10

• requiredAt

  public JsonNode requiredAt(String pathExpr)
                      throws IllegalArgumentException

  Method is functionally equivalent to at(pathExpr).required() and can be used to check that there is an actual value node at specified JsonPointer starting from this node (but note that value may be explicit JSON null value). If such value node exists it is returned; otherwise IllegalArgumentException is thrown.

  Parameters:

  pathExpr - JsonPointer expression (as String) to use for finding value node

  Returns:

  Matching value node for given expression

  Throws:

  IllegalArgumentException - if no value node exists at given JSON Pointer path

  Since:

  2.10

• requiredAt

  public final JsonNode requiredAt(com.fasterxml.jackson.core.JsonPointer path)
                            throws IllegalArgumentException

  Method is functionally equivalent to at(path).required() and can be used to check that there is an actual value node at specified JsonPointer starting from this node (but note that value may be explicit JSON null value). If such value node exists it is returned; otherwise IllegalArgumentException is thrown.

  Parameters:

  path - JsonPointer expression to use for finding value node

  Returns:

  Matching value node for given expression

  Throws:

  IllegalArgumentException - if no value node exists at given JSON Pointer path

  Since:

  2.10

• has

  public boolean has(String fieldName)

  Method that allows checking whether this node is JSON Object node and contains value for specified property. If this is the case (including properties with explicit null values), returns true; otherwise returns false.

  This method is equivalent to:

     node.get(fieldName) != null
  

  (since return value of get() is node, not value node contains)

  NOTE: when explicit null values are added, this method will return true for such properties.

  Parameters:

  fieldName - Name of element to check

  Returns:

  True if this node is a JSON Object node, and has a property entry with specified name (with any value, including null value)

• has

  public boolean has(int index)

  Method that allows checking whether this node is JSON Array node and contains a value for specified index If this is the case (including case of specified indexing having null as value), returns true; otherwise returns false.

  Note: array element indexes are 0-based.

  This method is equivalent to:

     node.get(index) != null
  

  NOTE: this method will return true for explicitly added null values.

  Parameters:

  index - Index to check

  Returns:

  True if this node is a JSON Object node, and has a property entry with specified name (with any value, including null value)

• hasNonNull

  public boolean hasNonNull(String fieldName)

  Method that is similar to has(String), but that will return false for explicitly added nulls.

  This method is functionally equivalent to:

     node.get(fieldName) != null && !node.get(fieldName).isNull()
  

  Since:

  2.1

• hasNonNull

  public boolean hasNonNull(int index)

  Method that is similar to has(int), but that will return false for explicitly added nulls.

  This method is equivalent to:

     node.get(index) != null && !node.get(index).isNull()
  

  Since:

  2.1

• iterator

  public final Iterator<JsonNode> iterator()

  Same as calling elements(); implemented so that convenience "for-each" loop can be used for looping over elements of JSON Array constructs.

  Specified by:

  iterator in interface Iterable<JsonNode>

• elements

  public Iterator<JsonNode> elements()

  Method for accessing all value nodes of this Node, iff this node is a JSON Array or Object node. In case of Object node, field names (keys) are not included, only values. For other types of nodes, returns empty iterator.

• fields

  public Iterator<Map.Entry<String,JsonNode>> fields()

  Returns:

  Iterator that can be used to traverse all key/value pairs for object nodes; empty iterator (no contents) for other types

• findValue

  public abstract JsonNode findValue(String fieldName)

  Method for finding a JSON Object field with specified name in this node or its child nodes, and returning value it has. If no matching field is found in this node or its descendants, returns null.

  Parameters:

  fieldName - Name of field to look for

  Returns:

  Value of first matching node found, if any; null if none

• findValues

  public final List<JsonNode> findValues(String fieldName)

  Method for finding JSON Object fields with specified name, and returning found ones as a List. Note that sub-tree search ends if a field is found, so possible children of result nodes are not included. If no matching fields are found in this node or its descendants, returns an empty List.

  Parameters:

  fieldName - Name of field to look for

• findValuesAsText

  public final List<String> findValuesAsText(String fieldName)

  Similar to findValues(java.lang.String), but will additionally convert values into Strings, calling asText().

• findPath

  public abstract JsonNode findPath(String fieldName)

  Method similar to findValue(java.lang.String), but that will return a "missing node" instead of null if no field is found. Missing node is a specific kind of node for which isMissingNode() returns true; and all value access methods return empty or missing value.

  Parameters:

  fieldName - Name of field to look for

  Returns:

  Value of first matching node found; or if not found, a "missing node" (non-null instance that has no value)

• findParent

  public abstract JsonNode findParent(String fieldName)

  Method for finding a JSON Object that contains specified field, within this node or its descendants. If no matching field is found in this node or its descendants, returns null.

  Parameters:

  fieldName - Name of field to look for

  Returns:

  Value of first matching node found, if any; null if none

• findParents

  public final List<JsonNode> findParents(String fieldName)

  Method for finding a JSON Object that contains specified field, within this node or its descendants. If no matching field is found in this node or its descendants, returns null.

  Parameters:

  fieldName - Name of field to look for

  Returns:

  Value of first matching node found, if any; null if none

• findValues

  public abstract List<JsonNode> findValues(String fieldName,
                                            List<JsonNode> foundSoFar)

• findValuesAsText

  public abstract List<String> findValuesAsText(String fieldName,
                                                List<String> foundSoFar)

• findParents

  public abstract List<JsonNode> findParents(String fieldName,
                                             List<JsonNode> foundSoFar)

• withObject

  public final ObjectNode withObject(String expr)

  Short-cut equivalent to:

     withObject(JsonPointer.compile(expr);
  

  see withObject(JsonPointer) for full explanation.

  Parameters:

  expr - JsonPointer expression to use

  Returns:

  ObjectNode found or created

  Since:

  2.14

• withObject

  public final ObjectNode withObject(String expr,
                                     JsonNode.OverwriteMode overwriteMode,
                                     boolean preferIndex)

  Short-cut equivalent to:

    withObject(JsonPointer.compile(expr), overwriteMode, preferIndex);
  

  Since:

  2.14

• withObject

  public final ObjectNode withObject(com.fasterxml.jackson.core.JsonPointer ptr)

  Same as withObject(JsonPointer, OverwriteMode, boolean) but with defaults of OvewriteMode#NULLS (overwrite mode) and true for preferIndex (that is, will try to consider JsonPointer segments index if at all possible and only secondarily as property name

  Parameters:

  ptr - JsonPointer that indicates path to use for Object value to return (potentially creating as necessary)

  Returns:

  ObjectNode found or created

  Since:

  2.14

• withObject

  public ObjectNode withObject(com.fasterxml.jackson.core.JsonPointer ptr,
                               JsonNode.OverwriteMode overwriteMode,
                               boolean preferIndex)

  Method that can be called on Object or Array nodes, to access a Object-valued node pointed to by given JsonPointer, if such a node exists: or if not, an attempt is made to create one and return it. For example, on document

    { "a" : {
         "b" : {
            "c" : 13
         }
      }
    }
  

  calling method with JsonPointer of /a/b would return ObjectNode

    { "c" : 13 }
  

  In cases where path leads to "missing" nodes, a path is created. So, for example, on above document, and JsonPointer of /a/x an empty ObjectNode would be returned and the document would look like:

    { "a" : {
         "b" : {
            "c" : 13
         },
         "x" : { }
      }
    }
  

  Finally, if the path is incompatible with the document -- there is an existing JsonNode through which expression cannot go -- a replacement is attempted if (and only if) conversion is allowed as per overwriteMode passed in. For example, with above document and expression of /a/b/c, conversion is allowed if passing OverwriteMode.SCALARS or OvewriteMode.ALL, and resulting document would look like:

    { "a" : {
         "b" : {
            "c" : { }
         },
         "x" : { }
      }
    }
  

  but if different modes (NONE or NULLS) is passed, an exception is thrown instead.

  Parameters:

  ptr - Pointer that indicates path to use for ObjectNode value to return (potentially creating one as necessary)

  overwriteMode - Defines which node types may be converted in case of incompatible JsonPointer expression: if conversion not allowed, UnsupportedOperationException is thrown.

  preferIndex - When creating a path (for empty or replacement), and path contains segment that may be an array index (simple integer number like 3), whether to construct an ArrayNode (true) or ObjectNode (false). In latter case matching property with quoted number (like "3") is used within Object.

  Returns:

  ObjectNode found or created

  Throws:

  UnsupportedOperationException - if a conversion would be needed for given JsonPointer, document, but was not allowed for the type encountered

  Since:

  2.14

• with

  @Deprecated
  public <T extends JsonNode> T with(String exprOrProperty)

  Deprecated. Since 2.14 use withObject(String) instead
  Method that works in one of possible ways, depending on whether exprOrProperty is a valid JsonPointer expression or not (valid expression is either empty String "" or starts with leading slash / character). If it is, works as a short-cut to:

    withObject(JsonPointer.compile(exprOrProperty));
  

  If it is NOT a valid JsonPointer expression, value is taken as a literal Object property name and traversed like a single-segment JsonPointer.

  NOTE: before Jackson 2.14 behavior was always that of non-expression usage; that is, exprOrProperty was always considered as a simple property name.

• withArray

  public <T extends JsonNode> T withArray(String exprOrProperty)

  Method that works in one of possible ways, depending on whether exprOrProperty is a valid JsonPointer expression or not (valid expression is either empty String "" or starts with leading slash / character). If it is, works as a short-cut to:

    withObject(JsonPointer.compile(exprOrProperty));
  

  If it is NOT a valid JsonPointer expression, value is taken as a literal Object property name and traversed like a single-segment JsonPointer.

  NOTE: before Jackson 2.14 behavior was always that of non-expression usage; that is, exprOrProperty was always considered as a simple property name.

  Parameters:

  exprOrProperty - Either JsonPointer expression for full access (if valid pointer expression), or the name of property for the ArrayNode.

  Returns:

  ArrayNode found or created

• withArray

  public ArrayNode withArray(String expr,
                             JsonNode.OverwriteMode overwriteMode,
                             boolean preferIndex)

  Short-cut equivalent to:

    withArray(JsonPointer.compile(expr), overwriteMode, preferIndex);
  

  Since:

  2.14

• withArray

  public final ArrayNode withArray(com.fasterxml.jackson.core.JsonPointer ptr)

  Same as withArray(JsonPointer, OverwriteMode, boolean) but with defaults of OvewriteMode#NULLS (overwrite mode) and true for preferIndex.

  Parameters:

  ptr - Pointer that indicates path to use for ArrayNode to return (potentially creating as necessary)

  Returns:

  ArrayNode found or created

  Since:

  2.14

• withArray

  public ArrayNode withArray(com.fasterxml.jackson.core.JsonPointer ptr,
                             JsonNode.OverwriteMode overwriteMode,
                             boolean preferIndex)

  Method that can be called on Object or Array nodes, to access a Array-valued node pointed to by given JsonPointer, if such a node exists: or if not, an attempt is made to create one and return it. For example, on document

    { "a" : {
         "b" : [ 1, 2 ]
      }
    }
  

  calling method with JsonPointer of /a/b would return Array

    [ 1, 2 ]
  

  In cases where path leads to "missing" nodes, a path is created. So, for example, on above document, and JsonPointer of /a/x an empty ArrayNode would be returned and the document would look like:

    { "a" : {
         "b" : [ 1, 2 ],
         "x" : [ ]
      }
    }
  

  Finally, if the path is incompatible with the document -- there is an existing JsonNode through which expression cannot go -- a replacement is attempted if (and only if) conversion is allowed as per overwriteMode passed in. For example, with above document and expression of /a/b/0, conversion is allowed if passing OverwriteMode.SCALARS or OvewriteMode.ALL, and resulting document would look like:

    { "a" : {
         "b" : [ [ ], 2 ],
         "x" : [ ]
      }
    }
  

  but if different modes (NONE or NULLS) is passed, an exception is thrown instead.

  Parameters:

  ptr - Pointer that indicates path to use for ArrayNode value to return (potentially creating it as necessary)

  overwriteMode - Defines which node types may be converted in case of incompatible JsonPointer expression: if conversion not allowed, an exception is thrown.

  preferIndex - When creating a path (for empty or replacement), and path contains segment that may be an array index (simple integer number like 3), whether to construct an ArrayNode (true) or ObjectNode (false). In latter case matching property with quoted number (like "3") is used within Object.

  Returns:

  ArrayNode found or created

  Throws:

  UnsupportedOperationException - if a conversion would be needed for given JsonPointer, document, but was not allowed for the type encountered

  Since:

  2.14

• equals

  public boolean equals(Comparator<JsonNode> comparator,
                        JsonNode other)

  Entry method for invoking customizable comparison, using passed-in Comparator object. Nodes will handle traversal of structured types (arrays, objects), but defer to comparator for scalar value comparisons. If a "natural" Comparator is passed -- one that simply calls equals() on one of arguments, passing the other -- implementation is the same as directly calling equals() on node.

  Default implementation simply delegates to passed in comparator, with this as the first argument, and other as the second argument.

  Parameters:

  comparator - Object called to compare two scalar JsonNode instances, and return either 0 (are equals) or non-zero (not equal)

  Since:

  2.6

• toString

  public abstract String toString()

  Method that will produce (as of Jackson 2.10) valid JSON using default settings of databind, as String. If you want other kinds of JSON output (or output formatted using one of other Jackson-supported data formats) make sure to use ObjectMapper or ObjectWriter to serialize an instance, for example:

     String json = objectMapper.writeValueAsString(rootNode);
  

  Note: method defined as abstract to ensure all implementation classes explicitly implement method, instead of relying on Object.toString() definition.

  Overrides:

  toString in class Object

• toPrettyString

  public String toPrettyString()

  Alternative to toString() that will serialize this node using Jackson default pretty-printer.

  Since:

  2.10

• equals

  public abstract boolean equals(Object o)

  Equality for node objects is defined as full (deep) value equality. This means that it is possible to compare complete JSON trees for equality by comparing equality of root nodes.

  Note: marked as abstract to ensure all implementation classes define it properly and not rely on definition from Object.

  Overrides:

  equals in class Object

• _this

  protected <T extends JsonNode> T _this()

• _reportRequiredViolation

  protected <T> T _reportRequiredViolation(String msgTemplate,
                                           Object... args)

  Helper method that throws IllegalArgumentException as a result of violating "required-constraint" for this node (for required(java.lang.String) or related methods).