com.fasterxml.jackson.databind.node
Class ObjectNode

java.lang.Object
  com.fasterxml.jackson.databind.JsonNode
      com.fasterxml.jackson.databind.node.BaseJsonNode
          com.fasterxml.jackson.databind.node.ContainerNode<ObjectNode>
              com.fasterxml.jackson.databind.node.ObjectNode

All Implemented Interfaces:

TreeNode, JsonSerializable, Iterable<JsonNode>

public class ObjectNode
extends ContainerNode<ObjectNode>

Node that maps to JSON Object structures in JSON content.

Nested Class Summary

protected static class

ObjectNode.NoFieldsIterator For efficiency, let's share the "no fields" iterator...

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.node.ContainerNode

ContainerNode.NoNodesIterator, ContainerNode.NoStringsIterator

Field Summary

protected Map<String,JsonNode>

_children

Fields inherited from class com.fasterxml.jackson.databind.node.ContainerNode

_nodeFactory

Fields inherited from class com.fasterxml.jackson.databind.JsonNode

NO_NODES, NO_STRINGS

Constructor Summary

	ObjectNode(JsonNodeFactory nc)
protected	ObjectNode(JsonNodeFactory nc, Map<String,JsonNode> children)

Method Summary

protected Map<String,JsonNode>	_createMap() Internal factory method for creating Map used for storing child nodes.
protected Map<String,JsonNode>	_createMap(int defaultSize) Internal factory method for creating Map used for storing child nodes.
protected ObjectNode	_defaultDeepCopy() Default implementation for 'deepCopy()': can be delegated to by sub-classes if necessary; but usually isn't.
JsonToken	asToken() Method that can be used for efficient type detection when using stream abstraction for traversing nodes.
ObjectNode	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.
Iterator<JsonNode>	elements() Method for accessing all value nodes of this Node, iff this node is a JSON Array or Object node.
boolean	equals(Object o) Equality for node objects is defined as full (deep) value equality.
Iterator<String>	fieldNames() Method for accessing names of all fields for this Node, iff this node is a JSON Object node.
Iterator<Map.Entry<String,JsonNode>>	fields() Method to use for accessing all fields (with both names and values) of this JSON Object.
ObjectNode	findParent(String fieldName) Method for finding a JSON Object that contains specified field, within this node or its descendants.
List<JsonNode>	findParents(String fieldName, List<JsonNode> foundSoFar)
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.
List<JsonNode>	findValues(String fieldName, List<JsonNode> foundSoFar)
List<String>	findValuesAsText(String fieldName, List<String> foundSoFar)
JsonNode	get(int index) Method for accessing value of the specified element of an array node.
JsonNode	get(String fieldName) Method for accessing value of the specified field of an object node.
int	hashCode()
boolean	isObject()
JsonNode	path(int index) This method is similar to JsonNode.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 JsonNode.isMissingNode()) will be returned.
JsonNode	path(String fieldName) This method is similar to JsonNode.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 JsonNode.isMissingNode()) will be returned.
ObjectNode	put(String fieldName, BigDecimal v) Method for setting value of a field to specified numeric value.
ObjectNode	put(String fieldName, boolean v) Method for setting value of a field to specified String value.
ObjectNode	put(String fieldName, Boolean value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ObjectNode	put(String fieldName, byte[] v) Method for setting value of a field to specified binary value
ObjectNode	put(String fieldName, double v) Method for setting value of a field to specified numeric value.
ObjectNode	put(String fieldName, Double value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ObjectNode	put(String fieldName, float v) Method for setting value of a field to specified numeric value.
ObjectNode	put(String fieldName, Float value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ObjectNode	put(String fieldName, int v) Method for setting value of a field to specified numeric value.
ObjectNode	put(String fieldName, Integer value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
JsonNode	put(String fieldName, JsonNode value) Method that will set specified field, replacing old value, if any.
ObjectNode	put(String fieldName, long v) Method for setting value of a field to specified numeric value.
ObjectNode	put(String fieldName, Long value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ObjectNode	put(String fieldName, String v) Method for setting value of a field to specified String value.
JsonNode	putAll(Map<String,JsonNode> properties) Method for adding given properties to this object node, overriding any existing values for those properties.
JsonNode	putAll(ObjectNode other) Method for adding all properties of the given Object, overriding any existing values for those properties.
ArrayNode	putArray(String fieldName) Method that will construct an ArrayNode and add it as a field of this ObjectNode, replacing old value, if any.
protected void	putContentsTo(Map<String,JsonNode> dst)
ObjectNode	putNull(String fieldName)
ObjectNode	putObject(String fieldName) Method that will construct an ObjectNode and add it as a field of this ObjectNode, replacing old value, if any.
ObjectNode	putPOJO(String fieldName, Object pojo)
ObjectNode	remove(Collection<String> fieldNames) Method for removing specified field properties out of this ObjectNode.
JsonNode	remove(String fieldName) Method for removing field entry from this ObjectNode.
ObjectNode	removeAll() Method for removing all field properties, such that this ObjectNode will contain no properties after call.
JsonNode	replace(String fieldName, JsonNode value) Method for replacing value of specific property with passed value, and returning value (or null if none).
ObjectNode	retain(Collection<String> fieldNames) Method for removing all field properties out of this ObjectNode except for ones specified in argument.
ObjectNode	retain(String... fieldNames) Method for removing all field properties out of this ObjectNode except for ones specified in argument.
void	serialize(JsonGenerator jg, SerializerProvider provider) Method that can be called to serialize this node and all of its descendants using specified JSON generator.
void	serializeWithType(JsonGenerator jg, SerializerProvider provider, TypeSerializer typeSer) Type information is needed, even if JsonNode instances are "plain" JSON, since they may be mixed with other types.
JsonNode	set(String fieldName, JsonNode value) Method that will set specified field, replacing old value, if any.
JsonNode	setAll(Map<String,JsonNode> properties) Method for adding given properties to this object node, overriding any existing values for those properties.
JsonNode	setAll(ObjectNode other) Method for adding all properties of the given Object, overriding any existing values for those properties.
int	size() Method that returns number of child nodes this node contains: for Array nodes, number of child elements, for Object nodes, number of fields, and for all other nodes 0.
String	toString() Note: marked as abstract to ensure all implementation classes define it properly.
ObjectNode	with(String propertyName) Method that can be called on Object nodes, to access a property that has Object value; or if no such property exists, to create, add and return such Object node.
ArrayNode	withArray(String propertyName) Method that can be called on Object nodes, to access a property that has Array value; or if no such property exists, to create, add and return such Array node.
ObjectNode	without(Collection<String> fieldNames) Method for removing specified field properties out of this ObjectNode.
JsonNode	without(String fieldName) Method for removing field entry from this ObjectNode, and returning instance after removal.

Methods inherited from class com.fasterxml.jackson.databind.node.ContainerNode

arrayNode, asText, binaryNode, binaryNode, booleanNode, isContainerNode, nullNode, numberNode, numberNode, numberNode, numberNode, numberNode, numberNode, numberNode, objectNode, POJONode, textNode

Methods inherited from class com.fasterxml.jackson.databind.node.BaseJsonNode

findPath, numberType, traverse

Methods inherited from class com.fasterxml.jackson.databind.JsonNode

asBoolean, asBoolean, asDouble, asDouble, asInt, asInt, asLong, asLong, bigIntegerValue, binaryValue, booleanValue, canConvertToInt, canConvertToLong, decimalValue, doubleValue, findParents, findValues, findValuesAsText, has, has, hasNonNull, hasNonNull, intValue, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNull, isNumber, isPojo, isTextual, isValueNode, iterator, longValue, numberValue, textValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

_children

protected Map<String,JsonNode> _children

Constructor Detail

ObjectNode

public ObjectNode(JsonNodeFactory nc)

ObjectNode

protected ObjectNode(JsonNodeFactory nc,
                     Map<String,JsonNode> children)

Method Detail

deepCopy

public ObjectNode deepCopy()

Description copied from class: JsonNode

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.

Specified by:

deepCopy in class JsonNode

Returns:

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

_defaultDeepCopy

protected ObjectNode _defaultDeepCopy()

Default implementation for 'deepCopy()': can be delegated to by sub-classes if necessary; but usually isn't.

asToken

public JsonToken asToken()

Description copied from class: BaseJsonNode

Method that can be used for efficient type detection when using stream abstraction for traversing nodes. Will return the first JsonToken that equivalent stream event would produce (for most nodes there is just one token but for structured/container types multiple)

Specified by:

asToken in interface TreeNode

Specified by:

asToken in class ContainerNode<ObjectNode>

isObject

public boolean isObject()

Overrides:

isObject in class JsonNode

Returns:

True if this node represents JSON Object

size

public int size()

Description copied from class: JsonNode

Method that returns number of child nodes this node contains: for Array nodes, number of child elements, for Object nodes, number of fields, and for all other nodes 0.

Specified by:

size in class ContainerNode<ObjectNode>

Returns:

For non-container nodes returns 0; for arrays number of contained elements, and for objects number of fields.

elements

public Iterator<JsonNode> elements()

Description copied from class: JsonNode

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.

Overrides:

elements in class JsonNode

get

public JsonNode get(int index)

Description copied from class: JsonNode

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 class ContainerNode<ObjectNode>

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)

Description copied from class: JsonNode

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 class ContainerNode<ObjectNode>

Returns:

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

fieldNames

public Iterator<String> fieldNames()

Description copied from class: JsonNode

Method for accessing names of all fields for this Node, iff this node is a JSON Object node.

Overrides:

fieldNames in class JsonNode

path

public JsonNode path(int index)

Description copied from class: JsonNode

This method is similar to JsonNode.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 JsonNode.isMissingNode()) will be returned. This allows for convenient and safe chained access via path calls.

Specified by:

path in class JsonNode

path

public JsonNode path(String fieldName)

Description copied from class: JsonNode

This method is similar to JsonNode.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 JsonNode.isMissingNode()) will be returned. This allows for convenient and safe chained access via path calls.

Specified by:

path in class JsonNode

fields

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

Method to use for accessing all fields (with both names and values) of this JSON Object.

Overrides:

fields in class JsonNode

Returns:

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

with

public ObjectNode with(String propertyName)

Description copied from class: JsonNode

Method that can be called on Object nodes, to access a property that has Object value; or if no such property exists, to create, add and return such Object node. If the node method is called on is not Object node, or if property exists and has value that is not Object node, UnsupportedOperationException is thrown

Overrides:

with in class JsonNode

withArray

public ArrayNode withArray(String propertyName)

Description copied from class: JsonNode

Method that can be called on Object nodes, to access a property that has Array value; or if no such property exists, to create, add and return such Array node. If the node method is called on is not Object node, or if property exists and has value that is not Array node, UnsupportedOperationException is thrown

Overrides:

withArray in class JsonNode

findValue

public JsonNode findValue(String fieldName)

Description copied from class: JsonNode

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.

Specified by:

findValue in class ContainerNode<ObjectNode>

Parameters:

fieldName - Name of field to look for

Returns:

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

findValues

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

Specified by:

findValues in class ContainerNode<ObjectNode>

findValuesAsText

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

Specified by:

findValuesAsText in class ContainerNode<ObjectNode>

findParent

public ObjectNode findParent(String fieldName)

Description copied from class: JsonNode

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.

Specified by:

findParent in class ContainerNode<ObjectNode>

Parameters:

fieldName - Name of field to look for

Returns:

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

findParents

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

Specified by:

findParents in class ContainerNode<ObjectNode>

serialize

public final void serialize(JsonGenerator jg,
                            SerializerProvider provider)
                     throws IOException,
                            JsonProcessingException

Method that can be called to serialize this node and all of its descendants using specified JSON generator.

Specified by:

serialize in interface JsonSerializable

Specified by:

serialize in class BaseJsonNode

Throws:

IOException

JsonProcessingException

serializeWithType

public void serializeWithType(JsonGenerator jg,
                              SerializerProvider provider,
                              TypeSerializer typeSer)
                       throws IOException,
                              JsonProcessingException

Description copied from class: BaseJsonNode

Type information is needed, even if JsonNode instances are "plain" JSON, since they may be mixed with other types.

Specified by:

serializeWithType in interface JsonSerializable

Specified by:

serializeWithType in class BaseJsonNode

Throws:

IOException

JsonProcessingException

set

public JsonNode set(String fieldName,
                    JsonNode value)

Method that will set specified field, replacing old value, if any. Note that this is identical to replace(String, JsonNode), except for return value.

NOTE: added to replace those uses of put(String, JsonNode) where chaining with 'this' is desired.

Parameters:

value - to set field to; if null, will be converted to a NullNode first (to remove field entry, call remove(java.lang.String) instead)

Returns:

This node after adding/replacing property value (to allow chaining)

Since:

2.1

setAll

public JsonNode setAll(Map<String,JsonNode> properties)

Method for adding given properties to this object node, overriding any existing values for those properties.

Parameters:

properties - Properties to add

Returns:

This node after adding/replacing property values (to allow chaining)

Since:

2.1

setAll

public JsonNode setAll(ObjectNode other)

Method for adding all properties of the given Object, overriding any existing values for those properties.

Parameters:

other - Object of which properties to add to this object

Returns:

This node after addition (to allow chaining)

Since:

2.1

replace

public JsonNode replace(String fieldName,
                        JsonNode value)

Method for replacing value of specific property with passed value, and returning value (or null if none).

Parameters:

fieldName - Property of which value to replace

value - Value to set property to, replacing old value if any

Returns:

Old value of the property; null if there was no such property with value

Since:

2.1

without

public JsonNode without(String fieldName)

Method for removing field entry from this ObjectNode, and returning instance after removal.

Returns:

This node after removing entry (if any)

Since:

2.1

without

public ObjectNode without(Collection<String> fieldNames)

Method for removing specified field properties out of this ObjectNode.

Parameters:

fieldNames - Names of fields to remove

Returns:

This node after removing entries

Since:

2.1

put

public JsonNode put(String fieldName,
                    JsonNode value)

Method that will set specified field, replacing old value, if any.

Parameters:

value - to set field to; if null, will be converted to a NullNode first (to remove field entry, call remove(java.lang.String) instead)

NOTE: this method will be deprecated in 2.2; and should be replace with either set(String,JsonNode) or replace(String,JsonNode), depending on which return value is desired for possible chaining.

Returns:

Old value of the field, if any; null if there was no old value.

remove

public JsonNode remove(String fieldName)

Method for removing field entry from this ObjectNode. Will return value of the field, if such field existed; null if not.

Returns:

Value of specified field, if it existed; null if not

remove

public ObjectNode remove(Collection<String> fieldNames)

Method for removing specified field properties out of this ObjectNode.

Parameters:

fieldNames - Names of fields to remove

Returns:

This node after removing entries

removeAll

public ObjectNode removeAll()

Method for removing all field properties, such that this ObjectNode will contain no properties after call.

Specified by:

removeAll in class ContainerNode<ObjectNode>

Returns:

This node after removing all entries

putAll

public JsonNode putAll(Map<String,JsonNode> properties)

Method for adding given properties to this object node, overriding any existing values for those properties.

NOTE: this method will be deprecated in 2.2; and should be replace with setAll(Map).

Parameters:

properties - Properties to add

Returns:

This node after adding/replacing property values (to allow chaining)

putAll

public JsonNode putAll(ObjectNode other)

Method for adding all properties of the given Object, overriding any existing values for those properties.

NOTE: this method will be deprecated in 2.2; and should be replace with setAll(ObjectNode).

Parameters:

other - Object of which properties to add to this object

Returns:

This node (to allow chaining)

retain

public ObjectNode retain(Collection<String> fieldNames)

Method for removing all field properties out of this ObjectNode except for ones specified in argument.

Parameters:

fieldNames - Fields to retain in this ObjectNode

Returns:

This node (to allow call chaining)

retain

public ObjectNode retain(String... fieldNames)

Method for removing all field properties out of this ObjectNode except for ones specified in argument.

Parameters:

fieldNames - Fields to retain in this ObjectNode

Returns:

This node (to allow call chaining)

putArray

public ArrayNode putArray(String fieldName)

Method that will construct an ArrayNode and add it as a field of this ObjectNode, replacing old value, if any.

NOTE: Unlike all put(...) methods, return value is NOT this ObjectNode, but the newly created ArrayNode instance.

Returns:

Newly constructed ArrayNode (NOT the old value, which could be of any type)

putObject

public ObjectNode putObject(String fieldName)

Method that will construct an ObjectNode and add it as a field of this ObjectNode, replacing old value, if any.

NOTE: Unlike all put(...) methods, return value is NOT this ObjectNode, but the newly created ObjectNode instance.

Returns:

Newly constructed ObjectNode (NOT the old value, which could be of any type)

putPOJO

public ObjectNode putPOJO(String fieldName,
                          Object pojo)

Returns:

This node (to allow chaining)

putNull

public ObjectNode putNull(String fieldName)

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      int v)

Method for setting value of a field to specified numeric value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      Integer value)

Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      long v)

Method for setting value of a field to specified numeric value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      Long value)

Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      float v)

Method for setting value of a field to specified numeric value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      Float value)

Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      double v)

Method for setting value of a field to specified numeric value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      Double value)

Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      BigDecimal v)

Method for setting value of a field to specified numeric value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      String v)

Method for setting value of a field to specified String value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      boolean v)

Method for setting value of a field to specified String value.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      Boolean value)

Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.

Returns:

This node (to allow chaining)

put

public ObjectNode put(String fieldName,
                      byte[] v)

Method for setting value of a field to specified binary value

Returns:

This node (to allow chaining)

_createMap

protected Map<String,JsonNode> _createMap()

Internal factory method for creating Map used for storing child nodes. Overridable by sub-classes, used when caller does not know what optimal size would, used for example when constructing a Map when adding the first one.

Since:

2.1

_createMap

protected Map<String,JsonNode> _createMap(int defaultSize)

Internal factory method for creating Map used for storing child nodes. Overridable by sub-classes, used when caller has an idea of what optimal size should be: used when copying contents of an existing node.

Since:

2.1

putContentsTo

protected void putContentsTo(Map<String,JsonNode> dst)

equals

public boolean equals(Object o)

Description copied from class: JsonNode

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.

Specified by:

equals in class JsonNode

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Description copied from class: JsonNode

Note: marked as abstract to ensure all implementation classes define it properly.

Specified by:

toString in class JsonNode