com.fasterxml.jackson.databind.node
Class ArrayNode

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

All Implemented Interfaces:

TreeNode, JsonSerializable, Iterable<JsonNode>

public class ArrayNode
extends ContainerNode<ArrayNode>

Node class that represents Arrays mapped from Json content.

Nested Class Summary

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

ContainerNode.NoNodesIterator, ContainerNode.NoStringsIterator

Field Summary

protected List<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

	ArrayNode(JsonNodeFactory nc)
protected	ArrayNode(JsonNodeFactory nc, List<JsonNode> children)

Method Summary

protected List<JsonNode>	_createList() Internal factory method for creating Map used for storing child nodes.
protected List<JsonNode>	_createList(int defaultSize) Internal factory method for creating Map used for storing child nodes.
protected ArrayNode	_defaultDeepCopy() Default implementation for 'deepCopy()': can be delegated to by sub-classes if necessary; but usually isn't.
JsonNode	_set(int index, JsonNode value)
ArrayNode	add(BigDecimal v) Method for adding specified number at the end of this array.
ArrayNode	add(boolean v) Method for adding specified boolean value at the end of this array.
ArrayNode	add(Boolean value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	add(byte[] v) Method for adding specified binary value at the end of this array (note: when serializing as JSON, will be output Base64 encoded)
ArrayNode	add(double v) Method for adding specified number at the end of this array.
ArrayNode	add(Double value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	add(float v) Method for adding specified number at the end of this array.
ArrayNode	add(Float value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	add(int v) Method for adding specified number at the end of this array.
ArrayNode	add(Integer value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	add(JsonNode value) Method for adding specified node at the end of this array.
ArrayNode	add(long v) Method for adding specified number at the end of this array.
ArrayNode	add(Long value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	add(String v) Method for adding specified String value at the end of this array.
ArrayNode	addAll(ArrayNode other) Method for adding all child nodes of given Array, appending to child nodes this array contains
ArrayNode	addAll(Collection<JsonNode> nodes) Method for adding given nodes as child nodes of this array node.
ArrayNode	addArray() Method that will construct an ArrayNode and add it as a field of this ObjectNode, replacing old value, if any.
protected void	addContentsTo(List<JsonNode> dst)
ArrayNode	addNull() Method that will add a null value at the end of this array node.
ObjectNode	addObject() Method that will construct an ObjectNode and add it at the end of this array node.
ArrayNode	addPOJO(Object value) Method that will construct a POJONode and add it at the end of this array node.
JsonToken	asToken() Method that can be used for efficient type detection when using stream abstraction for traversing nodes.
ArrayNode	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.
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()
ArrayNode	insert(int index, BigDecimal v) Method that will insert specified numeric value at specified position in this array.
ArrayNode	insert(int index, boolean v) Method that will insert specified String at specified position in this array.
ArrayNode	insert(int index, Boolean value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	insert(int index, byte[] v) Method that will insert specified binary value at specified position in this array (note: when written as JSON, will be Base64 encoded)
ArrayNode	insert(int index, double v) Method that will insert specified numeric value at specified position in this array.
ArrayNode	insert(int index, Double value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	insert(int index, float v) Method that will insert specified numeric value at specified position in this array.
ArrayNode	insert(int index, Float value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	insert(int index, int v) Method that will insert specified numeric value at specified position in this array.
ArrayNode	insert(int index, Integer value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	insert(int index, JsonNode value) Method for inserting specified child node as an element of this Array.
ArrayNode	insert(int index, long v) Method that will insert specified numeric value at specified position in this array.
ArrayNode	insert(int index, Long value) Alternative method that we need to avoid bumping into NPE issues with auto-unboxing.
ArrayNode	insert(int index, String v) Method that will insert specified String at specified position in this array.
ArrayNode	insertArray(int index) Method for creating an array node, inserting it at the specified point in the array, and returning the newly created array (note: NOT 'this' array)
ArrayNode	insertNull(int index) Method that will insert a null value at specified position in this array.
ObjectNode	insertObject(int index) Method for creating an ObjectNode, appending it at the end of this array, and returning the newly created node (note: NOT 'this' array)
ArrayNode	insertPOJO(int index, Object value) Method that will construct a POJONode and insert it at specified position in this array.
boolean	isArray()
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.
JsonNode	remove(int index) Method for removing an entry from this ArrayNode.
ArrayNode	removeAll() Method for removing all elements of this array, leaving the array empty.
void	serialize(JsonGenerator jg, SerializerProvider provider) Method called to serialize node instances using given 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(int index, JsonNode value) Method that will set specified field, replacing old value, if any.
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.

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, fieldNames, fields, findParents, findValues, findValuesAsText, has, has, hasNonNull, hasNonNull, intValue, isBigDecimal, isBigInteger, isBinary, isBoolean, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNull, isNumber, isObject, isPojo, isTextual, isValueNode, iterator, longValue, numberValue, textValue, with, withArray

Methods inherited from class java.lang.Object

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

Field Detail

_children

protected List<JsonNode> _children

Constructor Detail

ArrayNode

public ArrayNode(JsonNodeFactory nc)

ArrayNode

protected ArrayNode(JsonNodeFactory nc,
                    List<JsonNode> children)

Method Detail

deepCopy

public ArrayNode 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 ArrayNode _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<ArrayNode>

isArray

public boolean isArray()

Overrides:

isArray in class JsonNode

Returns:

True if this node represents JSON Array

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<ArrayNode>

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<ArrayNode>

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<ArrayNode>

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 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

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

serialize

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

Description copied from class: BaseJsonNode

Method called to serialize node instances using given 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

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<ArrayNode>

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<ArrayNode>

findValuesAsText

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

Specified by:

findValuesAsText in class ContainerNode<ArrayNode>

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<ArrayNode>

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<ArrayNode>

set

public JsonNode set(int index,
                    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(int) instead)

Returns:

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

add

public ArrayNode add(JsonNode value)

Method for adding specified node at the end of this array.

Returns:

This node, to allow chaining

addAll

public ArrayNode addAll(ArrayNode other)

Method for adding all child nodes of given Array, appending to child nodes this array contains

Parameters:

other - Array to add contents from

Returns:

This node (to allow chaining)

addAll

public ArrayNode addAll(Collection<JsonNode> nodes)

Method for adding given nodes as child nodes of this array node.

Parameters:

nodes - Nodes to add

Returns:

This node (to allow chaining)

insert

public ArrayNode insert(int index,
                        JsonNode value)

Method for inserting specified child node as an element of this Array. If index is 0 or less, it will be inserted as the first element; if >= size(), appended at the end, and otherwise inserted before existing element in specified index. No exceptions are thrown for any index.

Returns:

This node (to allow chaining)

remove

public JsonNode remove(int index)

Method for removing an entry from this ArrayNode. Will return value of the entry at specified index, if entry existed; null if not.

Returns:

Node removed, if any; null if none

removeAll

public ArrayNode removeAll()

Method for removing all elements of this array, leaving the array empty.

Specified by:

removeAll in class ContainerNode<ArrayNode>

Returns:

This node (to allow chaining)

addArray

public ArrayNode addArray()

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

Returns:

Newly constructed ArrayNode

addObject

public ObjectNode addObject()

Method that will construct an ObjectNode and add it at the end of this array node.

Returns:

Newly constructed ObjectNode

addPOJO

public ArrayNode addPOJO(Object value)

Method that will construct a POJONode and add it at the end of this array node.

Returns:

This array node, to allow chaining

addNull

public ArrayNode addNull()

Method that will add a null value at the end of this array node.

Returns:

This array node, to allow chaining

add

public ArrayNode add(int v)

Method for adding specified number at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(Integer value)

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

Returns:

This array node, to allow chaining

add

public ArrayNode add(long v)

Method for adding specified number at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(Long value)

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

Returns:

This array node, to allow chaining

add

public ArrayNode add(float v)

Method for adding specified number at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(Float value)

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

Returns:

This array node, to allow chaining

add

public ArrayNode add(double v)

Method for adding specified number at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(Double value)

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

Returns:

This array node, to allow chaining

add

public ArrayNode add(BigDecimal v)

Method for adding specified number at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(String v)

Method for adding specified String value at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(boolean v)

Method for adding specified boolean value at the end of this array.

Returns:

This array node, to allow chaining

add

public ArrayNode add(Boolean value)

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

Returns:

This array node, to allow chaining

add

public ArrayNode add(byte[] v)

Method for adding specified binary value at the end of this array (note: when serializing as JSON, will be output Base64 encoded)

Returns:

This array node, to allow chaining

insertArray

public ArrayNode insertArray(int index)

Method for creating an array node, inserting it at the specified point in the array, and returning the newly created array (note: NOT 'this' array)

insertObject

public ObjectNode insertObject(int index)

Method for creating an ObjectNode, appending it at the end of this array, and returning the newly created node (note: NOT 'this' array)

Returns:

Newly constructed ObjectNode

insertPOJO

public ArrayNode insertPOJO(int index,
                            Object value)

Method that will construct a POJONode and insert it at specified position in this array.

Returns:

This array node, to allow chaining

insertNull

public ArrayNode insertNull(int index)

Method that will insert a null value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        int v)

Method that will insert specified numeric value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        Integer value)

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

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        long v)

Method that will insert specified numeric value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        Long value)

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

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        float v)

Method that will insert specified numeric value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        Float value)

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

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        double v)

Method that will insert specified numeric value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        Double value)

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

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        BigDecimal v)

Method that will insert specified numeric value at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        String v)

Method that will insert specified String at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        boolean v)

Method that will insert specified String at specified position in this array.

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        Boolean value)

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

Returns:

This array node, to allow chaining

insert

public ArrayNode insert(int index,
                        byte[] v)

Method that will insert specified binary value at specified position in this array (note: when written as JSON, will be Base64 encoded)

Returns:

This array node, to allow chaining

addContentsTo

protected void addContentsTo(List<JsonNode> dst)

_createList

protected List<JsonNode> _createList()

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

_createList

protected List<JsonNode> _createList(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

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

_set

public JsonNode _set(int index,
                     JsonNode value)