org.codehaus.jackson.node
Class ObjectNode

java.lang.Object
  org.codehaus.jackson.JsonNode
      org.codehaus.jackson.node.BaseJsonNode
          org.codehaus.jackson.node.ContainerNode
              org.codehaus.jackson.node.ObjectNode

All Implemented Interfaces:

Iterable<JsonNode>, JsonSerializable, JsonSerializableWithType

public class ObjectNode
extends ContainerNode

Note 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 org.codehaus.jackson.node.ContainerNode

ContainerNode.NoNodesIterator, ContainerNode.NoStringsIterator

Constructor Summary

ObjectNode(JsonNodeFactory nc)

Method Summary

JsonToken	asToken() Method that can be used for efficient type detection when using stream abstraction for traversing nodes.
boolean	equals(Object o) Note: marked as abstract to ensure all implementation classes define it properly.
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.
Iterator<JsonNode>	getElements() Method for accessing all value nodes of this Node, iff this node is a Json Array or Object node.
Iterator<String>	getFieldNames() Method for accessing names of all fields for this Node, iff this node is a Json Object node.
Iterator<Map.Entry<String,JsonNode>>	getFields() Method to use for accessing all fields (with both names and values) of this Json Object.
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.
void	put(String fieldName, BigDecimal v) Method for setting value of a field to specified numeric value.
void	put(String fieldName, boolean v) Method for setting value of a field to specified String value.
void	put(String fieldName, byte[] v) Method for setting value of a field to specified binary value
void	put(String fieldName, double v) Method for setting value of a field to specified numeric value.
void	put(String fieldName, float v) Method for setting value of a field to specified numeric value.
void	put(String fieldName, int v) Method for setting value of a field to specified numeric value.
JsonNode	put(String fieldName, JsonNode value) Method that will set specified field, replacing old value, if any.
void	put(String fieldName, long v) Method for setting value of a field to specified numeric value.
void	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.
void	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.
void	putPOJO(String fieldName, Object pojo)
JsonNode	remove(String fieldName) Method for removing field entry from this ObjectNode.
ObjectNode	removeAll() Method for removing all children container has (if any)
void	serialize(JsonGenerator jg, SerializerProvider provider) Method that can be called to serialize this node and all of its descendants using specified JSON generator.
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 org.codehaus.jackson.node.ContainerNode

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

Methods inherited from class org.codehaus.jackson.node.BaseJsonNode

getNumberType, serializeWithType, traverse, writeTo

Methods inherited from class org.codehaus.jackson.JsonNode

getBigIntegerValue, getBinaryValue, getBooleanValue, getDecimalValue, getDoubleValue, getElementValue, getFieldValue, getIntValue, getLongValue, getNumberValue, getPath, getPath, getTextValue, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNull, isNumber, isPojo, isTextual, isValueNode, iterator

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectNode

public ObjectNode(JsonNodeFactory nc)

Method Detail

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 class ContainerNode

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

Returns:

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

getElements

public Iterator<JsonNode> getElements()

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:

getElements 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.

Specified by:

get in class ContainerNode

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.

Specified by:

get in class ContainerNode

Returns:

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

getFieldNames

public Iterator<String> getFieldNames()

Description copied from class: JsonNode

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

Overrides:

getFieldNames 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

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

getFields

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

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

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)

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.

removeAll

public ObjectNode removeAll()

Description copied from class: ContainerNode

Method for removing all children container has (if any)

Specified by:

removeAll in class ContainerNode

Returns:

Container node itself (to allow method call chaining)

putAll

public JsonNode putAll(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 (to allow chaining)

Since:

1.3

putAll

public JsonNode putAll(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 (to allow chaining)

Since:

1.3

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.

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.

Returns:

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

putPOJO

public void putPOJO(String fieldName,
                    Object pojo)

putNull

public void putNull(String fieldName)

put

public void put(String fieldName,
                int v)

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

put

public void put(String fieldName,
                long v)

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

put

public void put(String fieldName,
                float v)

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

put

public void put(String fieldName,
                double v)

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

put

public void put(String fieldName,
                BigDecimal v)

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

put

public void put(String fieldName,
                String v)

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

put

public void put(String fieldName,
                boolean v)

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

put

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

Method for setting value of a field to specified binary value

equals

public boolean equals(Object o)

Description copied from class: JsonNode

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

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