public class NullNode extends ValueNode
JsonNode.OverwriteModeJsonSerializable.Base| Modifier | Constructor and Description |
|---|---|
protected |
NullNode()
NOTE: visibility raised to `protected` in 2.9.3 to allow custom subtypes.
|
| Modifier and Type | Method and Description |
|---|---|
String |
asText()
Method that will return a valid String representation of
the container value, if the node is a value node
(method
JsonNode.isValueNode() returns true),
otherwise empty String. |
String |
asText(String defaultValue)
Returns the text value of this node or the provided
defaultValue if this node
does not have a text value. |
com.fasterxml.jackson.core.JsonToken |
asToken()
Method that can be used for efficient type detection
when using stream abstraction for traversing nodes.
|
boolean |
equals(Object o)
Equality for node objects is defined as full (deep) value
equality.
|
static NullNode |
getInstance() |
JsonNodeType |
getNodeType()
Return the type of this node
|
int |
hashCode() |
protected Object |
readResolve() |
JsonNode |
requireNonNull()
Method that may be called to verify that
this node is neither so-called
"missing node" (that is, one for which JsonNode.isMissingNode() returns true)
nor "null node" (one for which JsonNode.isNull() returns true). |
void |
serialize(com.fasterxml.jackson.core.JsonGenerator g,
SerializerProvider provider)
Method called to serialize node instances using given generator.
|
_at, deepCopy, findParent, findParents, findValue, findValues, findValuesAsText, get, get, has, has, hasNonNull, hasNonNull, isEmpty, path, path, serializeWithType_bigIntFromBigDec, _jsonPointerIfValid, _reportWrongNodeOperation, _reportWrongNodeType, _withArray, _withObject, _withXxxMayReplace, _withXxxVerifyReplace, findPath, numberType, required, required, toPrettyString, toString, traverse, traverse, withArray, withObject_reportRequiredViolation, _this, asBoolean, asBoolean, asDouble, asDouble, asInt, asInt, asLong, asLong, at, at, bigIntegerValue, binaryValue, booleanValue, canConvertToExactIntegral, canConvertToInt, canConvertToLong, decimalValue, doubleValue, elements, equals, fieldNames, fields, findParents, findValues, findValuesAsText, floatValue, intValue, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isContainerNode, isDouble, isFloat, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNull, isNumber, isObject, isPojo, isShort, isTextual, isValueNode, iterator, longValue, numberValue, properties, require, requiredAt, requiredAt, shortValue, size, textValue, with, withArray, withArray, withArray, withArrayProperty, withObject, withObject, withObject, withObjectPropertyisEmptyclone, finalize, getClass, notify, notifyAll, wait, wait, waitforEach, spliteratorpublic static final NullNode instance
protected NullNode()
NOTE: visibility raised to `protected` in 2.9.3 to allow custom subtypes.
protected Object readResolve()
public static NullNode getInstance()
public JsonNodeType getNodeType()
JsonNodegetNodeType in class JsonNodeJsonNodeType enum valuepublic com.fasterxml.jackson.core.JsonToken asToken()
BaseJsonNodeJsonToken that equivalent
stream event would produce (for most nodes there is just
one token but for structured/container types multiple)public String asText(String defaultValue)
JsonNodedefaultValue if this node
does not have a text value. Useful for nodes that are MissingNode or
NullNode, ensuring a default value is returned instead of null or missing indicators.
NOTE: This was deprecated in 2.17.0, but as discussed through [databind#4471], was un-deprecated in 2.17.1.
public String asText()
JsonNodeJsonNode.isValueNode() returns true),
otherwise empty String.public JsonNode requireNonNull()
JsonNodethis node is neither so-called
"missing node" (that is, one for which JsonNode.isMissingNode() returns true)
nor "null node" (one for which JsonNode.isNull() returns true).
If non-null non-missing node, this is returned to allow chaining; otherwise
IllegalArgumentException is thrown.requireNonNull in class JsonNodethis node to allow chainingpublic final void serialize(com.fasterxml.jackson.core.JsonGenerator g,
SerializerProvider provider)
throws IOException
BaseJsonNodeserialize in interface JsonSerializableserialize in class BaseJsonNodeIOExceptionpublic boolean equals(Object o)
JsonNode
Note: marked as abstract to ensure all implementation
classes define it properly and not rely on definition
from Object.
public int hashCode()
hashCode in class BaseJsonNodeCopyright © 2008–2024 FasterXML. All rights reserved.