public final class NullNode extends ValueNode
JsonSerializable.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)
Method similar to
JsonNode.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. |
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() |
void |
serialize(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, path, path, serializeWithType, toStringfindPath, numberType, traverse, traverseasBoolean, asBoolean, asDouble, asDouble, asInt, asInt, asLong, asLong, at, at, bigIntegerValue, binaryValue, booleanValue, 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, shortValue, size, textValue, with, withArrayisEmptyclone, 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.
public static NullNode getInstance()
public JsonNodeType getNodeType()
JsonNodegetNodeType in class JsonNodeJsonNodeType enum valuepublic 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)
JsonNodeJsonNode.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.public String asText()
JsonNodeJsonNode.isValueNode() returns true),
otherwise empty String.public final void serialize(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 © 2008–2018 FasterXML. All rights reserved.