public final class MissingNode extends ValueNode
In most respects this placeholder node will act as NullNode;
for example, for purposes of value conversions, value is considered
to be null and represented as value zero when used for numeric
conversions.
JsonSerializable.Base| 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.
|
<T extends JsonNode> |
deepCopy()
All current value nodes are immutable, so we can just return
them as is.
|
boolean |
equals(Object o)
Equality for node objects is defined as full (deep) value
equality.
|
static MissingNode |
getInstance() |
JsonNodeType |
getNodeType()
Return the type of this node
|
int |
hashCode() |
void |
serialize(JsonGenerator jg,
SerializerProvider provider)
Method called to serialize node instances using given generator.
|
void |
serializeWithType(JsonGenerator g,
SerializerProvider provider,
TypeSerializer typeSer)
Type information is needed, even if JsonNode instances are "plain" JSON,
since they may be mixed with other types.
|
String |
toString()
Method that will produce developer-readable representation of the
node; which may or may not be as valid JSON.
|
_at, findParent, findParents, findValue, findValues, findValuesAsText, get, get, has, has, hasNonNull, hasNonNull, path, pathfindPath, 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, withArrayisEmptypublic <T extends JsonNode> T deepCopy()
ValueNodepublic static MissingNode 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()
JsonNodeJsonNode.isValueNode() returns true),
otherwise empty String.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 final void serialize(JsonGenerator jg, SerializerProvider provider) throws IOException, JsonProcessingException
BaseJsonNodeserialize in interface JsonSerializableserialize in class BaseJsonNodeIOExceptionJsonProcessingExceptionpublic void serializeWithType(JsonGenerator g, SerializerProvider provider, TypeSerializer typeSer) throws IOException, JsonProcessingException
BaseJsonNodeserializeWithType in interface JsonSerializableserializeWithType in class ValueNodeIOExceptionJsonProcessingExceptionpublic 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 String toString()
JsonNodeObjectMapper or ObjectWriter to serialize an
instance, for example:
String json = objectMapper.writeValueAsString(rootNode);
Note: method defined as abstract to ensure all implementation
classes explicitly implement method, instead of relying
on Object.toString() definition.
public int hashCode()
hashCode in class BaseJsonNodeCopyright © 2008–2018 FasterXML. All rights reserved.