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java.lang.Object com.fasterxml.jackson.databind.JsonNode com.fasterxml.jackson.databind.node.BaseJsonNode com.fasterxml.jackson.databind.node.ValueNode com.fasterxml.jackson.databind.node.NullNode
public final class NullNode
This singleton value class is used to contain explicit JSON null value.
Field Summary | |
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static NullNode |
instance
|
Fields inherited from class com.fasterxml.jackson.databind.JsonNode |
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NO_NODES, NO_STRINGS |
Method Summary | |
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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. |
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()
|
boolean |
isNull()
Method that can be used to check if this node was created from JSON literal null value. |
void |
serialize(JsonGenerator jg,
SerializerProvider provider)
Method called to serialize node instances using given generator. |
Methods inherited from class com.fasterxml.jackson.databind.node.ValueNode |
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deepCopy, isValueNode, path, path, serializeWithType, toString |
Methods inherited from class com.fasterxml.jackson.databind.node.BaseJsonNode |
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findParent, findParents, findPath, findValue, findValues, findValuesAsText, numberType, traverse |
Methods inherited from class com.fasterxml.jackson.databind.JsonNode |
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asBoolean, asBoolean, asDouble, asDouble, asInt, asInt, asLong, asLong, bigIntegerValue, binaryValue, booleanValue, canConvertToInt, canConvertToLong, decimalValue, doubleValue, elements, fieldNames, fields, findParents, findValues, findValuesAsText, get, get, has, has, hasNonNull, hasNonNull, intValue, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isContainerNode, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNumber, isObject, isPojo, isTextual, iterator, longValue, numberValue, size, textValue, with, withArray |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final NullNode instance
Method Detail |
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public static NullNode getInstance()
public JsonToken asToken()
BaseJsonNode
JsonToken
that equivalent
stream event would produce (for most nodes there is just
one token but for structured/container types multiple)
asToken
in interface TreeNode
asToken
in class ValueNode
public boolean isNull()
JsonNode
isNull
in class JsonNode
public String asText()
JsonNode
JsonNode.isValueNode()
returns true),
otherwise empty String.
asText
in class JsonNode
public final void serialize(JsonGenerator jg, SerializerProvider provider) throws IOException, JsonProcessingException
BaseJsonNode
serialize
in interface JsonSerializable
serialize
in class BaseJsonNode
IOException
JsonProcessingException
public boolean equals(Object o)
JsonNode
Note: marked as abstract to ensure all implementation
classes define it properly and not rely on definition
from Object
.
equals
in class JsonNode
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