org.codehaus.jackson.map.impl
Class NullNode

java.lang.Object
  org.codehaus.jackson.map.JsonNode
      org.codehaus.jackson.map.impl.ValueNode
          org.codehaus.jackson.map.impl.NullNode

public final class NullNode
extends ValueNode

This singleton value class is used to contain explicit JSON null value.

Method Summary

boolean	equals(Object o) Let's mark this standard method as abstract to ensure all implementation classes define it
static NullNode	getInstance()
String	getValueAsText() Method that will return valid String representation of the container value, if the node is a value node (method JsonNode.isValueNode() returns true), otherwise null.
boolean	isNull()
void	writeTo(JsonGenerator jg) Method that can be called to serialize this node and all of its descendants using specified JSON generator.

Methods inherited from class org.codehaus.jackson.map.impl.ValueNode

getPath, getPath, isValueNode, toString

Methods inherited from class org.codehaus.jackson.map.JsonNode

appendElement, getBooleanValue, getDecimalValue, getDoubleValue, getElements, getElementValue, getFieldNames, getFieldValue, getFieldValues, getIntValue, getLongValue, getNumberValue, getTextValue, insertElement, isArray, isBigDecimal, isBoolean, isContainerNode, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNumber, isObject, isTextual, removeElement, removeElement, reportNoArrayMods, reportNoObjectMods, setElement, setElement, size

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static NullNode getInstance()

isNull

public boolean isNull()

Overrides:

isNull in class JsonNode

getValueAsText

public String getValueAsText()

Description copied from class: JsonNode

Method that will return valid String representation of the container value, if the node is a value node (method JsonNode.isValueNode() returns true), otherwise null.

Note: to serialize nodes of any type, you should call JsonNode.toString() instead.

Specified by:

getValueAsText in class JsonNode

writeTo

public void writeTo(JsonGenerator jg)
             throws IOException,
                    JsonGenerationException

Description copied from class: JsonNode

Method that can be called to serialize this node and all of its descendants using specified JSON generator.

Specified by:

writeTo in class JsonNode

Throws:

IOException

JsonGenerationException

equals

public boolean equals(Object o)

Description copied from class: JsonNode

Let's mark this standard method as abstract to ensure all implementation classes define it

Specified by:

equals in class JsonNode