|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.codehaus.jackson.JsonNode
org.codehaus.jackson.node.BaseJsonNode
org.codehaus.jackson.node.MissingNode
public final class MissingNode
This singleton node class is generated to denote "missing nodes" along paths that do not exist. For example, if a path via element of an array is requested for an element outside range of elements in the array; or for a non-array value, result will be reference to this node.
Method Summary | |
---|---|
JsonToken |
asToken()
Method that can be used for efficient type detection when using stream abstraction for traversing nodes. |
boolean |
equals(Object o)
Note: marked as abstract to ensure all implementation classes define it properly. |
static MissingNode |
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 |
isMissingNode()
Method that returns true for "virtual" nodes which represent missing entries constructed by path accessor methods when there is no actual node matching given criteria. |
JsonNode |
path(int index)
This method is similar to JsonNode.get(int) , except
that instead of returning null if no such element exists (due
to index being out of range, or this node not being an array),
a "missing node" (node that returns true for
JsonNode.isMissingNode() ) will be returned. |
JsonNode |
path(String fieldName)
This method is similar to JsonNode.get(String) , except
that instead of returning null if no such value exists (due
to this node not being an object, or object not having value
for the specified field),
a "missing node" (node that returns true for
JsonNode.isMissingNode() ) will be returned. |
void |
serialize(JsonGenerator jg,
SerializerProvider provider)
Method called to serialize node instances using given generator. |
String |
toString()
Note: marked as abstract to ensure all implementation classes define it properly. |
Methods inherited from class org.codehaus.jackson.node.BaseJsonNode |
---|
getNumberType, serializeWithType, traverse, writeTo |
Methods inherited from class org.codehaus.jackson.JsonNode |
---|
get, get, getBigIntegerValue, getBinaryValue, getBooleanValue, getDecimalValue, getDoubleValue, getElements, getElementValue, getFieldNames, getFieldValue, getIntValue, getLongValue, getNumberValue, getPath, getPath, getTextValue, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isContainerNode, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isNull, isNumber, isObject, isPojo, isTextual, isValueNode, iterator, size |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Method Detail |
---|
public static MissingNode 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 class BaseJsonNode
public boolean isMissingNode()
JsonNode
Note: one and only one of methods JsonNode.isValueNode()
,
JsonNode.isContainerNode()
and JsonNode.isMissingNode()
ever
returns true for any given node.
isMissingNode
in class JsonNode
public String getValueAsText()
JsonNode
JsonNode.isValueNode()
returns true), otherwise null.
Note: to serialize nodes of any type, you should call
JsonNode.toString()
instead.
getValueAsText
in class JsonNode
public JsonNode path(String fieldName)
JsonNode
JsonNode.get(String)
, except
that instead of returning null if no such value exists (due
to this node not being an object, or object not having value
for the specified field),
a "missing node" (node that returns true for
JsonNode.isMissingNode()
) will be returned. This allows for
convenient and safe chained access via path calls.
path
in class JsonNode
public JsonNode path(int index)
JsonNode
JsonNode.get(int)
, except
that instead of returning null if no such element exists (due
to index being out of range, or this node not being an array),
a "missing node" (node that returns true for
JsonNode.isMissingNode()
) will be returned. This allows for
convenient and safe chained access via path calls.
path
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.
equals
in class JsonNode
public String toString()
JsonNode
Note: marked as abstract to ensure all implementation classes define it properly.
toString
in class JsonNode
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |