java.lang.Object | ||
↳ | com.fasterxml.jackson.core.JsonGenerator | |
↳ | com.fasterxml.jackson.core.base.GeneratorBase |
Known Direct Subclasses |
This base class implements part of API that a JSON generator exposes to applications, adds shared internal methods that sub-classes can use and adds some abstract methods sub-classes must implement.
Fields | |||||||||||
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_cfgNumbersAsStrings | Flag set to indicate that implicit conversion from number
to JSON String is needed (as per
WRITE_NUMBERS_AS_STRINGS ). |
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_closed | Flag that indicates whether generator is closed or not. | ||||||||||
_features | Bit flag composed of bits that indicate which
JsonGenerator.Feature s
are enabled. |
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_objectCodec | |||||||||||
_writeContext | Object that keeps track of the current contextual state of the generator. |
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Inherited Fields | |||||||||||
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From class
com.fasterxml.jackson.core.JsonGenerator
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Protected Constructors | |||||||||||
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Public Methods | |||||||||||
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Method called to close this generator, so that no more content
can be written.
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Method for copying contents of the current event that
the given parser instance points to.
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Method for copying contents of the current event
and following events that it encloses
the given parser instance points to.
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Method for disabling specified features
(check
JsonGenerator.Feature for list of features) | |||||||||||
Method for enabling specified parser features:
check
JsonGenerator.Feature for list of available features. | |||||||||||
Method called to flush any buffered content to the underlying
target (output stream, writer), and to flush the target itself
as well.
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Method for accessing the object used for writing Java
object as Json content
(using method
writeObject(Object) ). | |||||||||||
Note: co-variant return type.
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Method that can be called to determine whether this generator
is closed or not.
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Method for checking whether given feature is enabled.
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Method that can be called to set or reset the object to
use for writing Java objects as JsonContent
(using method
writeObject(Object) ). | |||||||||||
Convenience method for enabling pretty-printing using
the default pretty printer
(
DefaultPrettyPrinter ). | |||||||||||
Implemented with detection that tries to find "VERSION.txt" in same
package as the implementation class.
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Method similar to
writeBinary(Base64Variant, byte[], int, int) ,
but where input is provided through a stream, allowing for incremental
writes without holding the whole input in memory. | |||||||||||
Method similar to
writeFieldName(String) , main difference
being that it may perform better as some of processing (such as
quoting of certain characters, or encoding into external encoding
if supported by generator) can be done just once and reused for
later calls. | |||||||||||
Method for writing given Java object (POJO) as Json.
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Method that will force generator to copy
input text verbatim without any modifications, but assuming
it must constitute a single legal JSON value (number, string,
boolean, null, Array or List).
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Method similar to
writeString(String) , but that takes
SerializableString which can make this potentially
more efficient to call as generator may be able to reuse
quoted and/or encoded representation. | |||||||||||
Method for writing given JSON tree (expressed as a tree
where given JsonNode is the root) using this generator.
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Protected Methods | |||||||||||
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Helper method to try to call appropriate write method for given
untyped Object.
|
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Inherited Methods | |||||||||||
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From class
com.fasterxml.jackson.core.JsonGenerator
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From class
java.lang.Object
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From interface
com.fasterxml.jackson.core.Versioned
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From interface
java.io.Closeable
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From interface
java.io.Flushable
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From interface
java.lang.AutoCloseable
|
Flag set to indicate that implicit conversion from number
to JSON String is needed (as per
WRITE_NUMBERS_AS_STRINGS
).
Flag that indicates whether generator is closed or not. Gets
set when it is closed by an explicit call
(close()
).
Bit flag composed of bits that indicate which
JsonGenerator.Feature
s
are enabled.
Object that keeps track of the current contextual state of the generator.
Method called to close this generator, so that no more content can be written.
Whether the underlying target (stream, writer) gets closed depends
on whether this generator either manages the target (i.e. is the
only one with access to the target -- case if caller passes a
reference to the resource such as File, but not stream); or
has feature AUTO_CLOSE_TARGET
enabled.
If either of above is true, the target is also closed. Otherwise
(not managing, feature not enabled), target is not closed.
IOException |
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Method for copying contents of the current event that the given parser instance points to. Note that the method will not copy any other events, such as events contained within Json Array or Object structures.
Calling this method will not advance the given parser, although it may cause parser to internally process more data (if it lazy loads contents of value events, for example)
Method for copying contents of the current event and following events that it encloses the given parser instance points to.
So what constitutes enclosing? Here is the list of events that have associated enclosed events that will get copied:
START_OBJECT
:
all events up to and including matching (closing)
END_OBJECT
will be copied
START_ARRAY
all events up to and including matching (closing)
END_ARRAY
will be copied
FIELD_NAME
the logical value (which
can consist of a single scalar value; or a sequence of related
events for structured types (Json Arrays, Objects)) will
be copied along with the name itself. So essentially the
whole field entry (name and value) will be copied.
After calling this method, parser will point to the last event that was copied. This will either be the event parser already pointed to (if there were no enclosed events), or the last enclosed event copied.
Method for disabling specified features
(check JsonGenerator.Feature
for list of features)
Method for enabling specified parser features:
check JsonGenerator.Feature
for list of available features.
Method called to flush any buffered content to the underlying target (output stream, writer), and to flush the target itself as well.
IOException |
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Method for accessing the object used for writing Java
object as Json content
(using method writeObject(Object)
).
Note: co-variant return type.
Method that can be called to determine whether this generator is closed or not. If it is closed, no more output can be done.
Method for checking whether given feature is enabled.
Check JsonGenerator.Feature
for list of available features.
Method that can be called to set or reset the object to
use for writing Java objects as JsonContent
(using method writeObject(Object)
).
Convenience method for enabling pretty-printing using
the default pretty printer
(DefaultPrettyPrinter
).
Implemented with detection that tries to find "VERSION.txt" in same package as the implementation class.
Method similar to writeBinary(Base64Variant, byte[], int, int)
,
but where input is provided through a stream, allowing for incremental
writes without holding the whole input in memory.
b64variant | Base64 variant to use |
---|---|
data | InputStream to use for reading binary data to write. Will not be closed after successful write operation |
dataLength | (optional) number of bytes that will be available;
or -1 to be indicate it is not known.
If a positive length is given, data MUST provide at least
that many bytes: if not, an exception will be thrown.
Note that implementations
need not support cases where length is not known in advance; this
depends on underlying data format: JSON output does NOT require length,
other formats may. |
data
and written as binary payloadMethod similar to writeFieldName(String)
, main difference
being that it may perform better as some of processing (such as
quoting of certain characters, or encoding into external encoding
if supported by generator) can be done just once and reused for
later calls.
Default implementation simple uses unprocessed name container in serialized String; implementations are strongly encouraged to make use of more efficient methods argument object has.
Method for writing given Java object (POJO) as Json. Exactly how the object gets written depends on object in question (ad on codec, its configuration); for most beans it will result in Json object, but for others Json array, or String or numeric value (and for nulls, Json null literal. NOTE: generator must have its object codec set to non-null value; for generators created by a mapping factory this is the case, for others not.
Method that will force generator to copy input text verbatim without any modifications, but assuming it must constitute a single legal JSON value (number, string, boolean, null, Array or List). Assuming this, proper separators are added if and as needed (comma or colon), and generator state updated to reflect this.
Method similar to writeString(String)
, but that takes
SerializableString
which can make this potentially
more efficient to call as generator may be able to reuse
quoted and/or encoded representation.
Default implementation just calls writeString(String)
;
sub-classes should override it with more efficient implementation
if possible.
Method for writing given JSON tree (expressed as a tree
where given JsonNode is the root) using this generator.
This will generally just call
writeObject(Object)
with given node, but is added
for convenience and to make code more explicit in cases
where it deals specifically with trees.
Helper method to try to call appropriate write method for given untyped Object. At this point, no structural conversions should be done, only simple basic types are to be coerced as necessary.
value | Non-null value to write |
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