public class FilteringGeneratorDelegate extends JsonGeneratorDelegate
JsonGeneratorDelegate
that allows use of
TokenFilter
for outputting a subset of content that
caller tries to generate.JsonGenerator.Feature
Modifier and Type | Field and Description |
---|---|
protected boolean |
_allowMultipleMatches
Flag that determines whether filtering will continue after the first
match is indicated or not: if `false`, output is based on just the first
full match (returning
TokenFilter.INCLUDE_ALL ) and no more
checks are made; if `true` then filtering will be applied as necessary
until end of content. |
protected TokenFilterContext |
_filterContext
Although delegate has its own output context it is not sufficient since we actually
have to keep track of excluded (filtered out) structures as well as ones delegate
actually outputs.
|
protected boolean |
_includeImmediateParent
Deprecated.
|
protected boolean |
_includePath
Flag that determines whether path leading up to included content should
also be automatically included or not.
|
protected TokenFilter |
_itemFilter
State that applies to the item within container, used where applicable.
|
protected int |
_matchCount
Number of tokens for which
TokenFilter.INCLUDE_ALL
has been returned |
protected TokenFilter |
rootFilter
Object consulted to determine whether to write parts of content generator
is asked to write or not.
|
delegate, delegateCopyMethods
_cfgPrettyPrinter
Constructor and Description |
---|
FilteringGeneratorDelegate(JsonGenerator d,
TokenFilter f,
boolean includePath,
boolean allowMultipleMatches) |
Modifier and Type | Method and Description |
---|---|
protected boolean |
_checkBinaryWrite() |
protected void |
_checkParentPath() |
protected void |
_checkPropertyParentPath()
Specialized variant of
_checkParentPath() used when checking
parent for a property name to be included with value: rules are slightly
different. |
protected boolean |
_checkRawValueWrite() |
TokenFilter |
getFilter() |
JsonStreamContext |
getFilterContext() |
int |
getMatchCount()
Accessor for finding number of matches, where specific token and sub-tree
starting (if structured type) are passed.
|
JsonStreamContext |
getOutputContext() |
void |
writeBinary(Base64Variant b64variant,
byte[] data,
int offset,
int len)
Method that will output given chunk of binary data as base64
encoded, as a complete String value (surrounded by double quotes).
|
int |
writeBinary(Base64Variant b64variant,
InputStream data,
int dataLength)
Method similar to
JsonGenerator.writeBinary(Base64Variant,byte[],int,int) ,
but where input is provided through a stream, allowing for incremental
writes without holding the whole input in memory. |
void |
writeBoolean(boolean v)
Method for outputting literal JSON boolean value (one of
Strings 'true' and 'false').
|
void |
writeEndArray()
Method for writing closing marker of a JSON Array value
(character ']'; plus possible white space decoration
if pretty-printing is enabled).
|
void |
writeEndObject()
Method for writing closing marker of a JSON Object value
(character '}'; plus possible white space decoration
if pretty-printing is enabled).
|
void |
writeFieldName(SerializableString name)
Method similar to
JsonGenerator.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. |
void |
writeFieldName(String name)
Method for writing a field name (JSON String surrounded by
double quotes: syntactically identical to a JSON String value),
possibly decorated by white space if pretty-printing is enabled.
|
void |
writeNull()
Method for outputting literal JSON null value.
|
void |
writeNumber(BigDecimal v)
Method for outputting indicate JSON numeric value.
|
void |
writeNumber(BigInteger v)
Method for outputting given value as JSON number.
|
void |
writeNumber(double v)
Method for outputting indicate JSON numeric value.
|
void |
writeNumber(float v)
Method for outputting indicate JSON numeric value.
|
void |
writeNumber(int v)
Method for outputting given value as JSON number.
|
void |
writeNumber(long v)
Method for outputting given value as JSON number.
|
void |
writeNumber(short v)
Method for outputting given value as JSON number.
|
void |
writeNumber(String encodedValue)
Write method that can be used for custom numeric types that can
not be (easily?) converted to "standard" Java number types.
|
void |
writeObjectId(Object id)
Method that can be called to output so-called native Object Id.
|
void |
writeObjectRef(Object id)
Method that can be called to output references to native Object Ids.
|
void |
writeOmittedField(String fieldName)
Method called to indicate that a property in this position was
skipped.
|
void |
writeRaw(char c)
Method that will force generator to copy
input text verbatim with no modifications (including
that no escaping is done and no separators are added even
if context [array, object] would otherwise require such).
|
void |
writeRaw(char[] text,
int offset,
int len)
Method that will force generator to copy
input text verbatim with no modifications (including
that no escaping is done and no separators are added even
if context [array, object] would otherwise require such).
|
void |
writeRaw(SerializableString text)
Method that will force generator to copy
input text verbatim with no modifications (including
that no escaping is done and no separators are added even
if context [array, object] would otherwise require such).
|
void |
writeRaw(String text)
Method that will force generator to copy
input text verbatim with no modifications (including
that no escaping is done and no separators are added even
if context [array, object] would otherwise require such).
|
void |
writeRaw(String text,
int offset,
int len)
Method that will force generator to copy
input text verbatim with no modifications (including
that no escaping is done and no separators are added even
if context [array, object] would otherwise require such).
|
void |
writeRawUTF8String(byte[] text,
int offset,
int length)
Method similar to
JsonGenerator.writeString(String) but that takes as
its input a UTF-8 encoded String that is to be output as-is, without additional
escaping (type of which depends on data format; backslashes for JSON). |
void |
writeRawValue(char[] text,
int offset,
int len) |
void |
writeRawValue(String text)
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).
|
void |
writeRawValue(String text,
int offset,
int len) |
void |
writeStartArray()
Method for writing starting marker of a Array value
(for JSON this is character '['; plus possible white space decoration
if pretty-printing is enabled).
|
void |
writeStartArray(int size)
Method for writing start marker of an Array value, similar
to
JsonGenerator.writeStartArray() , but also specifying how many
elements will be written for the array before calling
JsonGenerator.writeEndArray() . |
void |
writeStartObject()
Method for writing starting marker of a JSON Object value
(character '{'; plus possible white space decoration
if pretty-printing is enabled).
|
void |
writeStartObject(Object forValue)
Method for writing starting marker of a JSON Object value
(character '{'; plus possible white space decoration
if pretty-printing is enabled), to represent Java given
as the argument.
|
void |
writeString(char[] text,
int offset,
int len)
Method for outputting a String value.
|
void |
writeString(SerializableString value)
Method similar to
JsonGenerator.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. |
void |
writeString(String value)
Method for outputting a String value.
|
void |
writeTypeId(Object id)
Method that can be called to output so-called native Type Id.
|
void |
writeUTF8String(byte[] text,
int offset,
int length)
Method similar to
JsonGenerator.writeString(String) but that takes as its input
a UTF-8 encoded String which has not been escaped using whatever
escaping scheme data format requires (for JSON that is backslash-escaping
for control characters and double-quotes; for other formats something else). |
canOmitFields, canUseSchema, canWriteBinaryNatively, canWriteObjectId, canWriteTypeId, close, copyCurrentEvent, copyCurrentStructure, disable, enable, flush, getCharacterEscapes, getCodec, getCurrentValue, getDelegate, getFeatureMask, getHighestEscapedChar, getOutputBuffered, getOutputTarget, getPrettyPrinter, getSchema, isClosed, isEnabled, overrideFormatFeatures, overrideStdFeatures, setCharacterEscapes, setCodec, setCurrentValue, setFeatureMask, setHighestNonEscapedChar, setPrettyPrinter, setRootValueSeparator, setSchema, useDefaultPrettyPrinter, version, writeArray, writeArray, writeArray, writeEmbeddedObject, writeFieldId, writeObject, writeString, writeTree
_reportError, _reportUnsupportedOperation, _throwInternal, _verifyOffsets, _writeSimpleObject, canWriteFormattedNumbers, configure, getFormatFeatures, writeArrayFieldStart, writeBinary, writeBinary, writeBinary, writeBinaryField, writeBooleanField, writeNullField, writeNumberField, writeNumberField, writeNumberField, writeNumberField, writeNumberField, writeObjectField, writeObjectFieldStart, writeRawValue, writeStringField, writeTypePrefix, writeTypeSuffix
protected TokenFilter rootFilter
protected boolean _allowMultipleMatches
TokenFilter.INCLUDE_ALL
) and no more
checks are made; if `true` then filtering will be applied as necessary
until end of content.protected boolean _includePath
@Deprecated protected boolean _includeImmediateParent
protected TokenFilterContext _filterContext
protected TokenFilter _itemFilter
protected int _matchCount
TokenFilter.INCLUDE_ALL
has been returnedpublic FilteringGeneratorDelegate(JsonGenerator d, TokenFilter f, boolean includePath, boolean allowMultipleMatches)
public TokenFilter getFilter()
public JsonStreamContext getFilterContext()
public int getMatchCount()
public JsonStreamContext getOutputContext()
getOutputContext
in class JsonGeneratorDelegate
public void writeStartArray() throws IOException
JsonGenerator
Array values can be written in any context where values are allowed: meaning everywhere except for when a field name is expected.
writeStartArray
in class JsonGeneratorDelegate
IOException
public void writeStartArray(int size) throws IOException
JsonGenerator
JsonGenerator.writeStartArray()
, but also specifying how many
elements will be written for the array before calling
JsonGenerator.writeEndArray()
.
Default implementation simply calls JsonGenerator.writeStartArray()
.
writeStartArray
in class JsonGeneratorDelegate
size
- Number of elements this array will have: actual
number of values written (before matching call to
JsonGenerator.writeEndArray()
MUST match; generator MAY verify
this is the case.IOException
public void writeEndArray() throws IOException
JsonGenerator
Marker can be written if the innermost structured type is Array.
writeEndArray
in class JsonGeneratorDelegate
IOException
public void writeStartObject() throws IOException
JsonGenerator
Object values can be written in any context where values are allowed: meaning everywhere except for when a field name is expected.
writeStartObject
in class JsonGeneratorDelegate
IOException
public void writeStartObject(Object forValue) throws IOException
JsonGenerator
Object values can be written in any context where values are allowed: meaning everywhere except for when a field name is expected.
writeStartObject
in class JsonGeneratorDelegate
IOException
public void writeEndObject() throws IOException
JsonGenerator
Marker can be written if the innermost structured type is Object, and the last written event was either a complete value, or START-OBJECT marker (see JSON specification for more details).
writeEndObject
in class JsonGeneratorDelegate
IOException
public void writeFieldName(String name) throws IOException
JsonGenerator
Field names can only be written in Object context (check out JSON specification for details), when field name is expected (field names alternate with values).
writeFieldName
in class JsonGeneratorDelegate
IOException
public void writeFieldName(SerializableString name) throws IOException
JsonGenerator
JsonGenerator.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.
writeFieldName
in class JsonGeneratorDelegate
IOException
public void writeString(String value) throws IOException
JsonGenerator
writeString
in class JsonGeneratorDelegate
IOException
public void writeString(char[] text, int offset, int len) throws IOException
JsonGenerator
writeString
in class JsonGeneratorDelegate
IOException
public void writeString(SerializableString value) throws IOException
JsonGenerator
JsonGenerator.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 JsonGenerator.writeString(String)
;
sub-classes should override it with more efficient implementation
if possible.
writeString
in class JsonGeneratorDelegate
IOException
public void writeRawUTF8String(byte[] text, int offset, int length) throws IOException
JsonGenerator
JsonGenerator.writeString(String)
but that takes as
its input a UTF-8 encoded String that is to be output as-is, without additional
escaping (type of which depends on data format; backslashes for JSON).
However, quoting that data format requires (like double-quotes for JSON) will be added
around the value if and as necessary.
Note that some backends may choose not to support this method: for
example, if underlying destination is a Writer
using this method would require UTF-8 decoding.
If so, implementation may instead choose to throw a
UnsupportedOperationException
due to ineffectiveness
of having to decode input.
writeRawUTF8String
in class JsonGeneratorDelegate
IOException
public void writeUTF8String(byte[] text, int offset, int length) throws IOException
JsonGenerator
JsonGenerator.writeString(String)
but that takes as its input
a UTF-8 encoded String which has not been escaped using whatever
escaping scheme data format requires (for JSON that is backslash-escaping
for control characters and double-quotes; for other formats something else).
This means that textual JSON backends need to check if value needs
JSON escaping, but otherwise can just be copied as is to output.
Also, quoting that data format requires (like double-quotes for JSON) will be added
around the value if and as necessary.
Note that some backends may choose not to support this method: for
example, if underlying destination is a Writer
using this method would require UTF-8 decoding.
In this case
generator implementation may instead choose to throw a
UnsupportedOperationException
due to ineffectiveness
of having to decode input.
writeUTF8String
in class JsonGeneratorDelegate
IOException
public void writeRaw(String text) throws IOException
JsonGenerator
JsonGenerator.writeRawValue(String)
instead.
Note that not all generator implementations necessarily support
such by-pass methods: those that do not will throw
UnsupportedOperationException
.
writeRaw
in class JsonGeneratorDelegate
IOException
public void writeRaw(String text, int offset, int len) throws IOException
JsonGenerator
JsonGenerator.writeRawValue(String)
instead.
Note that not all generator implementations necessarily support
such by-pass methods: those that do not will throw
UnsupportedOperationException
.
writeRaw
in class JsonGeneratorDelegate
IOException
public void writeRaw(SerializableString text) throws IOException
JsonGenerator
JsonGenerator.writeRawValue(String)
instead.
Note that not all generator implementations necessarily support
such by-pass methods: those that do not will throw
UnsupportedOperationException
.
The default implementation delegates to JsonGenerator.writeRaw(String)
;
other backends that support raw inclusion of text are encouraged
to implement it in more efficient manner (especially if they
use UTF-8 encoding).
writeRaw
in class JsonGeneratorDelegate
IOException
public void writeRaw(char[] text, int offset, int len) throws IOException
JsonGenerator
JsonGenerator.writeRawValue(String)
instead.
Note that not all generator implementations necessarily support
such by-pass methods: those that do not will throw
UnsupportedOperationException
.
writeRaw
in class JsonGeneratorDelegate
IOException
public void writeRaw(char c) throws IOException
JsonGenerator
JsonGenerator.writeRawValue(String)
instead.
Note that not all generator implementations necessarily support
such by-pass methods: those that do not will throw
UnsupportedOperationException
.
writeRaw
in class JsonGeneratorDelegate
IOException
public void writeRawValue(String text) throws IOException
JsonGenerator
writeRawValue
in class JsonGeneratorDelegate
IOException
public void writeRawValue(String text, int offset, int len) throws IOException
writeRawValue
in class JsonGeneratorDelegate
IOException
public void writeRawValue(char[] text, int offset, int len) throws IOException
writeRawValue
in class JsonGeneratorDelegate
IOException
public void writeBinary(Base64Variant b64variant, byte[] data, int offset, int len) throws IOException
JsonGenerator
Note: because JSON Strings can not contain unescaped linefeeds,
if linefeeds are included (as per last argument), they must be
escaped. This adds overhead for decoding without improving
readability.
Alternatively if linefeeds are not included,
resulting String value may violate the requirement of base64
RFC which mandates line-length of 76 characters and use of
linefeeds. However, all JsonParser
implementations
are required to accept such "long line base64"; as do
typical production-level base64 decoders.
writeBinary
in class JsonGeneratorDelegate
b64variant
- Base64 variant to use: defines details such as
whether padding is used (and if so, using which character);
what is the maximum line length before adding linefeed,
and also the underlying alphabet to use.IOException
public int writeBinary(Base64Variant b64variant, InputStream data, int dataLength) throws IOException
JsonGenerator
JsonGenerator.writeBinary(Base64Variant,byte[],int,int)
,
but where input is provided through a stream, allowing for incremental
writes without holding the whole input in memory.writeBinary
in class JsonGeneratorDelegate
b64variant
- Base64 variant to usedata
- InputStream to use for reading binary data to write.
Will not be closed after successful write operationdataLength
- (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 payloadIOException
public void writeNumber(short v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(int v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(long v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(BigInteger v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(double v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(float v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(BigDecimal v) throws IOException
JsonGenerator
writeNumber
in class JsonGeneratorDelegate
v
- Number value to writeIOException
public void writeNumber(String encodedValue) throws IOException, UnsupportedOperationException
JsonGenerator
JsonGenerator.writeString(java.lang.String)
method can not be used; nor
JsonGenerator.writeRaw(java.lang.String)
because that does not properly handle
value separators needed in Array or Object contexts.
Note: because of lack of type safety, some generator
implementations may not be able to implement this
method. For example, if a binary JSON format is used,
it may require type information for encoding; similarly
for generator-wrappers around Java objects or JSON nodes.
If implementation does not implement this method,
it needs to throw UnsupportedOperationException
.
writeNumber
in class JsonGeneratorDelegate
UnsupportedOperationException
- If underlying data format does not
support numbers serialized textually AND if generator is not allowed
to just output a String instead (Schema-based formats may require actual
number, for example)IOException
public void writeBoolean(boolean v) throws IOException
JsonGenerator
writeBoolean
in class JsonGeneratorDelegate
IOException
public void writeNull() throws IOException
JsonGenerator
writeNull
in class JsonGeneratorDelegate
IOException
public void writeOmittedField(String fieldName) throws IOException
JsonGenerator
false
from JsonGenerator.canOmitFields()
.
Default implementation does nothing.
writeOmittedField
in class JsonGeneratorDelegate
IOException
public void writeObjectId(Object id) throws IOException
JsonGenerator
JsonGenerator.canWriteObjectId()
), as not all data formats
have native type id support; and some may only allow them in
certain positions or locations.
If output is not allowed by the data format in this position,
a JsonGenerationException
will be thrown.writeObjectId
in class JsonGeneratorDelegate
IOException
public void writeObjectRef(Object id) throws IOException
JsonGenerator
JsonGenerator.canWriteObjectId()
), as not all data formats
have native type id support; and some may only allow them in
certain positions or locations.
If output is not allowed by the data format in this position,
a JsonGenerationException
will be thrown.writeObjectRef
in class JsonGeneratorDelegate
IOException
public void writeTypeId(Object id) throws IOException
JsonGenerator
JsonGenerator.canWriteTypeId()
), as not all data formats
have native type id support; and some may only allow them in
certain positions or locations.
If output is not allowed by the data format in this position,
a JsonGenerationException
will be thrown.writeTypeId
in class JsonGeneratorDelegate
IOException
protected void _checkParentPath() throws IOException
IOException
protected void _checkPropertyParentPath() throws IOException
_checkParentPath()
used when checking
parent for a property name to be included with value: rules are slightly
different.IOException
protected boolean _checkBinaryWrite() throws IOException
IOException
protected boolean _checkRawValueWrite() throws IOException
IOException
Copyright © 2019 JBoss by Red Hat. All rights reserved.