public class ReaderBasedJsonParser extends ParserBase
JsonParser
, which is
based on a Reader
to handle low-level character
conversion tasks.JsonParser.Feature, JsonParser.NumberType
Constructor and Description |
---|
ReaderBasedJsonParser(IOContext ctxt,
int features,
java.io.Reader r,
ObjectCodec codec,
CharsToNameCanonicalizer st)
Method called when input comes as a
Reader , and buffer allocation
can be done using default mechanism. |
ReaderBasedJsonParser(IOContext ctxt,
int features,
java.io.Reader r,
ObjectCodec codec,
CharsToNameCanonicalizer st,
char[] inputBuffer,
int start,
int end,
boolean bufferRecyclable)
Method called when caller wants to provide input buffer directly,
and it may or may not be recyclable use standard recycle context.
|
Modifier and Type | Method and Description |
---|---|
void |
finishToken()
Method that may be used to force full handling of the current token
so that even if lazy processing is enabled, the whole contents are
read for possible retrieval.
|
byte[] |
getBinaryValue(Base64Variant b64variant)
Method that can be used to read (and consume -- results
may not be accessible using other methods after the call)
base64-encoded binary data
included in the current textual JSON value.
|
ObjectCodec |
getCodec()
Accessor for
ObjectCodec associated with this
parser, if any. |
JsonLocation |
getCurrentLocation()
Method that returns location of the last processed character;
usually for error reporting purposes
|
java.lang.Object |
getInputSource()
Method that can be used to get access to object that is used
to access input being parsed; this is usually either
InputStream or Reader , depending on what
parser was constructed with. |
java.lang.String |
getText()
Method for accessing textual representation of the current event;
if no current event (before first call to
nextToken() , or
after encountering end-of-input), returns null. |
int |
getText(java.io.Writer writer)
Method to read the textual representation of the current token in chunks and
pass it to the given Writer.
|
char[] |
getTextCharacters()
Method similar to
JsonParser.getText() , but that will return
underlying (unmodifiable) character array that contains
textual value, instead of constructing a String object
to contain this information. |
int |
getTextLength()
Accessor used with
JsonParser.getTextCharacters() , to know length
of String stored in returned buffer. |
int |
getTextOffset()
Accessor used with
JsonParser.getTextCharacters() , to know offset
of the first text content character within buffer. |
JsonLocation |
getTokenLocation()
Method that return the starting location of the current
token; that is, position of the first character from input
that starts the current token.
|
java.lang.String |
getValueAsString()
Method that will try to convert value of current token to a
String . |
java.lang.String |
getValueAsString(java.lang.String defValue)
Method that will try to convert value of current token to a
String . |
java.lang.Boolean |
nextBooleanValue()
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
if it is JsonToken.VALUE_TRUE or JsonToken.VALUE_FALSE
returns matching Boolean value; otherwise return null. |
java.lang.String |
nextFieldName()
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
verifies whether it is JsonToken.FIELD_NAME ; if it is,
returns same as JsonParser.getCurrentName() , otherwise null. |
boolean |
nextFieldName(SerializableString sstr)
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
verifies whether it is JsonToken.FIELD_NAME with specified name
and returns result of that comparison. |
int |
nextIntValue(int defaultValue)
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
if it is JsonToken.VALUE_NUMBER_INT returns 32-bit int value;
otherwise returns specified default value
It is functionally equivalent to: |
long |
nextLongValue(long defaultValue)
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
if it is JsonToken.VALUE_NUMBER_INT returns 64-bit long value;
otherwise returns specified default value
It is functionally equivalent to: |
java.lang.String |
nextTextValue()
Method that fetches next token (as if calling
JsonParser.nextToken() ) and
if it is JsonToken.VALUE_STRING returns contained String value;
otherwise returns null. |
JsonToken |
nextToken()
Main iteration method, which will advance stream enough
to determine type of the next token, if any.
|
int |
readBinaryValue(Base64Variant b64variant,
java.io.OutputStream out)
Similar to
JsonParser.readBinaryValue(OutputStream) but allows explicitly
specifying base64 variant to use. |
int |
releaseBuffered(java.io.Writer w)
Method that can be called to push back any content that
has been read but not consumed by the parser.
|
void |
setCodec(ObjectCodec c)
Setter that allows defining
ObjectCodec associated with this
parser, if any. |
_getByteArrayBuilder, close, disable, enable, getBigIntegerValue, getCurrentName, getCurrentValue, getDecimalValue, getDoubleValue, getFloatValue, getIntValue, getLongValue, getNumberType, getNumberValue, getParsingContext, getTokenCharacterOffset, getTokenColumnNr, getTokenLineNr, hasTextCharacters, isClosed, isNaN, overrideCurrentName, overrideStdFeatures, setCurrentValue, setFeatureMask, version
clearCurrentToken, currentToken, currentTokenId, getCurrentToken, getCurrentTokenId, getLastClearedToken, getValueAsBoolean, getValueAsDouble, getValueAsInt, getValueAsInt, getValueAsLong, getValueAsLong, hasCurrentToken, hasToken, hasTokenId, isExpectedStartArrayToken, isExpectedStartObjectToken, nextValue, skipChildren
canParseAsync, canReadObjectId, canReadTypeId, canUseSchema, configure, currentName, getBinaryValue, getBooleanValue, getByteValue, getEmbeddedObject, getFeatureMask, getFormatFeatures, getNonBlockingInputFeeder, getObjectId, getSchema, getShortValue, getTypeId, getValueAsBoolean, getValueAsDouble, isEnabled, isEnabled, overrideFormatFeatures, readBinaryValue, readValueAs, readValueAs, readValueAsTree, readValuesAs, readValuesAs, releaseBuffered, requiresCustomCodec, setRequestPayloadOnError, setRequestPayloadOnError, setRequestPayloadOnError, setSchema
public ReaderBasedJsonParser(IOContext ctxt, int features, java.io.Reader r, ObjectCodec codec, CharsToNameCanonicalizer st, char[] inputBuffer, int start, int end, boolean bufferRecyclable)
public ReaderBasedJsonParser(IOContext ctxt, int features, java.io.Reader r, ObjectCodec codec, CharsToNameCanonicalizer st)
Reader
, and buffer allocation
can be done using default mechanism.public ObjectCodec getCodec()
JsonParser
ObjectCodec
associated with this
parser, if any. Codec is used by JsonParser.readValueAs(Class)
method (and its variants).getCodec
in class JsonParser
public void setCodec(ObjectCodec c)
JsonParser
ObjectCodec
associated with this
parser, if any. Codec is used by JsonParser.readValueAs(Class)
method (and its variants).setCodec
in class JsonParser
public int releaseBuffered(java.io.Writer w) throws java.io.IOException
JsonParser
releaseBuffered
in class JsonParser
Writer
;
otherwise number of chars released (0 if there was nothing to release)java.io.IOException
- if write using Writer threw exceptionpublic java.lang.Object getInputSource()
JsonParser
InputStream
or Reader
, depending on what
parser was constructed with.
Note that returned value may be null in some cases; including
case where parser implementation does not want to exposed raw
source to caller.
In cases where input has been decorated, object returned here
is the decorated version; this allows some level of interaction
between users of parser and decorator object.
In general use of this accessor should be considered as "last effort", i.e. only used if no other mechanism is applicable.
getInputSource
in class JsonParser
public final java.lang.String getText() throws java.io.IOException
nextToken()
, or
after encountering end-of-input), returns null.
Method can be called for any event.getText
in class ParserMinimalBase
java.io.IOException
public int getText(java.io.Writer writer) throws java.io.IOException
JsonParser
writer.write(parser.getText());but should typically be more efficient as longer content does need to be combined into a single
String
to return, and write
can occur directly from intermediate buffers Jackson uses.getText
in class JsonParser
java.io.IOException
public final java.lang.String getValueAsString() throws java.io.IOException
JsonParser
String
.
JSON Strings map naturally; scalar values get converted to
their textual representation.
If representation can not be converted to a String value (including structured types
like Objects and Arrays and null token), default value of
null will be returned; no exceptions are thrown.getValueAsString
in class ParserMinimalBase
java.io.IOException
public final java.lang.String getValueAsString(java.lang.String defValue) throws java.io.IOException
JsonParser
String
.
JSON Strings map naturally; scalar values get converted to
their textual representation.
If representation can not be converted to a String value (including structured types
like Objects and Arrays and null token), specified default value
will be returned; no exceptions are thrown.getValueAsString
in class ParserMinimalBase
java.io.IOException
public final char[] getTextCharacters() throws java.io.IOException
JsonParser
JsonParser.getText()
, but that will return
underlying (unmodifiable) character array that contains
textual value, instead of constructing a String object
to contain this information.
Note, however, that:
JsonParser.getTextOffset()
) to
know the actual offset
JsonParser.getTextLength()
for actual length of returned content.
Note that caller MUST NOT modify the returned character array in any way -- doing so may corrupt current parser state and render parser instance useless.
The only reason to call this method (over JsonParser.getText()
)
is to avoid construction of a String object (which
will make a copy of contents).
getTextCharacters
in class ParserMinimalBase
java.io.IOException
public final int getTextLength() throws java.io.IOException
JsonParser
JsonParser.getTextCharacters()
, to know length
of String stored in returned buffer.getTextLength
in class ParserMinimalBase
JsonParser.getTextCharacters()
that are part of
textual content of the current token.java.io.IOException
public final int getTextOffset() throws java.io.IOException
JsonParser
JsonParser.getTextCharacters()
, to know offset
of the first text content character within buffer.getTextOffset
in class ParserMinimalBase
JsonParser.getTextCharacters()
that is part of
textual content of the current token.java.io.IOException
public byte[] getBinaryValue(Base64Variant b64variant) throws java.io.IOException
JsonParser
JsonParser.getText()
and decoding result (except for decoding part),
but should be significantly more performant.
Note that non-decoded textual contents of the current token are not guaranteed to be accessible after this method is called. Current implementation, for example, clears up textual content during decoding. Decoded binary content, however, will be retained until parser is advanced to the next event.
getBinaryValue
in class ParserBase
b64variant
- Expected variant of base64 encoded
content (see Base64Variants
for definitions
of "standard" variants).java.io.IOException
public int readBinaryValue(Base64Variant b64variant, java.io.OutputStream out) throws java.io.IOException
JsonParser
JsonParser.readBinaryValue(OutputStream)
but allows explicitly
specifying base64 variant to use.readBinaryValue
in class JsonParser
b64variant
- base64 variant to useout
- Output stream to use for passing decoded binary dataOutputStream
java.io.IOException
public final JsonToken nextToken() throws java.io.IOException
JsonParser
nextToken
in class ParserMinimalBase
java.io.IOException
public void finishToken() throws java.io.IOException
JsonParser
JsonParser.getTextCharacters()
, would
achieve).
Note that for many dataformat implementations this method will not do anything; this is the default implementation unless overridden by sub-classes.
finishToken
in class JsonParser
java.io.IOException
public boolean nextFieldName(SerializableString sstr) throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
verifies whether it is JsonToken.FIELD_NAME
with specified name
and returns result of that comparison.
It is functionally equivalent to:
return (nextToken() == JsonToken.FIELD_NAME) && str.getValue().equals(getCurrentName());but may be faster for parser to verify, and can therefore be used if caller expects to get such a property name from input next.
nextFieldName
in class JsonParser
sstr
- Property name to compare next token to (if next token is
JsonToken.FIELD_NAME
)java.io.IOException
public java.lang.String nextFieldName() throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
verifies whether it is JsonToken.FIELD_NAME
; if it is,
returns same as JsonParser.getCurrentName()
, otherwise null.nextFieldName
in class JsonParser
java.io.IOException
public final java.lang.String nextTextValue() throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
if it is JsonToken.VALUE_STRING
returns contained String value;
otherwise returns null.
It is functionally equivalent to:
return (nextToken() == JsonToken.VALUE_STRING) ? getText() : null;but may be faster for parser to process, and can therefore be used if caller expects to get a String value next from input.
nextTextValue
in class JsonParser
java.io.IOException
public final int nextIntValue(int defaultValue) throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
if it is JsonToken.VALUE_NUMBER_INT
returns 32-bit int value;
otherwise returns specified default value
It is functionally equivalent to:
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getIntValue() : defaultValue;but may be faster for parser to process, and can therefore be used if caller expects to get an int value next from input.
nextIntValue
in class JsonParser
java.io.IOException
public final long nextLongValue(long defaultValue) throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
if it is JsonToken.VALUE_NUMBER_INT
returns 64-bit long value;
otherwise returns specified default value
It is functionally equivalent to:
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getLongValue() : defaultValue;but may be faster for parser to process, and can therefore be used if caller expects to get a long value next from input.
nextLongValue
in class JsonParser
java.io.IOException
public final java.lang.Boolean nextBooleanValue() throws java.io.IOException
JsonParser
JsonParser.nextToken()
) and
if it is JsonToken.VALUE_TRUE
or JsonToken.VALUE_FALSE
returns matching Boolean value; otherwise return null.
It is functionally equivalent to:
JsonToken t = nextToken(); if (t == JsonToken.VALUE_TRUE) return Boolean.TRUE; if (t == JsonToken.VALUE_FALSE) return Boolean.FALSE; return null;but may be faster for parser to process, and can therefore be used if caller expects to get a Boolean value next from input.
nextBooleanValue
in class JsonParser
java.io.IOException
public JsonLocation getTokenLocation()
ParserBase
getTokenLocation
in class ParserBase
public JsonLocation getCurrentLocation()
ParserBase
getCurrentLocation
in class ParserBase
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