UTF8DataInputJsonParser (The Adobe AEM Quickstart and Web Application.)

java.lang.Object
- com.fasterxml.jackson.core.JsonParser
- - com.fasterxml.jackson.core.base.ParserMinimalBase
  - - com.fasterxml.jackson.core.base.ParserBase
    - - com.fasterxml.jackson.core.json.UTF8DataInputJsonParser

All Implemented Interfaces:

Versioned, java.io.Closeable, java.lang.AutoCloseable
```
public class UTF8DataInputJsonParser
extends ParserBase
```
This is a concrete implementation of JsonParser, which is based on a DataInput as the input source.
Due to limitations in look-ahead (basically there's none), as well as overhead of reading content mostly byte-by-byte, there are some minor differences from regular streaming parsing. Specifically:
- Input location offsets not being tracked, as offsets would need to be updated for each read from all over the place. If caller wants this information, it has to track this with DataInput. This also affects column number, so the only location information available is the row (line) number (but even that is approximate in case of two-byte linefeeds -- it should work with single CR or LF tho)
- No white space validation: checks are simplified NOT to check for control characters.
Since:

2.8

Nested Class Summary
- Nested classes/interfaces inherited from class com.fasterxml.jackson.core.JsonParser
  JsonParser.Feature, JsonParser.NumberType

Constructor Summary

Constructors
Constructor and Description
`UTF8DataInputJsonParser(IOContext ctxt, int features, java.io.DataInput inputData, ObjectCodec codec, ByteQuadsCanonicalizer sym, int firstByte)`

Method Summary

All Methods Instance Methods Concrete Methods
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.
`JacksonFeatureSet<StreamReadCapability>`	`getReadCapabilities()` Accessor for getting metadata on capabilities of this parser, based on underlying data format being read (directly or indirectly).
`java.lang.String`	`getText()` Method for accessing textual representation of the current token; if no current token (before first call to `JsonParser.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.
`int`	`getValueAsInt()` Method that will try to convert value of current token to a Java `int` value.
`int`	`getValueAsInt(int defValue)` Method that will try to convert value of current token to a int.
`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.
`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.OutputStream out)` 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.

Methods inherited from class com.fasterxml.jackson.core.base.ParserBase
_getByteArrayBuilder, close, disable, enable, getBigIntegerValue, getCurrentName, getCurrentValue, getDecimalValue, getDoubleValue, getFloatValue, getIntValue, getLongValue, getNumberType, getNumberValue, getNumberValueExact, getParsingContext, getTokenCharacterOffset, getTokenColumnNr, getTokenLineNr, hasTextCharacters, isClosed, isNaN, overrideCurrentName, overrideStdFeatures, setCurrentValue, setFeatureMask, version

Methods inherited from class com.fasterxml.jackson.core.base.ParserMinimalBase
clearCurrentToken, currentToken, currentTokenId, getCurrentToken, getCurrentTokenId, getLastClearedToken, getValueAsBoolean, getValueAsDouble, getValueAsLong, getValueAsLong, hasCurrentToken, hasToken, hasTokenId, isExpectedNumberIntToken, isExpectedStartArrayToken, isExpectedStartObjectToken, nextValue, skipChildren

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - UTF8DataInputJsonParser
```
public UTF8DataInputJsonParser(IOContext ctxt,
                               int features,
                               java.io.DataInput inputData,
                               ObjectCodec codec,
                               ByteQuadsCanonicalizer sym,
                               int firstByte)
```
- Method Detail
  - getCodec
```
public ObjectCodec getCodec()
```
    Description copied from class: JsonParser
    
    Accessor for ObjectCodec associated with this parser, if any. Codec is used by JsonParser.readValueAs(Class) method (and its variants).
    
    Specified by:
    
    getCodec in class JsonParser
    
    Returns:
    
    Codec assigned to this parser, if any; null if none
  - setCodec
```
public void setCodec(ObjectCodec c)
```
    Description copied from class: JsonParser
    
    Setter that allows defining ObjectCodec associated with this parser, if any. Codec is used by JsonParser.readValueAs(Class) method (and its variants).
    
    Specified by:
    
    setCodec in class JsonParser
    
    Parameters:
    
    c - Codec to assign, if any; null if none
  - getReadCapabilities
```
public JacksonFeatureSet<StreamReadCapability> getReadCapabilities()
```
    Description copied from class: JsonParser
    
    Accessor for getting metadata on capabilities of this parser, based on underlying data format being read (directly or indirectly).
    
    Overrides:
    
    getReadCapabilities in class JsonParser
    
    Returns:
    
    Set of read capabilities for content to read via this parser
  - releaseBuffered
```
public int releaseBuffered(java.io.OutputStream out)
                    throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method that can be called to push back any content that has been read but not consumed by the parser. This is usually done after reading all content of interest using parser. Content is released by writing it to given stream if possible; if underlying input is byte-based it can released, if not (char-based) it can not.
    
    Overrides:
    
    releaseBuffered in class JsonParser
    
    Parameters:
    
    out - OutputStream to which buffered, undecoded content is written to
    
    Returns:
    
    -1 if the underlying content source is not byte based (that is, input can not be sent to OutputStream; otherwise number of bytes released (0 if there was nothing to release)
    
    Throws:
    
    java.io.IOException - if write to stream threw exception
  - getInputSource
```
public java.lang.Object getInputSource()
```
    Description copied from class: JsonParser
    
    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. 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.
    
    Overrides:
    
    getInputSource in class JsonParser
    
    Returns:
    
    Input source this parser was configured with
  - getText
```
public java.lang.String getText()
                         throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method for accessing textual representation of the current token; if no current token (before first call to JsonParser.nextToken(), or after encountering end-of-input), returns null. Method can be called for any token type.
    
    Specified by:
    
    getText in class ParserMinimalBase
    
    Returns:
    
    Textual value associated with the current token (one returned by JsonParser.nextToken() or other iteration methods)
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getText
```
public int getText(java.io.Writer writer)
            throws java.io.IOException
```
    Description copied from class: JsonParser
    Method to read the textual representation of the current token in chunks and pass it to the given Writer. Conceptually same as calling:
```
  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.
    Overrides:
    
    getText in class JsonParser
    
    Parameters:
    
    writer - Writer to write textual content to
    
    Returns:
    
    The number of characters written to the Writer
    
    Throws:
    
    java.io.IOException - for low-level read issues or writes using passed writer, or JsonParseException for decoding problems
  - getValueAsString
```
public java.lang.String getValueAsString()
                                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method that will try to convert value of current token to a 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.
    
    Overrides:
    
    getValueAsString in class ParserMinimalBase
    
    Returns:
    
    String value current token is converted to, if possible; null otherwise
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getValueAsString
```
public java.lang.String getValueAsString(java.lang.String defValue)
                                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method that will try to convert value of current token to a 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.
    
    Overrides:
    
    getValueAsString in class ParserMinimalBase
    
    Parameters:
    
    defValue - Default value to return if conversion to String is not possible
    
    Returns:
    
    String value current token is converted to, if possible; def otherwise
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getValueAsInt
```
public int getValueAsInt()
                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method that will try to convert value of current token to a Java int value. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.
    If representation can not be converted to an int (including structured type markers like start/end Object/Array) default value of 0 will be returned; no exceptions are thrown.
    
    Overrides:
    
    getValueAsInt in class ParserMinimalBase
    
    Returns:
    
    int value current token is converted to, if possible; exception thrown otherwise
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getValueAsInt
```
public int getValueAsInt(int defValue)
                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Method that will try to convert value of current token to a int. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.
    If representation can not be converted to an int (including structured type markers like start/end Object/Array) specified def will be returned; no exceptions are thrown.
    
    Overrides:
    
    getValueAsInt in class ParserMinimalBase
    
    Parameters:
    
    defValue - Default value to return if conversion to int is not possible
    
    Returns:
    
    int value current token is converted to, if possible; def otherwise
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getTextCharacters
```
public char[] getTextCharacters()
                         throws java.io.IOException
```
    Description copied from class: JsonParser
    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. Note, however, that:
    - Textual contents are not guaranteed to start at index 0 (rather, call JsonParser.getTextOffset()) to know the actual offset
    - Length of textual contents may be less than the length of returned buffer: call 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).
    Specified by:
    
    getTextCharacters in class ParserMinimalBase
    
    Returns:
    
    Buffer that contains the current textual value (but not necessarily at offset 0, and not necessarily until the end of buffer)
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getTextLength
```
public int getTextLength()
                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Accessor used with JsonParser.getTextCharacters(), to know length of String stored in returned buffer.
    
    Specified by:
    
    getTextLength in class ParserMinimalBase
    
    Returns:
    
    Number of characters within buffer returned by JsonParser.getTextCharacters() that are part of textual content of the current token.
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getTextOffset
```
public int getTextOffset()
                  throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Accessor used with JsonParser.getTextCharacters(), to know offset of the first text content character within buffer.
    
    Specified by:
    
    getTextOffset in class ParserMinimalBase
    
    Returns:
    
    Offset of the first character within buffer returned by JsonParser.getTextCharacters() that is part of textual content of the current token.
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getBinaryValue
```
public byte[] getBinaryValue(Base64Variant b64variant)
                      throws java.io.IOException
```
    Description copied from class: JsonParser
    
    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. It works similar to getting String value via 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.
    
    Overrides:
    
    getBinaryValue in class ParserBase
    
    Parameters:
    
    b64variant - Expected variant of base64 encoded content (see Base64Variants for definitions of "standard" variants).
    
    Returns:
    
    Decoded binary data
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - readBinaryValue
```
public int readBinaryValue(Base64Variant b64variant,
                           java.io.OutputStream out)
                    throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Similar to JsonParser.readBinaryValue(OutputStream) but allows explicitly specifying base64 variant to use.
    
    Overrides:
    
    readBinaryValue in class JsonParser
    
    Parameters:
    
    b64variant - base64 variant to use
    
    out - Output stream to use for passing decoded binary data
    
    Returns:
    
    Number of bytes that were decoded and written via OutputStream
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - nextToken
```
public JsonToken nextToken()
                    throws java.io.IOException
```
    Description copied from class: JsonParser
    
    Main iteration method, which will advance stream enough to determine type of the next token, if any. If none remaining (stream has no content other than possible white space before ending), null will be returned.
    
    Specified by:
    
    nextToken in class ParserMinimalBase
    
    Returns:
    
    Next token from the stream, if any found, or null to indicate end-of-input
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - finishToken
```
public void finishToken()
                 throws java.io.IOException
```
    Description copied from class: JsonParser
    
    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. This is usually used to ensure that the token end location is available, as well as token contents (similar to what calling, say 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.
    
    Overrides:
    
    finishToken in class JsonParser
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - nextFieldName
```
public java.lang.String nextFieldName()
                               throws java.io.IOException
```
    Description copied from class: JsonParser
    
    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.
    
    Overrides:
    
    nextFieldName in class JsonParser
    
    Returns:
    
    Name of the the JsonToken.FIELD_NAME parser advanced to, if any; null if next token is of some other type
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - nextTextValue
```
public java.lang.String nextTextValue()
                               throws java.io.IOException
```
    Description copied from class: JsonParser
    Method that fetches next token (as if calling 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.
    Overrides:
    
    nextTextValue in class JsonParser
    
    Returns:
    
    Text value of the JsonToken.VALUE_STRING token parser advanced to; or null if next token is of some other type
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - nextIntValue
```
public int nextIntValue(int defaultValue)
                 throws java.io.IOException
```
    Description copied from class: JsonParser
    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:
```
  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.
    NOTE: value checks are performed similar to JsonParser.getIntValue()
    Overrides:
    
    nextIntValue in class JsonParser
    
    Parameters:
    
    defaultValue - Value to return if next token is NOT of type JsonToken.VALUE_NUMBER_INT
    
    Returns:
    
    Integer (int) value of the JsonToken.VALUE_NUMBER_INT token parser advanced to; or defaultValue if next token is of some other type
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
    
    InputCoercionException - if integer number does not fit in Java int
  - nextLongValue
```
public long nextLongValue(long defaultValue)
                   throws java.io.IOException
```
    Description copied from class: JsonParser
    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:
```
  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.
    NOTE: value checks are performed similar to JsonParser.getLongValue()
    Overrides:
    
    nextLongValue in class JsonParser
    
    Parameters:
    
    defaultValue - Value to return if next token is NOT of type JsonToken.VALUE_NUMBER_INT
    
    Returns:
    
    long value of the JsonToken.VALUE_NUMBER_INT token parser advanced to; or defaultValue if next token is of some other type
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
    
    InputCoercionException - if integer number does not fit in Java long
  - nextBooleanValue
```
public java.lang.Boolean nextBooleanValue()
                                   throws java.io.IOException
```
    Description copied from class: JsonParser
    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. 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.
    Overrides:
    
    nextBooleanValue in class JsonParser
    
    Returns:
    
    Boolean value of the JsonToken.VALUE_TRUE or JsonToken.VALUE_FALSE token parser advanced to; or null if next token is of some other type
    
    Throws:
    
    java.io.IOException - for low-level read issues, or JsonParseException for decoding problems
  - getTokenLocation
```
public JsonLocation getTokenLocation()
```
    Description copied from class: ParserBase
    
    Method that return the starting location of the current token; that is, position of the first character from input that starts the current token.
    
    Overrides:
    
    getTokenLocation in class ParserBase
    
    Returns:
    
    Starting location of the token parser currently points to
  - getCurrentLocation
```
public JsonLocation getCurrentLocation()
```
    Description copied from class: ParserBase
    
    Method that returns location of the last processed character; usually for error reporting purposes
    
    Overrides:
    
    getCurrentLocation in class ParserBase
    
    Returns:
    
    Location of the last processed input unit (byte or character)

Class UTF8DataInputJsonParser

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.core.JsonParser

Constructor Summary

Method Summary

Methods inherited from class com.fasterxml.jackson.core.base.ParserBase

Methods inherited from class com.fasterxml.jackson.core.base.ParserMinimalBase

Methods inherited from class com.fasterxml.jackson.core.JsonParser

Methods inherited from class java.lang.Object

Constructor Detail

UTF8DataInputJsonParser

Method Detail

getCodec

setCodec

getReadCapabilities

releaseBuffered

getInputSource

getText

getText

getValueAsString

getValueAsString

getValueAsInt

getValueAsInt

getTextCharacters

getTextLength

getTextOffset

getBinaryValue

readBinaryValue

nextToken

finishToken

nextFieldName

nextTextValue

nextIntValue

nextLongValue

nextBooleanValue

getTokenLocation

getCurrentLocation