org.codehaus.jackson.impl
Class ReaderBasedNumericParser

java.lang.Object
  org.codehaus.jackson.JsonParser
      org.codehaus.jackson.impl.ReaderBasedParserBase
          org.codehaus.jackson.impl.ReaderBasedNumericParser

Direct Known Subclasses:

ReaderBasedParser

public abstract class ReaderBasedNumericParser
extends ReaderBasedParserBase

Intermediate class that implements handling of numeric parsing. Separate from the actual parser class just to isolate numeric parsing: would be nice to use aggregation, but unfortunately many parts are hard to implement without direct access to underlying buffers.

Nested Class Summary

Nested classes/interfaces inherited from class org.codehaus.jackson.JsonParser

JsonParser.NumberType

Field Summary

protected static char	CHAR_NULL
protected static int	INT_0
protected static int	INT_1
protected static int	INT_2
protected static int	INT_3
protected static int	INT_4
protected static int	INT_5
protected static int	INT_6
protected static int	INT_7
protected static int	INT_8
protected static int	INT_9
protected static int	INT_DECIMAL_POINT
protected static int	INT_e
protected static int	INT_E
protected static int	INT_MINUS
protected static int	INT_PLUS
protected int	mExpLength Length of the exponent part of the number, if any, not including 'e' marker or sign, just digits.
protected int	mFractLength Length of the fractional part (not including decimal point or exponent), in characters.
protected int	mIntLength Length of integer part of the number, in characters
protected BigDecimal	mNumberBigDecimal
protected BigInteger	mNumberBigInt
protected double	mNumberDouble
protected int	mNumberInt
protected long	mNumberLong
protected boolean	mNumberNegative Flag that indicates whether numeric value has a negative value.
protected int	mNumTypesValid Bitfield that indicates which numeric representations have been calculated for the current type
protected static int	NR_BIGDECIMAL
protected static int	NR_BIGINT
protected static int	NR_DOUBLE
protected static int	NR_INT
protected static int	NR_LONG

Fields inherited from class org.codehaus.jackson.impl.ReaderBasedParserBase

mCurrInputProcessed, mCurrInputRow, mCurrInputRowStart, mCurrToken, mInputBuffer, mInputLen, mInputPtr, mIOContext, mReader, mTextBuffer, mTokenInputCol, mTokenInputRow, mTokenInputTotal

Constructor Summary

ReaderBasedNumericParser(IOContext pc, Reader r)

Method Summary

protected void	convertNumberToBigDecimal()
protected void	convertNumberToDouble()
protected void	convertNumberToInt()
protected void	convertNumberToLong()
abstract String	getText() Method for accessing textual representation of the current event; if no current event (before first call to JsonParser.nextToken(), or after encountering end-of-input), returns null.
protected JsonToken	parseNumberText(int ch) Initial parsing method for number values.
protected void	parseNumericValue() Method that will parse actual numeric value out of a syntactically valid number value.
protected void	reportInvalidNumber(String msg)
protected void	reportOverflowInt()
protected void	reportOverflowLong()
protected void	reportUnexpectedNumberChar(int ch, String comment)

Methods inherited from class org.codehaus.jackson.impl.ReaderBasedParserBase

closeReader, getCharDesc, getCurrentLocation, getNextChar, getTokenCharacterOffset, getTokenColumnNr, getTokenLineNr, loadMore, markLF, markLF, releaseBuffers, reportError, reportInvalidEOF, reportUnexpectedChar, skipCR, skipLF, throwInternal, wrapError

Methods inherited from class org.codehaus.jackson.JsonParser

close, getCurrentName, getCurrentToken, getDecimalValue, getDoubleValue, getIntValue, getLongValue, getNumberType, getNumberValue, getParsingContext, getTextCharacters, getTextLength, getTextOffset, getTokenLocation, hasCurrentToken, nextToken

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NR_INT

protected static final int NR_INT

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Constant Field Values

NR_LONG

protected static final int NR_LONG

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Constant Field Values

NR_BIGINT

protected static final int NR_BIGINT

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Constant Field Values

NR_DOUBLE

protected static final int NR_DOUBLE

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Constant Field Values

NR_BIGDECIMAL

protected static final int NR_BIGDECIMAL

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Constant Field Values

INT_0

protected static final int INT_0

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Constant Field Values

INT_1

protected static final int INT_1

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Constant Field Values

INT_2

protected static final int INT_2

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Constant Field Values

INT_3

protected static final int INT_3

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Constant Field Values

INT_4

protected static final int INT_4

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Constant Field Values

INT_5

protected static final int INT_5

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Constant Field Values

INT_6

protected static final int INT_6

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Constant Field Values

INT_7

protected static final int INT_7

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Constant Field Values

INT_8

protected static final int INT_8

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Constant Field Values

INT_9

protected static final int INT_9

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Constant Field Values

INT_MINUS

protected static final int INT_MINUS

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Constant Field Values

INT_PLUS

protected static final int INT_PLUS

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Constant Field Values

INT_DECIMAL_POINT

protected static final int INT_DECIMAL_POINT

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Constant Field Values

INT_e

protected static final int INT_e

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Constant Field Values

INT_E

protected static final int INT_E

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Constant Field Values

CHAR_NULL

protected static final char CHAR_NULL

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Constant Field Values

mNumTypesValid

protected int mNumTypesValid

Bitfield that indicates which numeric representations have been calculated for the current type

mNumberInt

protected int mNumberInt

mNumberLong

protected long mNumberLong

mNumberDouble

protected double mNumberDouble

mNumberBigInt

protected BigInteger mNumberBigInt

mNumberBigDecimal

protected BigDecimal mNumberBigDecimal

mNumberNegative

protected boolean mNumberNegative

Flag that indicates whether numeric value has a negative value. That is, whether its textual representation starts with minus character.

mIntLength

protected int mIntLength

Length of integer part of the number, in characters

mFractLength

protected int mFractLength

Length of the fractional part (not including decimal point or exponent), in characters. Not used for pure integer values.

mExpLength

protected int mExpLength

Length of the exponent part of the number, if any, not including 'e' marker or sign, just digits. Not used for pure integer values.

Constructor Detail

ReaderBasedNumericParser

public ReaderBasedNumericParser(IOContext pc,
                                Reader r)

Method Detail

getText

public abstract String getText()
                        throws IOException,
                               JsonParseException

Description copied from class: JsonParser

Method for accessing textual representation of the current event; if no current event (before first call to JsonParser.nextToken(), or after encountering end-of-input), returns null. Method can be called for any event.

Specified by:

getText in class JsonParser

Throws:

IOException

JsonParseException

parseNumberText

protected final JsonToken parseNumberText(int ch)
                                   throws IOException,
                                          JsonParseException

Initial parsing method for number values. It needs to be able to parse enough input to be able to determine whether the value is to be considered a simple integer value, or a more generic decimal value: latter of which needs to be expressed as a floating point number. The basic rule is that if the number has no fractional or exponential part, it is an integer; otherwise a floating point number.

Because much of input has to be processed in any case, no partial parsing is done: all input text will be stored for further processing. However, actual numeric value conversion will be deferred, since it is usually the most complicated and costliest part of processing.

Throws:

IOException

JsonParseException

parseNumericValue

protected final void parseNumericValue()
                                throws JsonParseException

Method that will parse actual numeric value out of a syntactically valid number value. Type it will parse into depends on whether it is a floating point number, as well as its magnitude: smallest legal type (of ones available) is used for efficiency.

Throws:

JsonParseException

convertNumberToInt

protected void convertNumberToInt()
                           throws IOException,
                                  JsonParseException

Throws:

IOException

JsonParseException

convertNumberToLong

protected void convertNumberToLong()
                            throws IOException,
                                   JsonParseException

Throws:

IOException

JsonParseException

convertNumberToDouble

protected void convertNumberToDouble()
                              throws IOException,
                                     JsonParseException

Throws:

IOException

JsonParseException

convertNumberToBigDecimal

protected void convertNumberToBigDecimal()
                                  throws IOException,
                                         JsonParseException

Throws:

IOException

JsonParseException

reportUnexpectedNumberChar

protected void reportUnexpectedNumberChar(int ch,
                                          String comment)
                                   throws JsonParseException

Throws:

JsonParseException

reportInvalidNumber

protected void reportInvalidNumber(String msg)
                            throws JsonParseException

Throws:

JsonParseException

reportOverflowInt

protected void reportOverflowInt()
                          throws IOException,
                                 JsonParseException

Throws:

IOException

JsonParseException

reportOverflowLong

protected void reportOverflowLong()
                           throws IOException,
                                  JsonParseException

Throws:

IOException

JsonParseException