Package com.fasterxml.jackson.dataformat.csv.impl

Class CsvParserBootstrapper

java.lang.Object

com.fasterxml.jackson.dataformat.csv.impl.CsvParserBootstrapper

public final class CsvParserBootstrapper
extends java.lang.Object

This class is used to determine the encoding of byte stream that is to contain CSV document. Since there is no real specification for how this should work with CSV, it will be based on rules used with JSON (which themselves are similar to those used with XML); main points are to check for BOM first, then look for multi-byted fixed-length encodings (UTF-16, UTF-32). And finally, if neither found, must decide between most likely alternatives, UTF-8 and Latin-1.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	_bigEndian
protected int	_bytesPerChar
protected com.fasterxml.jackson.core.ObjectCodec	_codec
protected com.fasterxml.jackson.core.io.IOContext	_context
protected java.io.InputStream	_in
protected byte[]	_inputBuffer
private int	_inputEnd
protected int	_inputProcessed	Current number of input units (bytes or chars) that were processed in previous blocks, before contents of current input buffer.
private int	_inputPtr
(package private) static byte	UTF8_BOM_1
(package private) static byte	UTF8_BOM_2
(package private) static byte	UTF8_BOM_3

Constructor Summary

Constructors

Constructor	Description
CsvParserBootstrapper(com.fasterxml.jackson.core.io.IOContext ctxt, com.fasterxml.jackson.core.ObjectCodec codec, byte[] inputBuffer, int inputStart, int inputLen)
CsvParserBootstrapper(com.fasterxml.jackson.core.io.IOContext ctxt, com.fasterxml.jackson.core.ObjectCodec codec, java.io.InputStream in)

Method Summary

Modifier and Type	Method	Description
private java.io.Reader	_createReader(com.fasterxml.jackson.core.JsonEncoding enc, boolean autoClose)
private boolean	checkUTF16(int i16)
private boolean	checkUTF32(int quad)
CsvParser	constructParser(int baseFeatures, int csvFeatures)
protected boolean	ensureLoaded(int minimum)
private boolean	handleBOM(int quad)
static com.fasterxml.jackson.core.format.MatchStrength	hasCSVFormat(com.fasterxml.jackson.core.format.InputAccessor acc, int quoteChar, char separatorChar)	Current implementation is not as thorough as one used by other data formats like JSON.
private void	reportWeirdUCS4(java.lang.String type)
private static int	skipSpace(com.fasterxml.jackson.core.format.InputAccessor acc, byte b)

Methods inherited from class java.lang.Object

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

Field Detail

UTF8_BOM_1

static final byte UTF8_BOM_1

See Also:

Constant Field Values

UTF8_BOM_2

static final byte UTF8_BOM_2

See Also:

Constant Field Values

UTF8_BOM_3

static final byte UTF8_BOM_3

See Also:

Constant Field Values

_context

protected final com.fasterxml.jackson.core.io.IOContext _context

_codec

protected final com.fasterxml.jackson.core.ObjectCodec _codec

_in

protected final java.io.InputStream _in

_inputBuffer

protected final byte[] _inputBuffer

_inputPtr

private int _inputPtr

_inputEnd

private int _inputEnd

_inputProcessed

protected int _inputProcessed

Current number of input units (bytes or chars) that were processed in previous blocks, before contents of current input buffer.

Note: includes possible BOMs, if those were part of the input.

_bigEndian

protected boolean _bigEndian

_bytesPerChar

protected int _bytesPerChar

Constructor Detail

CsvParserBootstrapper

public CsvParserBootstrapper(com.fasterxml.jackson.core.io.IOContext ctxt,
                             com.fasterxml.jackson.core.ObjectCodec codec,
                             java.io.InputStream in)

CsvParserBootstrapper

public CsvParserBootstrapper(com.fasterxml.jackson.core.io.IOContext ctxt,
                             com.fasterxml.jackson.core.ObjectCodec codec,
                             byte[] inputBuffer,
                             int inputStart,
                             int inputLen)

Method Detail

constructParser

public CsvParser constructParser(int baseFeatures,
                                 int csvFeatures)
                          throws java.io.IOException

Throws:

java.io.IOException

_createReader

private java.io.Reader _createReader(com.fasterxml.jackson.core.JsonEncoding enc,
                                     boolean autoClose)
                              throws java.io.IOException

Throws:

java.io.IOException

hasCSVFormat

public static com.fasterxml.jackson.core.format.MatchStrength hasCSVFormat(com.fasterxml.jackson.core.format.InputAccessor acc,
                                                                           int quoteChar,
                                                                           char separatorChar)
                                                                    throws java.io.IOException

Current implementation is not as thorough as one used by other data formats like JSON. But it should work, for now, and can be improved as necessary.

Throws:

java.io.IOException

skipSpace

private static final int skipSpace(com.fasterxml.jackson.core.format.InputAccessor acc,
                                   byte b)
                            throws java.io.IOException

Throws:

java.io.IOException

handleBOM

private boolean handleBOM(int quad)
                   throws java.io.IOException

Returns:

True if a BOM was successfully found, and encoding thereby recognized.

Throws:

java.io.IOException

checkUTF32

private boolean checkUTF32(int quad)
                    throws java.io.IOException

Throws:

java.io.IOException

checkUTF16

private boolean checkUTF16(int i16)

reportWeirdUCS4

private void reportWeirdUCS4(java.lang.String type)
                      throws java.io.IOException

Throws:

java.io.IOException

ensureLoaded

protected boolean ensureLoaded(int minimum)
                        throws java.io.IOException

Throws:

java.io.IOException