de.undercouch.bson4jackson

Class BsonGenerator

java.lang.Object

com.fasterxml.jackson.core.JsonGenerator

com.fasterxml.jackson.core.base.GeneratorBase

de.undercouch.bson4jackson.BsonGenerator

All Implemented Interfaces:

com.fasterxml.jackson.core.Versioned, java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class BsonGenerator
extends com.fasterxml.jackson.core.base.GeneratorBase

Writes BSON code to the provided output stream

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	BsonGenerator.DocumentInfo A structure describing the document currently being generated
static class	BsonGenerator.Feature Defines toggable features

Field Summary

Fields

Modifier and Type	Field and Description
protected int	_bsonFeatures Bit flag composed of bits that indicate which BsonGenerator.Features are enabled.
protected DynamicOutputBuffer	_buffer Since a BSON document's header must include the size of the whole document in bytes, we have to buffer the whole document first, before we can write it to the output stream.
protected com.fasterxml.jackson.core.io.CharacterEscapes	_characterEscapes Custom character escapes to use when writing strings (field names and string values)
protected BsonGenerator.DocumentInfo	_currentDocument Saves information about documents (the main document and embedded ones)
protected java.io.OutputStream	_out The output stream to write to
protected int[]	_outputEscapes Escape codes to use when writing strings (only valid of _characterEscapes is not null, see setCharacterEscapes(CharacterEscapes))
protected int	_typeMarker Saves the position of the type marker for the object currently begin written
protected boolean	nextObjectIsEmbeddedInValue Indicates that the next object to be encountered is actually embedded inside a value, and not a complete value itself.

Fields inherited from class com.fasterxml.jackson.core.base.GeneratorBase

_cfgNumbersAsStrings, _closed, _features, _objectCodec, _writeContext, DERIVED_FEATURES_MASK, MAX_BIG_DECIMAL_SCALE, SURR1_FIRST, SURR1_LAST, SURR2_FIRST, SURR2_LAST, WRITE_BINARY, WRITE_BOOLEAN, WRITE_NULL, WRITE_NUMBER, WRITE_RAW, WRITE_STRING

Fields inherited from class com.fasterxml.jackson.core.JsonGenerator

_cfgPrettyPrinter

Constructor Summary

Constructors

Constructor and Description
BsonGenerator(int jsonFeatures, int bsonFeatures, java.io.OutputStream out) Creates a new generator

Method Summary

Methods

Modifier and Type	Method and Description
protected void	_releaseBuffers()
protected void	_verifyValueWrite(java.lang.String typeMsg)
protected void	_writeArrayFieldNameIfNeeded() If the generator is currently processing an array, this method writes the field name of the current element (which is just the position of the element in the array)
protected int	_writeCString(java.lang.String string) Write a BSON cstring structure (a null terminated string)
protected void	_writeFieldName(java.lang.String name)
protected void	_writeStartObject(boolean array) Creates a new embedded document or array
protected int	_writeString(java.lang.String string) Write a BSON string structure (a null terminated string prependend by the length of the string)
void	close()
protected java.lang.String	escapeCharacters(java.lang.String string) Escapes the given string according to _characterEscapes.
protected java.lang.String	flagsToRegexOptions(int flags) Converts a a Java flags word into a BSON options pattern
void	flush()
protected void	flushBuffer() Tries to flush the output buffer if streaming is enabled.
protected int	getAndIncCurrentArrayPos() Retrieves and then increases the current position in the array currently being generated
com.fasterxml.jackson.core.io.CharacterEscapes	getCharacterEscapes()
protected boolean	isArray()
protected boolean	isEnabled(BsonGenerator.Feature f) Checks if a generator feature is enabled
protected void	putHeader(int pos) Writes the BSON document header to the output buffer at the given position.
protected void	reserveHeader() Reserves bytes for the BSON document header
com.fasterxml.jackson.core.JsonGenerator	setCharacterEscapes(com.fasterxml.jackson.core.io.CharacterEscapes esc)
void	writeBinary(com.fasterxml.jackson.core.Base64Variant b64variant, byte[] data, int offset, int len)
void	writeBinary(com.fasterxml.jackson.core.Base64Variant b64variant, byte subType, byte[] data, int offset, int len) Similar to writeBinary(Base64Variant, byte, byte[], int, int), but with the possibility to specify a binary subtype (see BsonConstants).
void	writeBoolean(boolean state)
void	writeDateTime(java.util.Date date) Write a BSON date time
void	writeEndArray()
void	writeEndObject()
protected void	writeEndObjectInternal()
void	writeFieldName(java.lang.String name)
void	writeJavaScript(JavaScript javaScript, com.fasterxml.jackson.databind.SerializerProvider provider) Write a BSON JavaScript object
void	writeNull()
void	writeNumber(java.math.BigDecimal dec)
void	writeNumber(java.math.BigInteger v)
void	writeNumber(double d)
void	writeNumber(float f)
void	writeNumber(int v)
void	writeNumber(long v)
void	writeNumber(java.lang.String encodedValue)
void	writeObjectId(ObjectId objectId) Write a BSON ObjectId
void	writeRaw(char c)
void	writeRaw(char[] text, int offset, int len)
void	writeRaw(java.lang.String text)
void	writeRaw(java.lang.String text, int offset, int len)
void	writeRawUTF8String(byte[] text, int offset, int length)
void	writeRegex(java.util.regex.Pattern pattern) Write a BSON regex
void	writeStartArray()
void	writeStartObject()
void	writeString(char[] text, int offset, int len)
void	writeString(java.lang.String text)
void	writeSymbol(Symbol symbol) Write a BSON Symbol object
void	writeTimestamp(Timestamp timestamp) Write a MongoDB timestamp
void	writeUTF8String(byte[] text, int offset, int length)

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

_asString, _checkStdFeatureChanges, _constructDefaultPrettyPrinter, _decodeSurrogate, disable, enable, getCodec, getCurrentValue, getFeatureMask, getOutputContext, isClosed, isEnabled, overrideStdFeatures, setCodec, setCurrentValue, setFeatureMask, useDefaultPrettyPrinter, version, writeBinary, writeFieldName, writeObject, writeRawValue, writeRawValue, writeRawValue, writeRawValue, writeStartObject, writeString, writeTree

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

_reportError, _reportUnsupportedOperation, _throwInternal, _verifyOffsets, _writeSimpleObject, canOmitFields, canUseSchema, canWriteBinaryNatively, canWriteFormattedNumbers, canWriteObjectId, canWriteTypeId, configure, copyCurrentEvent, copyCurrentStructure, getFormatFeatures, getHighestEscapedChar, getOutputBuffered, getOutputTarget, getPrettyPrinter, getSchema, overrideFormatFeatures, setHighestNonEscapedChar, setPrettyPrinter, setRootValueSeparator, setSchema, writeArray, writeArray, writeArray, writeArrayFieldStart, writeBinary, writeBinary, writeBinary, writeBinaryField, writeBooleanField, writeEmbeddedObject, writeFieldId, writeNullField, writeNumber, writeNumberField, writeNumberField, writeNumberField, writeNumberField, writeNumberField, writeObjectField, writeObjectFieldStart, writeObjectId, writeObjectRef, writeOmittedField, writeRaw, writeStartArray, writeString, writeStringField, writeTypeId, writeTypePrefix, writeTypeSuffix

Methods inherited from class java.lang.Object

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

Field Detail

_bsonFeatures

protected final int _bsonFeatures

Bit flag composed of bits that indicate which BsonGenerator.Features are enabled.

_out

protected final java.io.OutputStream _out

The output stream to write to

_buffer

protected final DynamicOutputBuffer _buffer

Since a BSON document's header must include the size of the whole document in bytes, we have to buffer the whole document first, before we can write it to the output stream. BSON specifies LITTLE_ENDIAN for all tokens.

_typeMarker

protected int _typeMarker

Saves the position of the type marker for the object currently begin written

_currentDocument

protected BsonGenerator.DocumentInfo _currentDocument

Saves information about documents (the main document and embedded ones)

nextObjectIsEmbeddedInValue

protected boolean nextObjectIsEmbeddedInValue

Indicates that the next object to be encountered is actually embedded inside a value, and not a complete value itself. This causes things like context validation and writing out the type to be skipped.

_characterEscapes

protected com.fasterxml.jackson.core.io.CharacterEscapes _characterEscapes

Custom character escapes to use when writing strings (field names and string values)

_outputEscapes

protected int[] _outputEscapes

Escape codes to use when writing strings (only valid of _characterEscapes is not null, see setCharacterEscapes(CharacterEscapes))

Constructor Detail

BsonGenerator

public BsonGenerator(int jsonFeatures,
             int bsonFeatures,
             java.io.OutputStream out)

Creates a new generator

Parameters:

jsonFeatures - bit flag composed of bits that indicate which JsonGenerator.Features are enabled.

bsonFeatures - bit flag composed of bits that indicate which BsonGenerator.Features are enabled.

out - the output stream to write to

Method Detail

setCharacterEscapes

public com.fasterxml.jackson.core.JsonGenerator setCharacterEscapes(com.fasterxml.jackson.core.io.CharacterEscapes esc)

Overrides:

setCharacterEscapes in class com.fasterxml.jackson.core.JsonGenerator

getCharacterEscapes

public com.fasterxml.jackson.core.io.CharacterEscapes getCharacterEscapes()

Overrides:

getCharacterEscapes in class com.fasterxml.jackson.core.JsonGenerator

isEnabled

protected boolean isEnabled(BsonGenerator.Feature f)

Checks if a generator feature is enabled

Parameters:

f - the feature

Returns:

true if the given feature is enabled

isArray

protected boolean isArray()

Returns:

true if the generator is currently processing an array

getAndIncCurrentArrayPos

protected int getAndIncCurrentArrayPos()

Retrieves and then increases the current position in the array currently being generated

Returns:

the position (before it has been increased) or -1 if the current document is not an array

reserveHeader

protected void reserveHeader()

Reserves bytes for the BSON document header

putHeader

protected void putHeader(int pos)

Writes the BSON document header to the output buffer at the given position. Does not increase the buffer's write position.

Parameters:

pos - the position where to write the header

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Specified by:

flush in class com.fasterxml.jackson.core.base.GeneratorBase

Throws:

java.io.IOException

_releaseBuffers

protected void _releaseBuffers()

Specified by:

_releaseBuffers in class com.fasterxml.jackson.core.base.GeneratorBase

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class com.fasterxml.jackson.core.base.GeneratorBase

Throws:

java.io.IOException

writeStartArray

public void writeStartArray()
                     throws java.io.IOException,
                            com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeStartArray in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeEndArray

public void writeEndArray()
                   throws java.io.IOException,
                          com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeEndArray in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeStartObject

public void writeStartObject()
                      throws java.io.IOException,
                             com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeStartObject in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

_writeStartObject

protected void _writeStartObject(boolean array)
                          throws java.io.IOException

Creates a new embedded document or array

Parameters:

array - true if the embedded object is an array

Throws:

java.io.IOException - if the document could not be created

writeEndObject

public void writeEndObject()
                    throws java.io.IOException,
                           com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeEndObject in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeEndObjectInternal

protected void writeEndObjectInternal()

_writeArrayFieldNameIfNeeded

protected void _writeArrayFieldNameIfNeeded()
                                     throws java.io.IOException

If the generator is currently processing an array, this method writes the field name of the current element (which is just the position of the element in the array)

Throws:

java.io.IOException - if the field name could not be written

writeFieldName

public void writeFieldName(java.lang.String name)
                    throws java.io.IOException,
                           com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeFieldName in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

_writeFieldName

protected void _writeFieldName(java.lang.String name)
                        throws java.io.IOException,
                               com.fasterxml.jackson.core.JsonGenerationException

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

_verifyValueWrite

protected void _verifyValueWrite(java.lang.String typeMsg)
                          throws java.io.IOException

Specified by:

_verifyValueWrite in class com.fasterxml.jackson.core.base.GeneratorBase

Throws:

java.io.IOException

flushBuffer

protected void flushBuffer()
                    throws java.io.IOException

Tries to flush the output buffer if streaming is enabled. This method is a no-op if streaming is disabled.

Throws:

java.io.IOException - if flushing failed

writeString

public void writeString(java.lang.String text)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeString in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeString

public void writeString(char[] text,
               int offset,
               int len)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeString in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeRaw

public void writeRaw(java.lang.String text)
              throws java.io.IOException,
                     com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeRaw in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeRaw

public void writeRaw(java.lang.String text,
            int offset,
            int len)
              throws java.io.IOException,
                     com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeRaw in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeRaw

public void writeRaw(char[] text,
            int offset,
            int len)
              throws java.io.IOException,
                     com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeRaw in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeRaw

public void writeRaw(char c)
              throws java.io.IOException,
                     com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeRaw in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeBinary

public void writeBinary(com.fasterxml.jackson.core.Base64Variant b64variant,
               byte[] data,
               int offset,
               int len)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeBinary in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeBinary

public void writeBinary(com.fasterxml.jackson.core.Base64Variant b64variant,
               byte subType,
               byte[] data,
               int offset,
               int len)
                 throws java.io.IOException

Similar to writeBinary(Base64Variant, byte, byte[], int, int), but with the possibility to specify a binary subtype (see BsonConstants).

Parameters:

b64variant - base64 variant to use (will be ignored for BSON)

subType - the binary subtype

data - the binary data to write

offset - the offset of the first byte to write

len - the number of bytes to write

Throws:

java.io.IOException - if the binary data could not be written

writeNumber

public void writeNumber(int v)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(long v)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(java.math.BigInteger v)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(double d)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(float f)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(java.math.BigDecimal dec)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNumber

public void writeNumber(java.lang.String encodedValue)
                 throws java.io.IOException,
                        com.fasterxml.jackson.core.JsonGenerationException,
                        java.lang.UnsupportedOperationException

Specified by:

writeNumber in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

java.lang.UnsupportedOperationException

writeBoolean

public void writeBoolean(boolean state)
                  throws java.io.IOException,
                         com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeBoolean in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeNull

public void writeNull()
               throws java.io.IOException,
                      com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeNull in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeRawUTF8String

public void writeRawUTF8String(byte[] text,
                      int offset,
                      int length)
                        throws java.io.IOException,
                               com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeRawUTF8String in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeUTF8String

public void writeUTF8String(byte[] text,
                   int offset,
                   int length)
                     throws java.io.IOException,
                            com.fasterxml.jackson.core.JsonGenerationException

Specified by:

writeUTF8String in class com.fasterxml.jackson.core.JsonGenerator

Throws:

java.io.IOException

com.fasterxml.jackson.core.JsonGenerationException

writeDateTime

public void writeDateTime(java.util.Date date)
                   throws java.io.IOException

Write a BSON date time

Parameters:

date - The date to write

Throws:

java.io.IOException - If an error occurred in the stream while writing

writeObjectId

public void writeObjectId(ObjectId objectId)
                   throws java.io.IOException

Write a BSON ObjectId

Parameters:

objectId - The objectId to write

Throws:

java.io.IOException - If an error occurred in the stream while writing

flagsToRegexOptions

protected java.lang.String flagsToRegexOptions(int flags)

Converts a a Java flags word into a BSON options pattern

Parameters:

flags - the Java flags

Returns:

the regex options string

writeRegex

public void writeRegex(java.util.regex.Pattern pattern)
                throws java.io.IOException

Write a BSON regex

Parameters:

pattern - The regex to write

Throws:

java.io.IOException - If an error occurred in the stream while writing

writeTimestamp

public void writeTimestamp(Timestamp timestamp)
                    throws java.io.IOException

Write a MongoDB timestamp

Parameters:

timestamp - The timestamp to write

Throws:

java.io.IOException - If an error occurred in the stream while writing

writeJavaScript

public void writeJavaScript(JavaScript javaScript,
                   com.fasterxml.jackson.databind.SerializerProvider provider)
                     throws java.io.IOException

Write a BSON JavaScript object

Parameters:

javaScript - The javaScript to write

provider - The serializer provider, for serializing the scope

Throws:

java.io.IOException - If an error occurred in the stream while writing

writeSymbol

public void writeSymbol(Symbol symbol)
                 throws java.io.IOException

Write a BSON Symbol object

Parameters:

symbol - The symbol to write

Throws:

java.io.IOException - If an error occurred in the stream while writing

_writeString

protected int _writeString(java.lang.String string)
                    throws java.io.IOException

Write a BSON string structure (a null terminated string prependend by the length of the string)

Parameters:

string - The string to write

Returns:

The number of bytes written, including the terminating null byte and the size of the string

Throws:

java.io.IOException - If an error occurred in the stream while writing

_writeCString

protected int _writeCString(java.lang.String string)
                     throws java.io.IOException

Write a BSON cstring structure (a null terminated string)

Parameters:

string - The string to write

Returns:

The number of bytes written, including the terminating null byte

Throws:

java.io.IOException - If an error occurred in the stream while writing

escapeCharacters

protected java.lang.String escapeCharacters(java.lang.String string)
                                     throws java.io.IOException

Escapes the given string according to _characterEscapes. If there are no character escapes returns the original string.

Parameters:

string - the string to escape

Returns:

the escaped string or the original one if there is nothing to escape

Throws:

java.io.IOException - if an escape sequence could not be retrieved