com.fasterxml.jackson.core

Class TokenStreamFactory

java.lang.Object

com.fasterxml.jackson.core.TokenStreamFactory

All Implemented Interfaces:

Versioned, Serializable

Direct Known Subclasses:

JsonFactory

public abstract class TokenStreamFactory
extends Object
implements Versioned, Serializable

Intermediate base class for actual format-specific factories for constructing parsers (reading) and generators (writing). Although full power will only be available with Jackson 3, skeletal implementation added in 2.10 to help conversion of code for 2.x to 3.x migration of projects depending on Jackson

Since:

2.10

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TokenStreamFactory()

Method Summary

Modifier and Type	Method and Description
protected OutputStream	_createDataOutputWrapper(DataOutput out)
protected InputStream	_optimizedStreamFromURL(URL url) Helper methods used for constructing an optimal stream for parsers to use, when input is to be read from an URL.
abstract boolean	canHandleBinaryNatively() Introspection method that higher-level functionality may call to see whether underlying data format can read and write binary data natively; that is, embeded it as-is without using encodings such as Base64.
abstract boolean	canParseAsync() Introspection method that can be used to check whether this factory can create non-blocking parsers: parsers that do not use blocking I/O abstractions but instead use a NonBlockingInputFeeder.
abstract boolean	canUseSchema(FormatSchema schema) Method that can be used to quickly check whether given schema is something that parsers and/or generators constructed by this factory could use.
abstract JsonGenerator	createGenerator(DataOutput out)
abstract JsonGenerator	createGenerator(DataOutput out, JsonEncoding enc)
abstract JsonGenerator	createGenerator(File f, JsonEncoding enc)
abstract JsonGenerator	createGenerator(OutputStream out)
abstract JsonGenerator	createGenerator(OutputStream out, JsonEncoding enc)
abstract JsonGenerator	createGenerator(Writer w)
abstract JsonParser	createNonBlockingByteArrayParser()
abstract JsonParser	createParser(byte[] data)
abstract JsonParser	createParser(byte[] data, int offset, int len)
abstract JsonParser	createParser(char[] content)
abstract JsonParser	createParser(char[] content, int offset, int len)
abstract JsonParser	createParser(DataInput in)
abstract JsonParser	createParser(File f)
abstract JsonParser	createParser(InputStream in)
abstract JsonParser	createParser(Reader r)
abstract JsonParser	createParser(String content)
abstract JsonParser	createParser(URL url)
abstract int	getFormatGeneratorFeatures()
abstract String	getFormatName() Method that returns short textual id identifying format this factory supports.
abstract int	getFormatParserFeatures()
abstract Class<? extends FormatFeature>	getFormatReadFeatureType() Method for accessing kind of FormatFeature that a parser JsonParser produced by this factory would accept, if any; null returned if none.
abstract Class<? extends FormatFeature>	getFormatWriteFeatureType() Method for accessing kind of FormatFeature that a parser JsonGenerator produced by this factory would accept, if any; null returned if none.
abstract int	getGeneratorFeatures()
abstract int	getParserFeatures()
abstract boolean	isEnabled(JsonGenerator.Feature f)
abstract boolean	isEnabled(JsonParser.Feature f)
abstract boolean	requiresPropertyOrdering() Introspection method that higher-level functionality may call to see whether underlying data format requires a stable ordering of object properties or not.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.fasterxml.jackson.core.Versioned

version

Constructor Detail

TokenStreamFactory

public TokenStreamFactory()

Method Detail

requiresPropertyOrdering

public abstract boolean requiresPropertyOrdering()

Introspection method that higher-level functionality may call to see whether underlying data format requires a stable ordering of object properties or not. This is usually used for determining whether to force a stable ordering (like alphabetic ordering by name) if no ordering if explicitly specified.

Default implementation returns false as JSON does NOT require stable ordering. Formats that require ordering include positional textual formats like CSV, and schema-based binary formats like Avro.

Returns:

Whether format supported by this factory requires Object properties to be ordered.

canHandleBinaryNatively

public abstract boolean canHandleBinaryNatively()

Introspection method that higher-level functionality may call to see whether underlying data format can read and write binary data natively; that is, embeded it as-is without using encodings such as Base64.

Default implementation returns false as JSON does not support native access: all binary content must use Base64 encoding. Most binary formats (like Smile and Avro) support native binary content.

Returns:

Whether format supported by this factory supports native binary content

canParseAsync

public abstract boolean canParseAsync()

Introspection method that can be used to check whether this factory can create non-blocking parsers: parsers that do not use blocking I/O abstractions but instead use a NonBlockingInputFeeder.

Returns:

Whether this factory supports non-blocking ("async") parsing or not (and consequently whether createNonBlockingXxx() method(s) work)

getFormatReadFeatureType

public abstract Class<? extends FormatFeature> getFormatReadFeatureType()

Method for accessing kind of FormatFeature that a parser JsonParser produced by this factory would accept, if any; null returned if none.

Returns:

Type of format-specific stream read features, if any; null if none

Since:

2.6

getFormatWriteFeatureType

public abstract Class<? extends FormatFeature> getFormatWriteFeatureType()

Method for accessing kind of FormatFeature that a parser JsonGenerator produced by this factory would accept, if any; null returned if none.

Returns:

Type of format-specific stream read features, if any; null if none

Since:

2.6

canUseSchema

public abstract boolean canUseSchema(FormatSchema schema)

Method that can be used to quickly check whether given schema is something that parsers and/or generators constructed by this factory could use. Note that this means possible use, at the level of data format (i.e. schema is for same data format as parsers and generators this factory constructs); individual schema instances may have further usage restrictions.

Parameters:

schema - Schema instance to check

Returns:

Whether parsers and generators constructed by this factory can use specified format schema instance

Since:

2.1

getFormatName

public abstract String getFormatName()

Method that returns short textual id identifying format this factory supports.

Returns:

Name of the format handled by parsers, generators this factory creates

isEnabled

public abstract boolean isEnabled(JsonParser.Feature f)

isEnabled

public abstract boolean isEnabled(JsonGenerator.Feature f)

getParserFeatures

public abstract int getParserFeatures()

getGeneratorFeatures

public abstract int getGeneratorFeatures()

getFormatParserFeatures

public abstract int getFormatParserFeatures()

getFormatGeneratorFeatures

public abstract int getFormatGeneratorFeatures()

createParser

public abstract JsonParser createParser(byte[] data)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(byte[] data,
                                        int offset,
                                        int len)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(char[] content)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(char[] content,
                                        int offset,
                                        int len)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(DataInput in)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(File f)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(InputStream in)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(Reader r)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(String content)
                                 throws IOException

Throws:

IOException

createParser

public abstract JsonParser createParser(URL url)
                                 throws IOException

Throws:

IOException

createNonBlockingByteArrayParser

public abstract JsonParser createNonBlockingByteArrayParser()
                                                     throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(DataOutput out,
                                              JsonEncoding enc)
                                       throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(DataOutput out)
                                       throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(File f,
                                              JsonEncoding enc)
                                       throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(OutputStream out)
                                       throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(OutputStream out,
                                              JsonEncoding enc)
                                       throws IOException

Throws:

IOException

createGenerator

public abstract JsonGenerator createGenerator(Writer w)
                                       throws IOException

Throws:

IOException

_createDataOutputWrapper

protected OutputStream _createDataOutputWrapper(DataOutput out)

_optimizedStreamFromURL

protected InputStream _optimizedStreamFromURL(URL url)
                                       throws IOException

Helper methods used for constructing an optimal stream for parsers to use, when input is to be read from an URL. This helps when reading file content via URL.

Parameters:

url - Source to read content to parse from

Returns:

InputStream constructed for given URL

Throws:

IOException - If there is a problem accessing content from specified URL