/** Check whether specified generator feature is enabled. */
public final boolean isEnabled(JsonGenerator.Feature f) {
return (_generatorFeatures & f.getMask()) != 0;
}
/**
* Method for enabling specified generator features (check {@link JsonGenerator.Feature} for list
* of features)
*/
public JsonFactory enable(JsonGenerator.Feature f) {
_generatorFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified generator feature (check {@link JsonGenerator.Feature} for list
* of features)
*/
public JsonFactory disable(JsonGenerator.Feature f) {
_generatorFeatures &= ~f.getMask();
return this;
}
/**
* The main factory class of Jackson package, used to configure and construct reader (aka parser,
* {@link JsonParser}) and writer (aka generator, {@link JsonGenerator}) instances.
*
* <p>Factory instances are thread-safe and reusable after configuration (if any). Typically
* applications and services use only a single globally shared factory instance, unless they need
* differently configured factories. Factory reuse is important if efficiency matters; most
* recycling of expensive construct is done on per-factory basis.
*
* <p>Creation of a factory instance is a light-weight operation, and since there is no need for
* pluggable alternative implementations (as there is no "standard" JSON processor API to
* implement), the default constructor is used for constructing factory instances.
*
* @author Tatu Saloranta
*/
public class JsonFactory
implements Versioned, java.io.Serializable // since 2.1 (for Android, mostly)
{
/** Computed for Jackson 2.2.0 release */
private static final long serialVersionUID = 8726401676402117450L;
/*
/**********************************************************
/* Helper types
/**********************************************************
*/
/**
* Enumeration that defines all on/off features that can only be changed for {@link JsonFactory}.
*/
public enum Feature {
// // // Symbol handling (interning etc)
/**
* Feature that determines whether JSON object field names are to be canonicalized using {@link
* String#intern} or not: if enabled, all field names will be intern()ed (and caller can count
* on this being true for all such names); if disabled, no intern()ing is done. There may still
* be basic canonicalization (that is, same String will be used to represent all identical
* object property names for a single document).
*
* <p>Note: this setting only has effect if {@link #CANONICALIZE_FIELD_NAMES} is true --
* otherwise no canonicalization of any sort is done.
*
* <p>This setting is enabled by default.
*/
INTERN_FIELD_NAMES(true),
/**
* Feature that determines whether JSON object field names are to be canonicalized (details of
* how canonicalization is done then further specified by {@link #INTERN_FIELD_NAMES}).
*
* <p>This setting is enabled by default.
*/
CANONICALIZE_FIELD_NAMES(true);
/** Whether feature is enabled or disabled by default. */
private final boolean _defaultState;
/** Method that calculates bit set (flags) of all features that are enabled by default. */
public static int collectDefaults() {
int flags = 0;
for (Feature f : values()) {
if (f.enabledByDefault()) {
flags |= f.getMask();
}
}
return flags;
}
private Feature(boolean defaultState) {
_defaultState = defaultState;
}
public boolean enabledByDefault() {
return _defaultState;
}
public boolean enabledIn(int flags) {
return (flags & getMask()) != 0;
}
public int getMask() {
return (1 << ordinal());
}
}
/*
/**********************************************************
/* Constants
/**********************************************************
*/
/** Name used to identify JSON format (and returned by {@link #getFormatName()} */
public static final String FORMAT_NAME_JSON = "JSON";
/** Bitfield (set of flags) of all factory features that are enabled by default. */
protected static final int DEFAULT_FACTORY_FEATURE_FLAGS = JsonFactory.Feature.collectDefaults();
/** Bitfield (set of flags) of all parser features that are enabled by default. */
protected static final int DEFAULT_PARSER_FEATURE_FLAGS = JsonParser.Feature.collectDefaults();
/** Bitfield (set of flags) of all generator features that are enabled by default. */
protected static final int DEFAULT_GENERATOR_FEATURE_FLAGS =
JsonGenerator.Feature.collectDefaults();
private static final SerializableString DEFAULT_ROOT_VALUE_SEPARATOR =
DefaultPrettyPrinter.DEFAULT_ROOT_VALUE_SEPARATOR;
/*
/**********************************************************
/* Buffer, symbol table management
/**********************************************************
*/
/**
* This <code>ThreadLocal</code> contains a {@link java.lang.ref.SoftReference} to a {@link
* BufferRecycler} used to provide a low-cost buffer recycling between reader and writer
* instances.
*/
protected static final ThreadLocal<SoftReference<BufferRecycler>> _recyclerRef =
new ThreadLocal<SoftReference<BufferRecycler>>();
/**
* Each factory comes equipped with a shared root symbol table. It should not be linked back to
* the original blueprint, to avoid contents from leaking between factories.
*/
protected final transient CharsToNameCanonicalizer _rootCharSymbols =
CharsToNameCanonicalizer.createRoot();
/**
* Alternative to the basic symbol table, some stream-based parsers use different name
* canonicalization method.
*
* <p>TODO: should clean up this; looks messy having 2 alternatives with not very clear
* differences.
*/
protected final transient BytesToNameCanonicalizer _rootByteSymbols =
BytesToNameCanonicalizer.createRoot();
/*
/**********************************************************
/* Configuration
/**********************************************************
*/
/**
* Object that implements conversion functionality between Java objects and JSON content. For base
* JsonFactory implementation usually not set by default, but can be explicitly set. Sub-classes
* (like @link org.codehaus.jackson.map.MappingJsonFactory} usually provide an implementation.
*/
protected ObjectCodec _objectCodec;
/** Currently enabled factory features. */
protected int _factoryFeatures = DEFAULT_FACTORY_FEATURE_FLAGS;
/** Currently enabled parser features. */
protected int _parserFeatures = DEFAULT_PARSER_FEATURE_FLAGS;
/** Currently enabled generator features. */
protected int _generatorFeatures = DEFAULT_GENERATOR_FEATURE_FLAGS;
/**
* Definition of custom character escapes to use for generators created by this factory, if any.
* If null, standard data format specific escapes are used.
*/
protected CharacterEscapes _characterEscapes;
/**
* Optional helper object that may decorate input sources, to do additional processing on input
* during parsing.
*/
protected InputDecorator _inputDecorator;
/**
* Optional helper object that may decorate output object, to do additional processing on output
* during content generation.
*/
protected OutputDecorator _outputDecorator;
/**
* Separator used between root-level values, if any; null indicates "do not add separator".
* Default separator is a single space character.
*
* @since 2.1
*/
protected SerializableString _rootValueSeparator = DEFAULT_ROOT_VALUE_SEPARATOR;
/*
/**********************************************************
/* Construction
/**********************************************************
*/
/**
* Default constructor used to create factory instances. Creation of a factory instance is a
* light-weight operation, but it is still a good idea to reuse limited number of factory
* instances (and quite often just a single instance): factories are used as context for storing
* some reused processing objects (such as symbol tables parsers use) and this reuse only works
* within context of a single factory instance.
*/
public JsonFactory() {
this((ObjectCodec) null);
}
public JsonFactory(ObjectCodec oc) {
_objectCodec = oc;
}
/**
* Constructor used when copy()ing a factory instance.
*
* @since 2.2.1
*/
protected JsonFactory(JsonFactory src, ObjectCodec codec) {
_objectCodec = null;
_factoryFeatures = src._factoryFeatures;
_parserFeatures = src._parserFeatures;
_generatorFeatures = src._generatorFeatures;
_characterEscapes = src._characterEscapes;
_inputDecorator = src._inputDecorator;
_outputDecorator = src._outputDecorator;
_rootValueSeparator = src._rootValueSeparator;
/* 27-Apr-2013, tatu: How about symbol table; should we try to
* reuse shared symbol tables? Could be more efficient that way;
* although can slightly add to concurrency overhead.
*/
}
/**
* Method for constructing a new {@link JsonFactory} that has the same settings as this instance,
* but is otherwise independent (i.e. nothing is actually shared, symbol tables are separate).
* Note that {@link ObjectCodec} reference is not copied but is set to null; caller typically
* needs to set it after calling this method. Reason for this is that the codec is used for
* callbacks, and assumption is that there is strict 1-to-1 mapping between codec, factory. Caller
* has to, then, explicitly set codec after making the copy.
*
* @since 2.1
*/
public JsonFactory copy() {
_checkInvalidCopy(JsonFactory.class);
// as per above, do clear ObjectCodec
return new JsonFactory(this, null);
}
/**
* @since 2.1
* @param exp
*/
protected void _checkInvalidCopy(Class<?> exp) {
if (getClass() != exp) {
throw new IllegalStateException(
"Failed copy(): "
+ getClass().getName()
+ " (version: "
+ version()
+ ") does not override copy(); it has to");
}
}
/*
/**********************************************************
/* Serializable overrides
/**********************************************************
*/
/**
* Method that we need to override to actually make restoration go through constructors etc. Also:
* must be overridden by sub-classes as well.
*/
protected Object readResolve() {
return new JsonFactory(this, _objectCodec);
}
/*
/**********************************************************
/* Format detection functionality (since 1.8)
/**********************************************************
*/
/**
* 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.
*
* @since 2.1
*/
public boolean canUseSchema(FormatSchema schema) {
String ourFormat = getFormatName();
return (ourFormat != null) && ourFormat.equals(schema.getSchemaType());
}
/**
* Method that returns short textual id identifying format this factory supports.
*
* <p>Note: sub-classes should override this method; default implementation will return null for
* all sub-classes
*/
public String getFormatName() {
/* Somewhat nasty check: since we can't make this abstract
* (due to backwards compatibility concerns), need to prevent
* format name "leakage"
*/
if (getClass() == JsonFactory.class) {
return FORMAT_NAME_JSON;
}
return null;
}
public MatchStrength hasFormat(InputAccessor acc) throws IOException {
// since we can't keep this abstract, only implement for "vanilla" instance
if (getClass() == JsonFactory.class) {
return hasJSONFormat(acc);
}
return null;
}
/**
* Method that can be called to determine if a custom {@link ObjectCodec} is needed for binding
* data parsed using {@link JsonParser} constructed by this factory (which typically also implies
* the same for serialization with {@link JsonGenerator}).
*
* @return True if custom codec is needed with parsers and generators created by this factory;
* false if a general {@link ObjectCodec} is enough
* @since 2.1
*/
public boolean requiresCustomCodec() {
return false;
}
/**
* Helper method that can be called to determine if content accessed using given accessor seems to
* be JSON content.
*/
protected MatchStrength hasJSONFormat(InputAccessor acc) throws IOException {
return ByteSourceJsonBootstrapper.hasJSONFormat(acc);
}
/*
/**********************************************************
/* Versioned
/**********************************************************
*/
@Override
public Version version() {
return PackageVersion.VERSION;
}
/*
/**********************************************************
/* Configuration, factory features
/**********************************************************
*/
/**
* Method for enabling or disabling specified parser feature (check {@link JsonParser.Feature} for
* list of features)
*/
public final JsonFactory configure(JsonFactory.Feature f, boolean state) {
return state ? enable(f) : disable(f);
}
/**
* Method for enabling specified parser feature (check {@link JsonFactory.Feature} for list of
* features)
*/
public JsonFactory enable(JsonFactory.Feature f) {
_factoryFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified parser features (check {@link JsonFactory.Feature} for list of
* features)
*/
public JsonFactory disable(JsonFactory.Feature f) {
_factoryFeatures &= ~f.getMask();
return this;
}
/** Checked whether specified parser feature is enabled. */
public final boolean isEnabled(JsonFactory.Feature f) {
return (_factoryFeatures & f.getMask()) != 0;
}
/*
/**********************************************************
/* Configuration, parser configuration
/**********************************************************
*/
/**
* Method for enabling or disabling specified parser feature (check {@link JsonParser.Feature} for
* list of features)
*/
public final JsonFactory configure(JsonParser.Feature f, boolean state) {
return state ? enable(f) : disable(f);
}
/**
* Method for enabling specified parser feature (check {@link JsonParser.Feature} for list of
* features)
*/
public JsonFactory enable(JsonParser.Feature f) {
_parserFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified parser features (check {@link JsonParser.Feature} for list of
* features)
*/
public JsonFactory disable(JsonParser.Feature f) {
_parserFeatures &= ~f.getMask();
return this;
}
/** Checked whether specified parser feature is enabled. */
public final boolean isEnabled(JsonParser.Feature f) {
return (_parserFeatures & f.getMask()) != 0;
}
/**
* Method for getting currently configured input decorator (if any; there is no default
* decorator).
*/
public InputDecorator getInputDecorator() {
return _inputDecorator;
}
/** Method for overriding currently configured input decorator */
public JsonFactory setInputDecorator(InputDecorator d) {
_inputDecorator = d;
return this;
}
/*
/**********************************************************
/* Configuration, generator settings
/**********************************************************
*/
/**
* Method for enabling or disabling specified generator feature (check {@link
* JsonGenerator.Feature} for list of features)
*/
public final JsonFactory configure(JsonGenerator.Feature f, boolean state) {
return state ? enable(f) : disable(f);
}
/**
* Method for enabling specified generator features (check {@link JsonGenerator.Feature} for list
* of features)
*/
public JsonFactory enable(JsonGenerator.Feature f) {
_generatorFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified generator feature (check {@link JsonGenerator.Feature} for list
* of features)
*/
public JsonFactory disable(JsonGenerator.Feature f) {
_generatorFeatures &= ~f.getMask();
return this;
}
/** Check whether specified generator feature is enabled. */
public final boolean isEnabled(JsonGenerator.Feature f) {
return (_generatorFeatures & f.getMask()) != 0;
}
/** Method for accessing custom escapes factory uses for {@link JsonGenerator}s it creates. */
public CharacterEscapes getCharacterEscapes() {
return _characterEscapes;
}
/** Method for defining custom escapes factory uses for {@link JsonGenerator}s it creates. */
public JsonFactory setCharacterEscapes(CharacterEscapes esc) {
_characterEscapes = esc;
return this;
}
/**
* Method for getting currently configured output decorator (if any; there is no default
* decorator).
*/
public OutputDecorator getOutputDecorator() {
return _outputDecorator;
}
/** Method for overriding currently configured output decorator */
public JsonFactory setOutputDecorator(OutputDecorator d) {
_outputDecorator = d;
return this;
}
/**
* Method that allows overriding String used for separating root-level JSON values (default is
* single space character)
*
* @param sep Separator to use, if any; null means that no separator is automatically added
* @since 2.1
*/
public JsonFactory setRootValueSeparator(String sep) {
_rootValueSeparator = (sep == null) ? null : new SerializedString(sep);
return this;
}
/** @since 2.1 */
public String getRootValueSeparator() {
return (_rootValueSeparator == null) ? null : _rootValueSeparator.getValue();
}
/*
/**********************************************************
/* Configuration, other
/**********************************************************
*/
/**
* Method for associating a {@link ObjectCodec} (typically a <code>
* com.fasterxml.jackson.databind.ObjectMapper</code>) with this factory (and more importantly,
* parsers and generators it constructs). This is needed to use data-binding methods of {@link
* JsonParser} and {@link JsonGenerator} instances.
*/
public JsonFactory setCodec(ObjectCodec oc) {
_objectCodec = oc;
return this;
}
public ObjectCodec getCodec() {
return _objectCodec;
}
/*
/**********************************************************
/* Parser factories (new ones, as per [Issue-25])
/**********************************************************
*/
/**
* Method for constructing JSON parser instance to parse contents of specified file. Encoding is
* auto-detected from contents according to JSON specification recommended mechanism.
*
* <p>Underlying input stream (needed for reading contents) will be <b>owned</b> (and managed,
* i.e. closed as need be) by the parser, since caller has no access to it.
*
* @param f File that contains JSON content to parse
* @since 2.1
*/
@SuppressWarnings("resource")
public JsonParser createParser(File f) throws IOException, JsonParseException {
// true, since we create InputStream from File
IOContext ctxt = _createContext(f, true);
InputStream in = new FileInputStream(f);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
in = _inputDecorator.decorate(ctxt, in);
}
return _createParser(in, ctxt);
}
/**
* Method for constructing JSON parser instance to parse contents of resource reference by given
* URL. Encoding is auto-detected from contents according to JSON specification recommended
* mechanism.
*
* <p>Underlying input stream (needed for reading contents) will be <b>owned</b> (and managed,
* i.e. closed as need be) by the parser, since caller has no access to it.
*
* @param url URL pointing to resource that contains JSON content to parse
* @since 2.1
*/
public JsonParser createParser(URL url) throws IOException, JsonParseException {
// true, since we create InputStream from URL
IOContext ctxt = _createContext(url, true);
InputStream in = _optimizedStreamFromURL(url);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
in = _inputDecorator.decorate(ctxt, in);
}
return _createParser(in, ctxt);
}
/**
* Method for constructing JSON parser instance to parse the contents accessed via specified input
* stream.
*
* <p>The input stream will <b>not be owned</b> by the parser, it will still be managed (i.e.
* closed if end-of-stream is reacher, or parser close method called) if (and only if) {@link
* com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} is enabled.
*
* <p>Note: no encoding argument is taken since it can always be auto-detected as suggested by
* JSON RFC.
*
* @param in InputStream to use for reading JSON content to parse
* @since 2.1
*/
public JsonParser createParser(InputStream in) throws IOException, JsonParseException {
IOContext ctxt = _createContext(in, false);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
in = _inputDecorator.decorate(ctxt, in);
}
return _createParser(in, ctxt);
}
/**
* Method for constructing parser for parsing the contents accessed via specified Reader.
*
* <p>The read stream will <b>not be owned</b> by the parser, it will still be managed (i.e.
* closed if end-of-stream is reacher, or parser close method called) if (and only if) {@link
* com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} is enabled.
*
* @param r Reader to use for reading JSON content to parse
* @since 2.1
*/
public JsonParser createParser(Reader r) throws IOException, JsonParseException {
// false -> we do NOT own Reader (did not create it)
IOContext ctxt = _createContext(r, false);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
r = _inputDecorator.decorate(ctxt, r);
}
return _createParser(r, ctxt);
}
/**
* Method for constructing parser for parsing the contents of given byte array.
*
* @since 2.1
*/
public JsonParser createParser(byte[] data) throws IOException, JsonParseException {
IOContext ctxt = _createContext(data, true);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
InputStream in = _inputDecorator.decorate(ctxt, data, 0, data.length);
if (in != null) {
return _createParser(in, ctxt);
}
}
return _createParser(data, 0, data.length, ctxt);
}
/**
* Method for constructing parser for parsing the contents of given byte array.
*
* @param data Buffer that contains data to parse
* @param offset Offset of the first data byte within buffer
* @param len Length of contents to parse within buffer
* @since 2.1
*/
public JsonParser createParser(byte[] data, int offset, int len)
throws IOException, JsonParseException {
IOContext ctxt = _createContext(data, true);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
InputStream in = _inputDecorator.decorate(ctxt, data, offset, len);
if (in != null) {
return _createParser(in, ctxt);
}
}
return _createParser(data, offset, len, ctxt);
}
/**
* Method for constructing parser for parsing contents of given String.
*
* @since 2.1
*/
public JsonParser createParser(String content) throws IOException, JsonParseException {
Reader r = new StringReader(content);
// true -> we own the Reader (and must close); not a big deal
IOContext ctxt = _createContext(r, true);
// [JACKSON-512]: allow wrapping with InputDecorator
if (_inputDecorator != null) {
r = _inputDecorator.decorate(ctxt, r);
}
return _createParser(r, ctxt);
}
/*
/**********************************************************
/* Parser factories (old ones, as per [Issue-25])
/**********************************************************
*/
/**
* Method for constructing JSON parser instance to parse contents of specified file. Encoding is
* auto-detected from contents according to JSON specification recommended mechanism.
*
* <p>Underlying input stream (needed for reading contents) will be <b>owned</b> (and managed,
* i.e. closed as need be) by the parser, since caller has no access to it.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @param f File that contains JSON content to parse
* @deprecated Since 2.2, use {@link #createParser(File)} instead.
*/
@Deprecated
public JsonParser createJsonParser(File f) throws IOException, JsonParseException {
return createParser(f);
}
/**
* Method for constructing JSON parser instance to parse contents of resource reference by given
* URL. Encoding is auto-detected from contents according to JSON specification recommended
* mechanism.
*
* <p>Underlying input stream (needed for reading contents) will be <b>owned</b> (and managed,
* i.e. closed as need be) by the parser, since caller has no access to it.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @param url URL pointing to resource that contains JSON content to parse
* @deprecated Since 2.2, use {@link #createParser(URL)} instead.
*/
@Deprecated
public JsonParser createJsonParser(URL url) throws IOException, JsonParseException {
return createParser(url);
}
/**
* Method for constructing JSON parser instance to parse the contents accessed via specified input
* stream.
*
* <p>The input stream will <b>not be owned</b> by the parser, it will still be managed (i.e.
* closed if end-of-stream is reacher, or parser close method called) if (and only if) {@link
* com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} is enabled.
*
* <p>Note: no encoding argument is taken since it can always be auto-detected as suggested by
* JSON RFC.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @param in InputStream to use for reading JSON content to parse
* @deprecated Since 2.2, use {@link #createParser(InputStream)} instead.
*/
@Deprecated
public JsonParser createJsonParser(InputStream in) throws IOException, JsonParseException {
return createParser(in);
}
/**
* Method for constructing parser for parsing the contents accessed via specified Reader.
*
* <p>The read stream will <b>not be owned</b> by the parser, it will still be managed (i.e.
* closed if end-of-stream is reacher, or parser close method called) if (and only if) {@link
* com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} is enabled.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @param r Reader to use for reading JSON content to parse
* @deprecated Since 2.2, use {@link #createParser(Reader)} instead.
*/
@Deprecated
public JsonParser createJsonParser(Reader r) throws IOException, JsonParseException {
return createParser(r);
}
/**
* Method for constructing parser for parsing the contents of given byte array.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @deprecated Since 2.2, use {@link #createParser(byte[])} instead.
*/
@Deprecated
public JsonParser createJsonParser(byte[] data) throws IOException, JsonParseException {
return createParser(data);
}
/**
* Method for constructing parser for parsing the contents of given byte array.
*
* <p>NOTE: as of 2.1, should not be used (will be deprecated in 2.2); instead, should call <code>
* createParser</code>.
*
* @param data Buffer that contains data to parse
* @param offset Offset of the first data byte within buffer
* @param len Length of contents to parse within buffer
* @deprecated Since 2.2, use {@link #createParser(byte[],int,int)} instead.
*/
@Deprecated
public JsonParser createJsonParser(byte[] data, int offset, int len)
throws IOException, JsonParseException {
return createParser(data, offset, len);
}
/**
* Method for constructing parser for parsing contents of given String.
*
* @deprecated Since 2.2, use {@link #createParser(String)} instead.
*/
@Deprecated
public JsonParser createJsonParser(String content) throws IOException, JsonParseException {
return createParser(content);
}
/*
/**********************************************************
/* Generator factories, new (as per [Issue-25]
/**********************************************************
*/
/**
* Method for constructing JSON generator for writing JSON content using specified output stream.
* Encoding to use must be specified, and needs to be one of available types (as per JSON
* specification).
*
* <p>Underlying stream <b>is NOT owned</b> by the generator constructed, so that generator will
* NOT close the output stream when {@link JsonGenerator#close} is called (unless auto-closing
* feature, {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} is
* enabled). Using application needs to close it explicitly if this is the case.
*
* <p>Note: there are formats that use fixed encoding (like most binary data formats) and that
* ignore passed in encoding.
*
* @param out OutputStream to use for writing JSON content
* @param enc Character encoding to use
* @since 2.1
*/
public JsonGenerator createGenerator(OutputStream out, JsonEncoding enc) throws IOException {
// false -> we won't manage the stream unless explicitly directed to
IOContext ctxt = _createContext(out, false);
ctxt.setEncoding(enc);
if (enc == JsonEncoding.UTF8) {
// [JACKSON-512]: allow wrapping with _outputDecorator
if (_outputDecorator != null) {
out = _outputDecorator.decorate(ctxt, out);
}
return _createUTF8Generator(out, ctxt);
}
Writer w = _createWriter(out, enc, ctxt);
// [JACKSON-512]: allow wrapping with _outputDecorator
if (_outputDecorator != null) {
w = _outputDecorator.decorate(ctxt, w);
}
return _createGenerator(w, ctxt);
}
/**
* Convenience method for constructing generator that uses default encoding of the format (UTF-8
* for JSON and most other data formats).
*
* <p>Note: there are formats that use fixed encoding (like most binary data formats).
*
* @since 2.1
*/
public JsonGenerator createGenerator(OutputStream out) throws IOException {
return createGenerator(out, JsonEncoding.UTF8);
}
/**
* Method for constructing JSON generator for writing JSON content using specified Writer.
*
* <p>Underlying stream <b>is NOT owned</b> by the generator constructed, so that generator will
* NOT close the Reader when {@link JsonGenerator#close} is called (unless auto-closing feature,
* {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} is enabled). Using
* application needs to close it explicitly.
*
* @since 2.1
* @param out Writer to use for writing JSON content
*/
public JsonGenerator createGenerator(Writer out) throws IOException {
IOContext ctxt = _createContext(out, false);
// [JACKSON-512]: allow wrapping with _outputDecorator
if (_outputDecorator != null) {
out = _outputDecorator.decorate(ctxt, out);
}
return _createGenerator(out, ctxt);
}
/**
* Method for constructing JSON generator for writing JSON content to specified file, overwriting
* contents it might have (or creating it if such file does not yet exist). Encoding to use must
* be specified, and needs to be one of available types (as per JSON specification).
*
* <p>Underlying stream <b>is owned</b> by the generator constructed, i.e. generator will handle
* closing of file when {@link JsonGenerator#close} is called.
*
* @param f File to write contents to
* @param enc Character encoding to use
* @since 2.1
*/
public JsonGenerator createGenerator(File f, JsonEncoding enc) throws IOException {
OutputStream out = new FileOutputStream(f);
// true -> yes, we have to manage the stream since we created it
IOContext ctxt = _createContext(out, true);
ctxt.setEncoding(enc);
if (enc == JsonEncoding.UTF8) {
// [JACKSON-512]: allow wrapping with _outputDecorator
if (_outputDecorator != null) {
out = _outputDecorator.decorate(ctxt, out);
}
return _createUTF8Generator(out, ctxt);
}
Writer w = _createWriter(out, enc, ctxt);
// [JACKSON-512]: allow wrapping with _outputDecorator
if (_outputDecorator != null) {
w = _outputDecorator.decorate(ctxt, w);
}
return _createGenerator(w, ctxt);
}
/*
/**********************************************************
/* Generator factories, old (as per [Issue-25]
/**********************************************************
*/
/**
* Method for constructing JSON generator for writing JSON content using specified output stream.
* Encoding to use must be specified, and needs to be one of available types (as per JSON
* specification).
*
* <p>Underlying stream <b>is NOT owned</b> by the generator constructed, so that generator will
* NOT close the output stream when {@link JsonGenerator#close} is called (unless auto-closing
* feature, {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} is
* enabled). Using application needs to close it explicitly if this is the case.
*
* <p>Note: there are formats that use fixed encoding (like most binary data formats) and that
* ignore passed in encoding.
*
* @param out OutputStream to use for writing JSON content
* @param enc Character encoding to use
* @deprecated Since 2.2, use {@link #createGenerator(OutputStream, JsonEncoding)} instead.
*/
@Deprecated
public JsonGenerator createJsonGenerator(OutputStream out, JsonEncoding enc) throws IOException {
return createGenerator(out, enc);
}
/**
* Method for constructing JSON generator for writing JSON content using specified Writer.
*
* <p>Underlying stream <b>is NOT owned</b> by the generator constructed, so that generator will
* NOT close the Reader when {@link JsonGenerator#close} is called (unless auto-closing feature,
* {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} is enabled). Using
* application needs to close it explicitly.
*
* @param out Writer to use for writing JSON content
* @deprecated Since 2.2, use {@link #createGenerator(Writer)} instead.
*/
@Deprecated
public JsonGenerator createJsonGenerator(Writer out) throws IOException {
return createGenerator(out);
}
/**
* Convenience method for constructing generator that uses default encoding of the format (UTF-8
* for JSON and most other data formats).
*
* <p>Note: there are formats that use fixed encoding (like most binary data formats).
*
* @deprecated Since 2.2, use {@link #createGenerator(OutputStream)} instead.
*/
@Deprecated
public JsonGenerator createJsonGenerator(OutputStream out) throws IOException {
return createGenerator(out, JsonEncoding.UTF8);
}
/**
* Method for constructing JSON generator for writing JSON content to specified file, overwriting
* contents it might have (or creating it if such file does not yet exist). Encoding to use must
* be specified, and needs to be one of available types (as per JSON specification).
*
* <p>Underlying stream <b>is owned</b> by the generator constructed, i.e. generator will handle
* closing of file when {@link JsonGenerator#close} is called.
*
* @param f File to write contents to
* @param enc Character encoding to use
* @deprecated Since 2.2, use {@link #createGenerator(File,JsonEncoding)} instead.
*/
@Deprecated
public JsonGenerator createJsonGenerator(File f, JsonEncoding enc) throws IOException {
return createGenerator(f, enc);
}
/*
/**********************************************************
/* Factory methods used by factory for creating parser instances,
/* overridable by sub-classes
/**********************************************************
*/
/**
* Overridable factory method that actually instantiates desired parser given {@link InputStream}
* and context object.
*
* <p>This method is specifically designed to remain compatible between minor versions so that
* sub-classes can count on it being called as expected. That is, it is part of official interface
* from sub-class perspective, although not a public method available to users of factory
* implementations.
*
* @since 2.1
*/
protected JsonParser _createParser(InputStream in, IOContext ctxt)
throws IOException, JsonParseException {
// As per [JACKSON-259], may want to fully disable canonicalization:
return new ByteSourceJsonBootstrapper(ctxt, in)
.constructParser(
_parserFeatures,
_objectCodec,
_rootByteSymbols,
_rootCharSymbols,
isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES),
isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES));
}
/** @deprecated since 2.1 -- use {@link #_createParser(InputStream, IOContext)} instead */
@Deprecated
protected JsonParser _createJsonParser(InputStream in, IOContext ctxt)
throws IOException, JsonParseException {
return _createParser(in, ctxt);
}
/**
* Overridable factory method that actually instantiates parser using given {@link Reader} object
* for reading content.
*
* <p>This method is specifically designed to remain compatible between minor versions so that
* sub-classes can count on it being called as expected. That is, it is part of official interface
* from sub-class perspective, although not a public method available to users of factory
* implementations.
*
* @since 2.1
*/
protected JsonParser _createParser(Reader r, IOContext ctxt)
throws IOException, JsonParseException {
return new ReaderBasedJsonParser(
ctxt,
_parserFeatures,
r,
_objectCodec,
_rootCharSymbols.makeChild(
isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES),
isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES)));
}
/** @deprecated since 2.1 -- use {@link #_createParser(Reader, IOContext)} instead */
@Deprecated
protected JsonParser _createJsonParser(Reader r, IOContext ctxt)
throws IOException, JsonParseException {
return _createParser(r, ctxt);
}
/**
* Overridable factory method that actually instantiates parser using given {@link Reader} object
* for reading content passed as raw byte array.
*
* <p>This method is specifically designed to remain compatible between minor versions so that
* sub-classes can count on it being called as expected. That is, it is part of official interface
* from sub-class perspective, although not a public method available to users of factory
* implementations.
*/
protected JsonParser _createParser(byte[] data, int offset, int len, IOContext ctxt)
throws IOException, JsonParseException {
return new ByteSourceJsonBootstrapper(ctxt, data, offset, len)
.constructParser(
_parserFeatures,
_objectCodec,
_rootByteSymbols,
_rootCharSymbols,
isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES),
isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES));
}
/** @deprecated since 2.1 -- use {@link #_createParser(byte[], int, int, IOContext)} instead */
@Deprecated
protected JsonParser _createJsonParser(byte[] data, int offset, int len, IOContext ctxt)
throws IOException, JsonParseException {
return _createParser(data, offset, len, ctxt);
}
/*
/**********************************************************
/* Factory methods used by factory for creating generator instances,
/* overridable by sub-classes
/**********************************************************
*/
/**
* Overridable factory method that actually instantiates generator for given {@link Writer} and
* context object.
*
* <p>This method is specifically designed to remain compatible between minor versions so that
* sub-classes can count on it being called as expected. That is, it is part of official interface
* from sub-class perspective, although not a public method available to users of factory
* implementations.
*/
protected JsonGenerator _createGenerator(Writer out, IOContext ctxt) throws IOException {
WriterBasedJsonGenerator gen =
new WriterBasedJsonGenerator(ctxt, _generatorFeatures, _objectCodec, out);
if (_characterEscapes != null) {
gen.setCharacterEscapes(_characterEscapes);
}
SerializableString rootSep = _rootValueSeparator;
if (rootSep != DEFAULT_ROOT_VALUE_SEPARATOR) {
gen.setRootValueSeparator(rootSep);
}
return gen;
}
/** @deprecated since 2.1 -- use {@link #_createGenerator(Writer, IOContext)} instead */
@Deprecated
protected JsonGenerator _createJsonGenerator(Writer out, IOContext ctxt) throws IOException {
/* NOTE: MUST call the deprecated method until it is deleted, just so
* that override still works as expected, for now.
*/
return _createGenerator(out, ctxt);
}
/**
* Overridable factory method that actually instantiates generator for given {@link OutputStream}
* and context object, using UTF-8 encoding.
*
* <p>This method is specifically designed to remain compatible between minor versions so that
* sub-classes can count on it being called as expected. That is, it is part of official interface
* from sub-class perspective, although not a public method available to users of factory
* implementations.
*/
protected JsonGenerator _createUTF8Generator(OutputStream out, IOContext ctxt)
throws IOException {
UTF8JsonGenerator gen = new UTF8JsonGenerator(ctxt, _generatorFeatures, _objectCodec, out);
if (_characterEscapes != null) {
gen.setCharacterEscapes(_characterEscapes);
}
SerializableString rootSep = _rootValueSeparator;
if (rootSep != DEFAULT_ROOT_VALUE_SEPARATOR) {
gen.setRootValueSeparator(rootSep);
}
return gen;
}
/** @deprecated since 2.1 */
@Deprecated
protected JsonGenerator _createUTF8JsonGenerator(OutputStream out, IOContext ctxt)
throws IOException {
return _createUTF8Generator(out, ctxt);
}
protected Writer _createWriter(OutputStream out, JsonEncoding enc, IOContext ctxt)
throws IOException {
// note: this should not get called any more (caller checks, dispatches)
if (enc == JsonEncoding.UTF8) { // We have optimized writer for UTF-8
return new UTF8Writer(ctxt, out);
}
// not optimal, but should do unless we really care about UTF-16/32 encoding speed
return new OutputStreamWriter(out, enc.getJavaName());
}
/*
/**********************************************************
/* Internal factory methods, other
/**********************************************************
*/
/** Overridable factory method that actually instantiates desired context object. */
protected IOContext _createContext(Object srcRef, boolean resourceManaged) {
return new IOContext(_getBufferRecycler(), srcRef, resourceManaged);
}
/**
* Method used by factory to create buffer recycler instances for parsers and generators.
*
* <p>Note: only public to give access for <code>ObjectMapper</code>
*/
public BufferRecycler _getBufferRecycler() {
SoftReference<BufferRecycler> ref = _recyclerRef.get();
BufferRecycler br = (ref == null) ? null : ref.get();
if (br == null) {
br = new BufferRecycler();
_recyclerRef.set(new SoftReference<BufferRecycler>(br));
}
return br;
}
/**
* 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.
*/
protected InputStream _optimizedStreamFromURL(URL url) throws IOException {
if ("file".equals(url.getProtocol())) {
/* Can not do this if the path refers
* to a network drive on windows. This fixes the problem;
* might not be needed on all platforms (NFS?), but should not
* matter a lot: performance penalty of extra wrapping is more
* relevant when accessing local file system.
*/
String host = url.getHost();
if (host == null || host.length() == 0) {
// [Issue#48]: Let's try to avoid probs with URL encoded stuff
String path = url.getPath();
if (path.indexOf('%') < 0) {
return new FileInputStream(url.getPath());
}
// otherwise, let's fall through and let URL decoder do its magic
}
}
return url.openStream();
}
}