/**
* Factory used for constructing {@link SmileParser} and {@link SmileGenerator} instances; both of
* which handle <a href="http://wiki.fasterxml.com/SmileFormat">Smile</a> encoded data.
*
* <p>Extends {@link JsonFactory} mostly so that users can actually use it in place of regular
* non-Smile factory instances.
*
* <p>Note on using non-byte-based sources/targets (char based, like {@link java.io.Reader} and
* {@link java.io.Writer}): these can not be used for Smile-format documents, and thus will either
* downgrade to textual JSON (when parsing), or throw exception (when trying to create generator).
*
* @author Tatu Saloranta
*/
public class SmileFactory extends JsonFactory {
/** Name used to identify Smile format. (and returned by {@link #getFormatName()} */
public static final String FORMAT_NAME_SMILE = "Smile";
/** Bitfield (set of flags) of all parser features that are enabled by default. */
static final int DEFAULT_SMILE_PARSER_FEATURE_FLAGS = SmileParser.Feature.collectDefaults();
/** Bitfield (set of flags) of all generator features that are enabled by default. */
static final int DEFAULT_SMILE_GENERATOR_FEATURE_FLAGS = SmileGenerator.Feature.collectDefaults();
/*
/**********************************************************
/* Configuration
/**********************************************************
*/
/**
* Whether non-supported methods (ones trying to output using char-based targets like {@link
* java.io.Writer}, for example) should be delegated to regular Jackson JSON processing (if set to
* true); or throw {@link UnsupportedOperationException} (if set to false)
*/
protected boolean _cfgDelegateToTextual;
protected int _smileParserFeatures = DEFAULT_SMILE_PARSER_FEATURE_FLAGS;
protected int _smileGeneratorFeatures = DEFAULT_SMILE_GENERATOR_FEATURE_FLAGS;
/*
/**********************************************************
/* Factory construction, configuration
/**********************************************************
*/
/**
* 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 SmileFactory() {
this(null);
}
public SmileFactory(ObjectCodec oc) {
super(oc);
}
// @since 2.1
@Override
public SmileFactory copy() {
_checkInvalidCopy(SmileFactory.class);
// note: as with base class, must NOT copy mapper reference
return new SmileFactory(null);
}
public void delegateToTextual(boolean state) {
_cfgDelegateToTextual = state;
}
/*
/**********************************************************
/* Versioned
/**********************************************************
*/
@Override
public Version version() {
return ModuleVersion.instance.version();
}
/*
/**********************************************************
/* Format detection functionality (since 1.8)
/**********************************************************
*/
@Override
public String getFormatName() {
return FORMAT_NAME_SMILE;
}
/** Sub-classes need to override this method (as of 1.8) */
@Override
public MatchStrength hasFormat(InputAccessor acc) throws IOException {
return SmileParserBootstrapper.hasSmileFormat(acc);
}
/*
/**********************************************************
/* Configuration, parser settings
/**********************************************************
*/
/**
* Method for enabling or disabling specified parser feature (check {@link SmileParser.Feature}
* for list of features)
*/
public final SmileFactory configure(SmileParser.Feature f, boolean state) {
if (state) {
enable(f);
} else {
disable(f);
}
return this;
}
/**
* Method for enabling specified parser feature (check {@link SmileParser.Feature} for list of
* features)
*/
public SmileFactory enable(SmileParser.Feature f) {
_smileParserFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified parser features (check {@link SmileParser.Feature} for list of
* features)
*/
public SmileFactory disable(SmileParser.Feature f) {
_smileParserFeatures &= ~f.getMask();
return this;
}
/** Checked whether specified parser feature is enabled. */
public final boolean isEnabled(SmileParser.Feature f) {
return (_smileParserFeatures & f.getMask()) != 0;
}
/*
/**********************************************************
/* Configuration, generator settings
/**********************************************************
*/
/**
* Method for enabling or disabling specified generator feature (check {@link
* SmileGenerator.Feature} for list of features)
*
* @since 1.2
*/
public final SmileFactory configure(SmileGenerator.Feature f, boolean state) {
if (state) {
enable(f);
} else {
disable(f);
}
return this;
}
/**
* Method for enabling specified generator features (check {@link SmileGenerator.Feature} for list
* of features)
*/
public SmileFactory enable(SmileGenerator.Feature f) {
_smileGeneratorFeatures |= f.getMask();
return this;
}
/**
* Method for disabling specified generator feature (check {@link SmileGenerator.Feature} for list
* of features)
*/
public SmileFactory disable(SmileGenerator.Feature f) {
_smileGeneratorFeatures &= ~f.getMask();
return this;
}
/** Check whether specified generator feature is enabled. */
public final boolean isEnabled(SmileGenerator.Feature f) {
return (_smileGeneratorFeatures & f.getMask()) != 0;
}
/*
/**********************************************************
/* Overridden parser factory methods, new (2.1)
/**********************************************************
*/
@Override
public SmileParser createParser(File f) throws IOException, JsonParseException {
return _createParser(new FileInputStream(f), _createContext(f, true));
}
@Override
public SmileParser createParser(URL url) throws IOException, JsonParseException {
return _createParser(_optimizedStreamFromURL(url), _createContext(url, true));
}
@Override
public SmileParser createParser(InputStream in) throws IOException, JsonParseException {
return _createParser(in, _createContext(in, false));
}
// public JsonParser createJsonParser(Reader r)
@Override
public SmileParser createParser(byte[] data) throws IOException, JsonParseException {
IOContext ctxt = _createContext(data, true);
return _createParser(data, 0, data.length, ctxt);
}
@Override
public SmileParser createParser(byte[] data, int offset, int len)
throws IOException, JsonParseException {
return _createParser(data, offset, len, _createContext(data, true));
}
/*
/**********************************************************
/* Overridden parser factory methods, old (pre-2.1)
/**********************************************************
*/
/**
* @deprecated Since 2.1 Use {@link #createParser(File)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileParser createJsonParser(File f) throws IOException, JsonParseException {
return _createParser(new FileInputStream(f), _createContext(f, true));
}
/**
* @deprecated Since 2.1 Use {@link #createParser(URL)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileParser createJsonParser(URL url) throws IOException, JsonParseException {
return _createParser(_optimizedStreamFromURL(url), _createContext(url, true));
}
/**
* @deprecated Since 2.1 Use {@link #createParser(InputStream)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileParser createJsonParser(InputStream in) throws IOException, JsonParseException {
return _createParser(in, _createContext(in, false));
}
// public JsonParser createJsonParser(Reader r)
/**
* @deprecated Since 2.1 Use {@link #createParser(byte[])} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileParser createJsonParser(byte[] data) throws IOException, JsonParseException {
IOContext ctxt = _createContext(data, true);
return _createParser(data, 0, data.length, ctxt);
}
/**
* @deprecated Since 2.1 Use {@link #createParser(byte[],int,int)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileParser createJsonParser(byte[] data, int offset, int len)
throws IOException, JsonParseException {
return _createParser(data, offset, len, _createContext(data, true));
}
/*
/**********************************************************
/* Overridden generator factory methods, new (2.1)
/**********************************************************
*/
/**
* Method for constructing {@link JsonGenerator} for generating Smile-encoded output.
*
* <p>Since Smile format always uses UTF-8 internally, <code>enc</code> argument is ignored.
*/
@Override
public SmileGenerator createGenerator(OutputStream out, JsonEncoding enc) throws IOException {
// false -> we won't manage the stream unless explicitly directed to
return _createGenerator(out, _createContext(out, false));
}
/**
* Method for constructing {@link JsonGenerator} for generating Smile-encoded output.
*
* <p>Since Smile format always uses UTF-8 internally, no encoding need to be passed to this
* method.
*/
@Override
public SmileGenerator createGenerator(OutputStream out) throws IOException {
// false -> we won't manage the stream unless explicitly directed to
return _createGenerator(out, _createContext(out, false));
}
/*
/**********************************************************
/* Overridden generator factory methods, old (pre-2.1)
/**********************************************************
*/
/**
* @deprecated Since 2.1 Use {@link #createGenerator(OutputStream)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileGenerator createJsonGenerator(OutputStream out, JsonEncoding enc) throws IOException {
// false -> we won't manage the stream unless explicitly directed to
return _createGenerator(out, _createContext(out, false));
}
/**
* @deprecated Since 2.1 Use {@link #createGenerator(OutputStream)} instead
* @since 2.1
*/
@Deprecated
@Override
public SmileGenerator createJsonGenerator(OutputStream out) throws IOException {
// false -> we won't manage the stream unless explicitly directed to
IOContext ctxt = _createContext(out, false);
return _createGenerator(out, ctxt);
}
@Deprecated
@Override
protected SmileGenerator _createUTF8JsonGenerator(OutputStream out, IOContext ctxt)
throws IOException {
return _createGenerator(out, ctxt);
}
/*
/******************************************************
/* Overridden internal factory methods
/******************************************************
*/
// protected IOContext _createContext(Object srcRef, boolean resourceManaged)
/** Overridable factory method that actually instantiates desired parser. */
@Override
protected SmileParser _createParser(InputStream in, IOContext ctxt)
throws IOException, JsonParseException {
return new SmileParserBootstrapper(ctxt, in)
.constructParser(
_parserFeatures,
_smileParserFeatures,
isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES),
_objectCodec,
_rootByteSymbols);
}
/** Overridable factory method that actually instantiates desired parser. */
@Override
protected JsonParser _createParser(Reader r, IOContext ctxt)
throws IOException, JsonParseException {
if (_cfgDelegateToTextual) {
return super._createParser(r, ctxt);
}
throw new UnsupportedOperationException("Can not create generator for non-byte-based target");
}
/** Overridable factory method that actually instantiates desired parser. */
@Override
protected SmileParser _createParser(byte[] data, int offset, int len, IOContext ctxt)
throws IOException, JsonParseException {
return new SmileParserBootstrapper(ctxt, data, offset, len)
.constructParser(
_parserFeatures,
_smileParserFeatures,
isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES),
_objectCodec,
_rootByteSymbols);
}
/** Overridable factory method that actually instantiates desired generator. */
@Override
protected JsonGenerator _createGenerator(Writer out, IOContext ctxt) throws IOException {
if (_cfgDelegateToTextual) {
return super._createGenerator(out, ctxt);
}
throw new UnsupportedOperationException("Can not create generator for non-byte-based target");
}
@Override
protected JsonGenerator _createUTF8Generator(OutputStream out, IOContext ctxt)
throws IOException {
return _createGenerator(out, ctxt);
}
// public BufferRecycler _getBufferRecycler()
@Override
protected Writer _createWriter(OutputStream out, JsonEncoding enc, IOContext ctxt)
throws IOException {
if (_cfgDelegateToTextual) {
return super._createWriter(out, enc, ctxt);
}
throw new UnsupportedOperationException("Can not create generator for non-byte-based target");
}
/*
/**********************************************************
/* Internal methods
/**********************************************************
*/
protected SmileGenerator _createGenerator(OutputStream out, IOContext ctxt) throws IOException {
int feats = _smileGeneratorFeatures;
/* One sanity check: MUST write header if shared string values setting is enabled,
* or quoting of binary data disabled.
* But should we force writing, or throw exception, if settings are in conflict?
* For now, let's error out...
*/
SmileGenerator gen = new SmileGenerator(ctxt, _generatorFeatures, feats, _objectCodec, out);
if ((feats & SmileGenerator.Feature.WRITE_HEADER.getMask()) != 0) {
gen.writeHeader();
} else {
if ((feats & SmileGenerator.Feature.CHECK_SHARED_STRING_VALUES.getMask()) != 0) {
throw new JsonGenerationException(
"Inconsistent settings: WRITE_HEADER disabled, but CHECK_SHARED_STRING_VALUES enabled; can not construct generator"
+ " due to possible data loss (either enable WRITE_HEADER, or disable CHECK_SHARED_STRING_VALUES to resolve)");
}
if ((feats & SmileGenerator.Feature.ENCODE_BINARY_AS_7BIT.getMask()) == 0) {
throw new JsonGenerationException(
"Inconsistent settings: WRITE_HEADER disabled, but ENCODE_BINARY_AS_7BIT disabled; can not construct generator"
+ " due to possible data loss (either enable WRITE_HEADER, or ENCODE_BINARY_AS_7BIT to resolve)");
}
}
return gen;
}
}
/**
* Method for disabling specified generator feature (check {@link SmileGenerator.Feature} for list
* of features)
*/
public SmileFactory disable(SmileGenerator.Feature f) {
_smileGeneratorFeatures &= ~f.getMask();
return this;
}
/** Check whether specified generator feature is enabled. */
public final boolean isEnabled(SmileGenerator.Feature f) {
return (_smileGeneratorFeatures & f.getMask()) != 0;
}
/**
* Method for enabling specified generator features (check {@link SmileGenerator.Feature} for list
* of features)
*/
public SmileFactory enable(SmileGenerator.Feature f) {
_smileGeneratorFeatures |= f.getMask();
return this;
}