/**
* Quote text contents using JSON standard quoting, and append results to a supplied {@link
* StringBuilder}.
*/
public static void quoteAsString(final CharSequence input, final StringBuilder output) {
final char[] qbuf = getQBuf();
final int[] escCodes = CharTypes.get7BitOutputEscapes();
final int escCodeCount = escCodes.length;
int inPtr = 0;
final int inputLen = input.length();
outer:
while (inPtr < inputLen) {
tight_loop:
while (true) {
final char c = input.charAt(inPtr);
if (c < escCodeCount && escCodes[c] != 0) {
break tight_loop;
}
output.append(c);
if (++inPtr >= inputLen) {
break outer;
}
}
// something to escape; 2 or 6-char variant?
final char d = input.charAt(inPtr++);
final int escCode = escCodes[d];
final int length = (escCode < 0) ? _appendNumeric(d, qbuf) : _appendNamed(escCode, qbuf);
output.append(qbuf, 0, length);
}
}
protected static void appendQuoted(StringBuilder stringbuilder, String s) {
stringbuilder.append('"');
CharTypes.appendQuoted(stringbuilder, s);
stringbuilder.append('"');
}
/** This class is borrowed from <a href="https://github.com/FasterXML/jackson-core">Jackson</a>. */
public final class JsonUtils {
private static final char[] HC = CharTypes.copyHexChars();
/** Temporary buffer used for composing quote/escape sequences */
private static final ThreadLocal<char[]> _qbufLocal = new ThreadLocal<>();
private static char[] getQBuf() {
char[] _qbuf = _qbufLocal.get();
if (_qbuf == null) {
_qbuf = new char[6];
_qbuf[0] = '\\';
_qbuf[2] = '0';
_qbuf[3] = '0';
_qbufLocal.set(_qbuf);
}
return _qbuf;
}
/**
* Quote text contents using JSON standard quoting, and append results to a supplied {@link
* StringBuilder}.
*/
public static void quoteAsString(final CharSequence input, final StringBuilder output) {
final char[] qbuf = getQBuf();
final int[] escCodes = CharTypes.get7BitOutputEscapes();
final int escCodeCount = escCodes.length;
int inPtr = 0;
final int inputLen = input.length();
outer:
while (inPtr < inputLen) {
tight_loop:
while (true) {
final char c = input.charAt(inPtr);
if (c < escCodeCount && escCodes[c] != 0) {
break tight_loop;
}
output.append(c);
if (++inPtr >= inputLen) {
break outer;
}
}
// something to escape; 2 or 6-char variant?
final char d = input.charAt(inPtr++);
final int escCode = escCodes[d];
final int length = (escCode < 0) ? _appendNumeric(d, qbuf) : _appendNamed(escCode, qbuf);
output.append(qbuf, 0, length);
}
}
private static int _appendNumeric(final int value, final char[] qbuf) {
qbuf[1] = 'u';
// We know it's a control char, so only the last 2 chars are non-0
qbuf[4] = HC[value >> 4];
qbuf[5] = HC[value & 0xF];
return 6;
}
private static int _appendNamed(final int esc, final char[] qbuf) {
qbuf[1] = (char) esc;
return 2;
}
}
/**
* Intermediate base class shared by JSON-backed generators like {@link UTF8JsonGenerator} and
* {@link WriterBasedJsonGenerator}.
*
* @since 2.1
*/
public abstract class JsonGeneratorImpl extends GeneratorBase {
/*
/**********************************************************
/* Constants
/**********************************************************
*/
/**
* This is the default set of escape codes, over 7-bit ASCII range (first 128 character codes),
* used for single-byte UTF-8 characters.
*/
protected static final int[] sOutputEscapes = CharTypes.get7BitOutputEscapes();
/*
/**********************************************************
/* Configuration, basic I/O
/**********************************************************
*/
protected final IOContext _ioContext;
/*
/**********************************************************
/* Configuration, output escaping
/**********************************************************
*/
/**
* Currently active set of output escape code definitions (whether and how to escape or not) for
* 7-bit ASCII range (first 128 character codes). Defined separately to make potentially
* customizable
*/
protected int[] _outputEscapes = sOutputEscapes;
/**
* Value between 128 (0x80) and 65535 (0xFFFF) that indicates highest Unicode code point that will
* not need escaping; or 0 to indicate that all characters can be represented without escaping.
* Typically used to force escaping of some portion of character set; for example to always escape
* non-ASCII characters (if value was 127).
*
* <p>NOTE: not all sub-classes make use of this setting.
*/
protected int _maximumNonEscapedChar;
/**
* 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;
/*
/**********************************************************
/* Configuration, other
/**********************************************************
*/
/**
* Separator to use, if any, between root-level values.
*
* @since 2.1
*/
protected SerializableString _rootValueSeparator =
DefaultPrettyPrinter.DEFAULT_ROOT_VALUE_SEPARATOR;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public JsonGeneratorImpl(IOContext ctxt, int features, ObjectCodec codec) {
super(features, codec);
_ioContext = ctxt;
if (isEnabled(Feature.ESCAPE_NON_ASCII)) {
setHighestNonEscapedChar(127);
}
}
/*
/**********************************************************
/* Overridden configuration methods
/**********************************************************
*/
@Override
public JsonGenerator setHighestNonEscapedChar(int charCode) {
_maximumNonEscapedChar = (charCode < 0) ? 0 : charCode;
return this;
}
@Override
public int getHighestEscapedChar() {
return _maximumNonEscapedChar;
}
@Override
public JsonGenerator setCharacterEscapes(CharacterEscapes esc) {
_characterEscapes = esc;
if (esc == null) { // revert to standard escapes
_outputEscapes = sOutputEscapes;
} else {
_outputEscapes = esc.getEscapeCodesForAscii();
}
return this;
}
/** Method for accessing custom escapes factory uses for {@link JsonGenerator}s it creates. */
@Override
public CharacterEscapes getCharacterEscapes() {
return _characterEscapes;
}
@Override
public JsonGenerator setRootValueSeparator(SerializableString sep) {
_rootValueSeparator = sep;
return this;
}
/*
/**********************************************************
/* Versioned
/**********************************************************
*/
@Override
public Version version() {
return VersionUtil.versionFor(getClass());
}
/*
/**********************************************************
/* Partial API
/**********************************************************
*/
// // Overrides just to make things final, to possibly help with inlining
@Override
public final void writeStringField(String fieldName, String value)
throws IOException, JsonGenerationException {
writeFieldName(fieldName);
writeString(value);
}
}
