/**
 * By default JSON output does only have escaping where it is strictly
 * necessary. This is recommended in the most cases. Nevertheless it can
 * be sometimes useful to have some more escaping.
 *
 * @param escapeCharacters an array which defines which characters should be
 *                         escaped and how it will be done. See
 *                         {@link CharacterEscapes}. In most cases this should
 *                         be null. Use like this:
 *                         <pre>{@code int[] esc = CharacterEscapes.standardAsciiEscapesForJSON();
 *                            // and force escaping of a few others:
 *                            esc['\''] = CharacterEscapes.ESCAPE_STANDARD;
 *                         JsonEncoder.useEscapeJavaScript(esc);
 *                         }</pre>
 */
public void setJavaScriptEscapeChars(final int[] escapeCharacters) {

    final CharacterEscapes ce = new CharacterEscapes() {

        private static final long serialVersionUID = 1L;

        @Override
        public int[] getEscapeCodesForAscii() {
            if (escapeCharacters == null) {
                return CharacterEscapes.standardAsciiEscapesForJSON();
            }
            return escapeCharacters;
        }

        @Override
        public SerializableString getEscapeSequence(final int ch) {
            final String jsEscaped = escapeChar((char) ch);
            return new SerializedString(jsEscaped);
        }

    };

    jsonGenerator.setCharacterEscapes(ce);
}
 

@Override
public int[] getEscapeCodesForAscii() {
  // add standard set of escaping characters
  int[] esc = CharacterEscapes.standardAsciiEscapesForJSON();
  // don't escape backslash (not to corrupt windows path)
  esc['\\'] = CharacterEscapes.ESCAPE_NONE;
  return esc;
}
 

private void _writeSegmentASCII(int end, final int maxNonEscaped)
		throws IOException, JsonGenerationException
{
	final int[] escCodes = _outputEscapes;
	final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);

	int ptr = 0;
	int escCode = 0;
	int start = ptr;

	output_loop:
	while (ptr < end) {
		// Fast loop for chars not needing escaping
		char c;
		while (true) {
			c = _outputBuffer[ptr];
			if (c < escLimit) {
				escCode = escCodes[c];
				if (escCode != 0) {
					break;
				}
			} else if (c > maxNonEscaped) {
				escCode = CharacterEscapes.ESCAPE_STANDARD;
				break;
			}
			if (++ptr >= end) {
				break;
			}
		}
		int flushLen = (ptr - start);
		if (flushLen > 0) {
			_writer.write(_outputBuffer, start, flushLen);
			if (ptr >= end) {
				break output_loop;
			}
		}
		++ptr;
		start = _prependOrWriteCharacterEscape(_outputBuffer, ptr, end, c, escCode);
	}
}
 

private void _writeStringASCII(final int len, final int maxNonEscaped)
		throws IOException, JsonGenerationException
{
	// And then we'll need to verify need for escaping etc:
	int end = _outputTail + len;
	final int[] escCodes = _outputEscapes;
	final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
	int escCode = 0;

	output_loop:
	while (_outputTail < end) {
		char c;
		// Fast loop for chars not needing escaping
		escape_loop:
		while (true) {
			c = _outputBuffer[_outputTail];
			if (c < escLimit) {
				escCode = escCodes[c];
				if (escCode != 0) {
					break escape_loop;
				}
			} else if (c > maxNonEscaped) {
				escCode = CharacterEscapes.ESCAPE_STANDARD;
				break escape_loop;
			}
			if (++_outputTail >= end) {
				break output_loop;
			}
		}
		int flushLen = (_outputTail - _outputHead);
		if (flushLen > 0) {
			_writer.write(_outputBuffer, _outputHead, flushLen);
		}
		++_outputTail;
		_prependOrWriteCharacterEscape(c, escCode);
	}
}
 

public GeneratorSettings(PrettyPrinter pp, FormatSchema sch,
        CharacterEscapes esc, SerializableString rootSep) {
    prettyPrinter = pp;
    schema = sch;
    characterEscapes = esc;
    rootValueSeparator = rootSep;
}
 

private void _writeStringASCII(final int len, final int maxNonEscaped)
    throws IOException, JsonGenerationException
{
    // And then we'll need to verify need for escaping etc:
    int end = _outputTail + len;
    final int[] escCodes = _outputEscapes;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
    int escCode = 0;
    
    output_loop:
    while (_outputTail < end) {
        char c;
        // Fast loop for chars not needing escaping
        escape_loop:
        while (true) {
            c = _outputBuffer[_outputTail];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break escape_loop;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break escape_loop;
            }
            if (++_outputTail >= end) {
                break output_loop;
            }
        }
        int flushLen = (_outputTail - _outputHead);
        if (flushLen > 0) {
            _writer.write(_outputBuffer, _outputHead, flushLen);
        }
        ++_outputTail;
        _prependOrWriteCharacterEscape(c, escCode);
    }
}
 

private void _writeSegmentASCII(int end, final int maxNonEscaped)
    throws IOException, JsonGenerationException
{
    final int[] escCodes = _outputEscapes;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);

    int ptr = 0;
    int escCode = 0;
    int start = ptr;

    output_loop:
    while (ptr < end) {
        // Fast loop for chars not needing escaping
        char c;
        while (true) {
            c = _outputBuffer[ptr];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break;
            }
            if (++ptr >= end) {
                break;
            }
        }
        int flushLen = (ptr - start);
        if (flushLen > 0) {
            _writer.write(_outputBuffer, start, flushLen);
            if (ptr >= end) {
                break output_loop;
            }
        }
        ++ptr;
        start = _prependOrWriteCharacterEscape(_outputBuffer, ptr, end, c, escCode);
    }
}
 

@Override
public JsonGenerator setCharacterEscapes(CharacterEscapes esc)
{
    _characterEscapes = esc;
    if (esc == null) { // revert to standard escapes
        _outputEscapes = sOutputEscapes;
    } else {
        _outputEscapes = esc.getEscapeCodesForAscii();
    }
    return this;
}
 

@Override
public int[] getEscapeCodesForAscii() {
  int[] escapes = CharacterEscapes.standardAsciiEscapesForJSON();
  // From
  // https://github.com/google/gson/blob/bac26b8e429150d4cbf807e8692f207b7ce7d40d/gson/src/main/java/com/google/gson/stream/JsonWriter.java#L158
  escapes['<'] = CharacterEscapes.ESCAPE_CUSTOM;
  escapes['>'] = CharacterEscapes.ESCAPE_CUSTOM;
  escapes['&'] = CharacterEscapes.ESCAPE_STANDARD;
  escapes['='] = CharacterEscapes.ESCAPE_STANDARD;
  escapes['\''] = CharacterEscapes.ESCAPE_STANDARD;
  return escapes;
}
 

public HTMLCharacterEscapes() {
    asciiEscapes = CharacterEscapes.standardAsciiEscapesForJSON();
    asciiEscapes['<'] = CharacterEscapes.ESCAPE_CUSTOM;
    asciiEscapes['>'] = CharacterEscapes.ESCAPE_CUSTOM;
    asciiEscapes['&'] = CharacterEscapes.ESCAPE_CUSTOM;
    asciiEscapes['"'] = CharacterEscapes.ESCAPE_CUSTOM;
    asciiEscapes['\''] = CharacterEscapes.ESCAPE_CUSTOM;
}
 

@Override
public JsonGenerator setCharacterEscapes(CharacterEscapes esc)
{
    _characterEscapes = esc;
    if (esc == null) { // revert to standard escapes
        _outputEscapes = sOutputEscapes;
    } else {
        _outputEscapes = esc.getEscapeCodesForAscii();
    }
    return this;
}
 

private void _writeSegmentCustom(int end)
		throws IOException, JsonGenerationException
{
	final int[] escCodes = _outputEscapes;
	final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
	final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
	final CharacterEscapes customEscapes = _characterEscapes;

	int ptr = 0;
	int escCode = 0;
	int start = ptr;

	output_loop:
	while (ptr < end) {
		// Fast loop for chars not needing escaping
		char c;
		while (true) {
			c = _outputBuffer[ptr];
			if (c < escLimit) {
				escCode = escCodes[c];
				if (escCode != 0) {
					break;
				}
			} else if (c > maxNonEscaped) {
				escCode = CharacterEscapes.ESCAPE_STANDARD;
				break;
			} else {
				if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
					escCode = CharacterEscapes.ESCAPE_CUSTOM;
					break;
				}
			}
			if (++ptr >= end) {
				break;
			}
		}
		int flushLen = (ptr - start);
		if (flushLen > 0) {
			_writer.write(_outputBuffer, start, flushLen);
			if (ptr >= end) {
				break output_loop;
			}
		}
		++ptr;
		start = _prependOrWriteCharacterEscape(_outputBuffer, ptr, end, c, escCode);
	}
}
 

private void _writeStringCustom(final int len)
		throws IOException, JsonGenerationException
{
	// And then we'll need to verify need for escaping etc:
	int end = _outputTail + len;
	final int[] escCodes = _outputEscapes;
	final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
	final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
	int escCode = 0;
	final CharacterEscapes customEscapes = _characterEscapes;

	output_loop:
	while (_outputTail < end) {
		char c;
		// Fast loop for chars not needing escaping
		escape_loop:
		while (true) {
			c = _outputBuffer[_outputTail];
			if (c < escLimit) {
				escCode = escCodes[c];
				if (escCode != 0) {
					break escape_loop;
				}
			} else if (c > maxNonEscaped) {
				escCode = CharacterEscapes.ESCAPE_STANDARD;
				break escape_loop;
			} else {
				if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
					escCode = CharacterEscapes.ESCAPE_CUSTOM;
					break escape_loop;
				}
			}
			if (++_outputTail >= end) {
				break output_loop;
			}
		}
		int flushLen = (_outputTail - _outputHead);
		if (flushLen > 0) {
			_writer.write(_outputBuffer, _outputHead, flushLen);
		}
		++_outputTail;
		_prependOrWriteCharacterEscape(c, escCode);
	}
}
 

private void _writeStringCustom(char[] text, int offset, int len)
		throws IOException, JsonGenerationException
{
	len += offset; // -> len marks the end from now on
	final int[] escCodes = _outputEscapes;
	final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
	final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
	final CharacterEscapes customEscapes = _characterEscapes;

	int escCode = 0;

	while (offset < len) {
		int start = offset;
		char c;

		while (true) {
			c = text[offset];
			if (c < escLimit) {
				escCode = escCodes[c];
				if (escCode != 0) {
					break;
				}
			} else if (c > maxNonEscaped) {
				escCode = CharacterEscapes.ESCAPE_STANDARD;
				break;
			} else {
				if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
					escCode = CharacterEscapes.ESCAPE_CUSTOM;
					break;
				}
			}
			if (++offset >= len) {
				break;
			}
		}

		// Short span? Better just copy it to buffer first:
		int newAmount = offset - start;
		if (newAmount < SHORT_WRITE) {
			// Note: let's reserve room for escaped char (up to 6 chars)
			if ((_outputTail + newAmount) > _outputEnd) {
				_flushBuffer();
			}
			if (newAmount > 0) {
				System.arraycopy(text, start, _outputBuffer, _outputTail, newAmount);
				_outputTail += newAmount;
			}
		} else { // Nope: better just write through
			_flushBuffer();
			_writer.write(text, start, newAmount);
		}
		// Was this the end?
		if (offset >= len) { // yup
			break;
		}
		// Nope, need to escape the char.
		++offset;
		_appendCharacterEscape(c, escCode);
	}
}
 

/**
 * Method called to append escape sequence for given character, at the
 * end of standard output buffer; or if not possible, write out directly.
 */
private void _appendCharacterEscape(char ch, int escCode)
		throws IOException, JsonGenerationException
{
	if (escCode >= 0) { // \\N (2 char)
		if ((_outputTail + 2) > _outputEnd) {
			_flushBuffer();
		}
		_outputBuffer[_outputTail++] = '\\';
		_outputBuffer[_outputTail++] = (char) escCode;
		return;
	}
	if (escCode != CharacterEscapes.ESCAPE_CUSTOM) { // std, \\uXXXX
		if ((_outputTail + 5) >= _outputEnd) {
			_flushBuffer();
		}
		int ptr = _outputTail;
		char[] buf = _outputBuffer;
		buf[ptr++] = '\\';
		buf[ptr++] = 'u';
		// We know it's a control char, so only the last 2 chars are non-0
		if (ch > 0xFF) { // beyond 8 bytes
			int hi = (ch >> 8) & 0xFF;
			buf[ptr++] = HEX_CHARS[hi >> 4];
			buf[ptr++] = HEX_CHARS[hi & 0xF];
			ch &= 0xFF;
		} else {
			buf[ptr++] = '0';
			buf[ptr++] = '0';
		}
		buf[ptr++] = HEX_CHARS[ch >> 4];
		buf[ptr++] = HEX_CHARS[ch & 0xF];
		_outputTail = ptr;
		return;
	}
	String escape;
	if (_currentEscape == null) {
		escape = _characterEscapes.getEscapeSequence(ch).getValue();
	} else {
		escape = _currentEscape.getValue();
		_currentEscape = null;
	}
	int len = escape.length();
	if ((_outputTail + len) > _outputEnd) {
		_flushBuffer();
		if (len > _outputEnd) { // very very long escape; unlikely but theoretically possible
			_writer.write(escape);
			return;
		}
	}
	escape.getChars(0, len, _outputBuffer, _outputTail);
	_outputTail += len;
}
 

/**
 * @since 2.3
 */
public ObjectWriter with(CharacterEscapes escapes) {
    return _new(_generatorSettings.with(escapes), _prefetch);
}
 

public GeneratorSettings with(CharacterEscapes esc) {
    return (characterEscapes == esc) ? this
            : new GeneratorSettings(prettyPrinter, schema, esc, rootValueSeparator);
}
 

private void _writeStringASCII(char[] text, int offset, int len,
        final int maxNonEscaped)
    throws IOException, JsonGenerationException
{
    len += offset; // -> len marks the end from now on
    final int[] escCodes = _outputEscapes;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);

    int escCode = 0;
    
    while (offset < len) {
        int start = offset;
        char c;
        
        while (true) {
            c = text[offset];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break;
            }
            if (++offset >= len) {
                break;
            }
        }

        // Short span? Better just copy it to buffer first:
        int newAmount = offset - start;
        if (newAmount < SHORT_WRITE) {
            // Note: let's reserve room for escaped char (up to 6 chars)
            if ((_outputTail + newAmount) > _outputEnd) {
                _flushBuffer();
            }
            if (newAmount > 0) {
                System.arraycopy(text, start, _outputBuffer, _outputTail, newAmount);
                _outputTail += newAmount;
            }
        } else { // Nope: better just write through
            _flushBuffer();
            _writer.write(text, start, newAmount);
        }
        // Was this the end?
        if (offset >= len) { // yup
            break;
        }
        // Nope, need to escape the char.
        ++offset;
        _appendCharacterEscape(c, escCode);
    }
}
 

private void _writeStringCustom(final int len)
    throws IOException, JsonGenerationException
{
    // And then we'll need to verify need for escaping etc:
    int end = _outputTail + len;
    final int[] escCodes = _outputEscapes;
    final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
    int escCode = 0;
    final CharacterEscapes customEscapes = _characterEscapes;

    output_loop:
    while (_outputTail < end) {
        char c;
        // Fast loop for chars not needing escaping
        escape_loop:
        while (true) {
            c = _outputBuffer[_outputTail];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break escape_loop;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break escape_loop;
            } else {
                if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
                    escCode = CharacterEscapes.ESCAPE_CUSTOM;
                    break escape_loop;
                }
            }
            if (++_outputTail >= end) {
                break output_loop;
            }
        }
        int flushLen = (_outputTail - _outputHead);
        if (flushLen > 0) {
            _writer.write(_outputBuffer, _outputHead, flushLen);
        }
        ++_outputTail;
        _prependOrWriteCharacterEscape(c, escCode);
    }
}
 

private void _writeSegmentCustom(int end)
    throws IOException, JsonGenerationException
{
    final int[] escCodes = _outputEscapes;
    final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
    final CharacterEscapes customEscapes = _characterEscapes;

    int ptr = 0;
    int escCode = 0;
    int start = ptr;

    output_loop:
    while (ptr < end) {
        // Fast loop for chars not needing escaping
        char c;
        while (true) {
            c = _outputBuffer[ptr];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break;
            } else {
                if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
                    escCode = CharacterEscapes.ESCAPE_CUSTOM;
                    break;
                }
            }
            if (++ptr >= end) {
                break;
            }
        }
        int flushLen = (ptr - start);
        if (flushLen > 0) {
            _writer.write(_outputBuffer, start, flushLen);
            if (ptr >= end) {
                break output_loop;
            }
        }
        ++ptr;
        start = _prependOrWriteCharacterEscape(_outputBuffer, ptr, end, c, escCode);
    }
}
 

private void _writeStringCustom(char[] text, int offset, int len)
    throws IOException, JsonGenerationException
{
    len += offset; // -> len marks the end from now on
    final int[] escCodes = _outputEscapes;
    final int maxNonEscaped = (_maximumNonEscapedChar < 1) ? 0xFFFF : _maximumNonEscapedChar;
    final int escLimit = Math.min(escCodes.length, maxNonEscaped+1);
    final CharacterEscapes customEscapes = _characterEscapes;

    int escCode = 0;
    
    while (offset < len) {
        int start = offset;
        char c;
        
        while (true) {
            c = text[offset];
            if (c < escLimit) {
                escCode = escCodes[c];
                if (escCode != 0) {
                    break;
                }
            } else if (c > maxNonEscaped) {
                escCode = CharacterEscapes.ESCAPE_STANDARD;
                break;
            } else {
                if ((_currentEscape = customEscapes.getEscapeSequence(c)) != null) {
                    escCode = CharacterEscapes.ESCAPE_CUSTOM;
                    break;
                }
            }
            if (++offset >= len) {
                break;
            }
        }

        // Short span? Better just copy it to buffer first:
        int newAmount = offset - start;
        if (newAmount < SHORT_WRITE) {
            // Note: let's reserve room for escaped char (up to 6 chars)
            if ((_outputTail + newAmount) > _outputEnd) {
                _flushBuffer();
            }
            if (newAmount > 0) {
                System.arraycopy(text, start, _outputBuffer, _outputTail, newAmount);
                _outputTail += newAmount;
            }
        } else { // Nope: better just write through
            _flushBuffer();
            _writer.write(text, start, newAmount);
        }
        // Was this the end?
        if (offset >= len) { // yup
            break;
        }
        // Nope, need to escape the char.
        ++offset;
        _appendCharacterEscape(c, escCode);
    }
}
 

/**
 * Method called to append escape sequence for given character, at the
 * end of standard output buffer; or if not possible, write out directly.
 */
private void _appendCharacterEscape(char ch, int escCode)
    throws IOException, JsonGenerationException
{
    if (escCode >= 0) { // \\N (2 char)
        if ((_outputTail + 2) > _outputEnd) {
            _flushBuffer();
        }
        _outputBuffer[_outputTail++] = '\\';
        _outputBuffer[_outputTail++] = (char) escCode;
        return;
    }
    if (escCode != CharacterEscapes.ESCAPE_CUSTOM) { // std, \\uXXXX
        if ((_outputTail + 5) >= _outputEnd) {
            _flushBuffer();
        }
        int ptr = _outputTail;
        char[] buf = _outputBuffer;
        buf[ptr++] = '\\';
        buf[ptr++] = 'u';
        // We know it's a control char, so only the last 2 chars are non-0
        if (ch > 0xFF) { // beyond 8 bytes
            int hi = (ch >> 8) & 0xFF;
            buf[ptr++] = HEX_CHARS[hi >> 4];
            buf[ptr++] = HEX_CHARS[hi & 0xF];
            ch &= 0xFF;
        } else {
            buf[ptr++] = '0';
            buf[ptr++] = '0';
        }
        buf[ptr++] = HEX_CHARS[ch >> 4];
        buf[ptr++] = HEX_CHARS[ch & 0xF];
        _outputTail = ptr;
        return;
    }
    String escape;
    if (_currentEscape == null) {
        escape = _characterEscapes.getEscapeSequence(ch).getValue();
    } else {
        escape = _currentEscape.getValue();
        _currentEscape = null;
    }
    int len = escape.length();
    if ((_outputTail + len) > _outputEnd) {
        _flushBuffer();
        if (len > _outputEnd) { // very very long escape; unlikely but theoretically possible
            _writer.write(escape);
            return;
        }
    }
    escape.getChars(0, len, _outputBuffer, _outputTail);
    _outputTail += len;
}
 

/**
 * Method for accessing custom escapes factory uses for {@link JsonGenerator}s
 * it creates.
 */
@Override
public CharacterEscapes getCharacterEscapes() {
    return _characterEscapes;
}
 

@Override
public CharacterEscapes getCharacterEscapes() {  return delegate.getCharacterEscapes(); }
 

@Override
public JsonGenerator setCharacterEscapes(CharacterEscapes esc) { delegate.setCharacterEscapes(esc);
    return this; }
 

/**
 * Method for accessing custom escapes factory uses for {@link JsonGenerator}s
 * it creates.
 */
@Override
public CharacterEscapes getCharacterEscapes() {
    return _characterEscapes;
}
 

@Override
public CharacterEscapes getCharacterEscapes() {  return delegate.getCharacterEscapes(); }
 

@Override
public JsonGenerator setCharacterEscapes(CharacterEscapes esc) { delegate.setCharacterEscapes(esc);
    return this; }
 

public JacksonService() {

		// fun Jackson API with circular dependencies ... so we create a mapper
		// first, and grab implicitly created factory from it
		this.sharedMapper = new ObjectMapper();
		this.sharedFactory = sharedMapper.getFactory();

		final SerializableString LINE_SEPARATOR = new SerializedString("\\u2028");
		final SerializableString PARAGRAPH_SEPARATOR = new SerializedString("\\u2029");

		this.sharedFactory.setCharacterEscapes(new CharacterEscapes() {

			private static final long serialVersionUID = 3995801066651016289L;

			@Override
			public int[] getEscapeCodesForAscii() {
				return standardAsciiEscapesForJSON();
			}

			@Override
			public SerializableString getEscapeSequence(int ch) {
				// see ECMA-262 Section 7.3;
				// in most cases our client is browser,
				// and JSON is parsed into JS;
				// therefore these two whitespace characters,
				// which are perfectly valid in JSON but invalid in JS strings,
				// need to be escaped...
				switch (ch) {
				case '\u2028':
					return LINE_SEPARATOR;
				case '\u2029':
					return PARAGRAPH_SEPARATOR;
				default:
					return null;
				}
			}
		});

		// make sure mapper does not attempt closing streams it does not
		// manage... why is this even a default in jackson?
		sharedFactory.disable(Feature.AUTO_CLOSE_TARGET);

		// do not flush every time. why would we want to do that?
		// this is having a HUGE impact on extrest serializers (5x speedup)
		sharedMapper.disable(SerializationFeature.FLUSH_AFTER_WRITE_VALUE);
	}
 

@Override
public CharacterEscapes getCharacterEscapes() {
    return null;
}