public static String toEscapedUnicode()

in wicket-util/src/main/java/org/apache/wicket/util/string/Strings.java [996:1074]
77 lines of code
19 McCabe index (conditional complexity)

	public static String toEscapedUnicode(final String unicodeString)
	{
		if (unicodeString == null || unicodeString.isEmpty())
		{
			return unicodeString;
		}
		int len = unicodeString.length();
		int bufLen = len * 2;
		StringBuilder outBuffer = new StringBuilder(bufLen);
		for (int x = 0; x < len; x++)
		{
			char aChar = unicodeString.charAt(x);
			if (Character.getType(aChar) == Character.UNASSIGNED)
			{
				continue;
			}
			// Handle common case first, selecting largest block that
			// avoids the specials below
			if ((aChar > 61) && (aChar < 127))
			{
				if (aChar == '\\')
				{
					outBuffer.append('\\');
					outBuffer.append('\\');
					continue;
				}
				outBuffer.append(aChar);
				continue;
			}
			switch (aChar)
			{
				case ' ' :
					if (x == 0)
					{
						outBuffer.append('\\');
					}
					outBuffer.append(' ');
					break;
				case '\t' :
					outBuffer.append('\\');
					outBuffer.append('t');
					break;
				case '\n' :
					outBuffer.append('\\');
					outBuffer.append('n');
					break;
				case '\r' :
					outBuffer.append('\\');
					outBuffer.append('r');
					break;
				case '\f' :
					outBuffer.append('\\');
					outBuffer.append('f');
					break;
				case '=' : // Fall through
				case ':' : // Fall through
				case '#' : // Fall through
				case '!' :
					outBuffer.append('\\');
					outBuffer.append(aChar);
					break;
				default :
					if ((aChar < 0x0020) || (aChar > 0x007e))
					{
						outBuffer.append('\\');
						outBuffer.append('u');
						outBuffer.append(toHex((aChar >> 12) & 0xF));
						outBuffer.append(toHex((aChar >> 8) & 0xF));
						outBuffer.append(toHex((aChar >> 4) & 0xF));
						outBuffer.append(toHex(aChar & 0xF));
					}
					else
					{
						outBuffer.append(aChar);
					}
			}
		}
		return outBuffer.toString();
	}