@Override
	public char getChar(int index) {
		String value = readAndTrim(index);
		if (value != null) {
			Assert.isTrue(value.length() == 1, "Cannot convert field value '" + value + "' to char.");
			return value.charAt(0);
		}
		return '\u0000';

	}
@param index the index of the value
@return the converted raw value, trimmed
spring-xd-tuple/src/main/java/org/springframework/xd/tuple/DefaultTuple.java