private void updateIndexesToWrite()

in src/main/java/com/univocity/parsers/common/AbstractWriter.java [225:267]
43 lines of code
13 McCabe index (conditional complexity)

	private void updateIndexesToWrite(CommonSettings<?> settings) {
		FieldSelector selector = settings.getFieldSelector();
		if (selector != null) {
			if (headers != null && headers.length > 0) {
				indexesToWrite = selector.getFieldIndexes(headers);
				if (columnReorderingEnabled) { //column reordering enabled?
					outputRow = new Object[indexesToWrite.length];
				} else {
					outputRow = new Object[headers.length];
				}
			} else if (!(selector instanceof FieldNameSelector) && !(selector instanceof ExcludeFieldNameSelector)) {
				int rowLength = largestRowLength;
				if ((selector instanceof FieldIndexSelector)) {
					boolean gotLengthFromSelection = false;
					for (Integer index : ((FieldIndexSelector) selector).get()) {
						if (rowLength <= index) {
							rowLength = index;
							gotLengthFromSelection = true;
						}
					}
					if (gotLengthFromSelection) {
						rowLength++;
					}
					if (rowLength < largestRowLength) {
						rowLength = largestRowLength;
					}
				} else {
					rowLength = settings.getMaxColumns();
				}
				indexesToWrite = selector.getFieldIndexes(new String[rowLength]); //generates a dummy header array - only the indexes matter so we are good
				if (columnReorderingEnabled) { //column reordering enabled?
					outputRow = new Object[indexesToWrite.length];
				} else {
					outputRow = new Object[rowLength];
				}
			} else {
				throw new IllegalStateException("Cannot select fields by name with no headers defined");
			}
		} else {
			outputRow = null;
			indexesToWrite = null;
		}
	}