INNER CODE UNIT · Java

TickerCharacterList

robinhood/ticker · ticker/src/main/java/com/robinhood/ticker/TickerCharacterList.java:34

class TickerCharacterList {
    private final int numOriginalCharacters;
    // The saved character list will always be of the format: EMPTY, list, list
    private final char[] characterList;
    // A minor optimization so that we can cache the indices of each character.
    private final Map<Character, Integer> characterIndicesMap;

    TickerCharacterList(String characterList) {
        if (characterList.contains(Character.toString(TickerUtils.EMPTY_CHAR))) {
            throw new IllegalArgumentException(
                    "You cannot include TickerUtils.EMPTY_CHAR in the character list.");
        }

        final char[] charsArray = characterList.toCharArray();
        final int length = charsArray.length;
        this.numOriginalCharacters = length;

        characterIndicesMap = new HashMap<>(length);

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