private void deleteMatchStep()

in src/main/software/amazon/event/ruler/ByteMachine.java [199:229]
25 lines of code
9 McCabe index (conditional complexity)

    private void deleteMatchStep(ByteState byteState, int charIndex, Patterns pattern,
                                 final InputCharacter[] characters) {
        final InputCharacter currentChar = characters[charIndex];
        final ByteTransition trans = getTransition(byteState, currentChar);

        for (SingleByteTransition eachTrans : trans.expand()) {
            if (charIndex < characters.length - 1) {
                // if it is shortcut trans, we delete it directly.
                if (eachTrans.isShortcutTrans()) {
                    deleteMatch(currentChar, byteState, pattern, eachTrans);
                } else {
                    ByteState nextByteState = eachTrans.getNextByteState();
                    if (nextByteState != null && nextByteState != byteState) {
                        deleteMatchStep(nextByteState, charIndex + 1, pattern, characters);
                    }

                    // Perform handling for certain wildcard cases.
                    eachTrans = deleteMatchStepForWildcard(byteState, charIndex, pattern, characters, eachTrans,
                            nextByteState);

                    if (nextByteState != null &&
                            (nextByteState.hasNoTransitions() || nextByteState.hasOnlySelfReferentialTransition())) {
                        // The transition's next state has no meaningful transitions, so compact the transition.
                        putTransitionNextState(byteState, currentChar, eachTrans, null);
                    }
                }
            } else {
                deleteMatch(currentChar, byteState, pattern, eachTrans);
            }
        }
    }