public String render()

in fop-core/src/main/java/org/apache/fop/complexscripts/scripts/KhmerRenderer.java [209:371]
131 lines of code
43 McCabe index (conditional complexity)

    public String render(final String strInput) {
        //Given an input String of unicode cluster to reorder.
        //The return is the visual based cluster (legacy style) String.

        int cursor = 0;
        short state = 0;
        int charCount = strInput.length();
        StringBuilder result = new StringBuilder();

        while (cursor < charCount) {
            String reserved = "";
            String signAbove = "";
            String signAfter = "";
            String base = "";
            String robat = "";
            String shifter = "";
            String vowelBefore = "";
            String vowelBelow = "";
            String vowelAbove = "";
            String vowelAfter = "";
            boolean coeng = false;
            String cluster;

            String coeng1 = "";
            String coeng2 = "";

            boolean shifterAfterCoeng = false;

            while (cursor < charCount) {
                char curChar = strInput.charAt(cursor);
                int kChar = getCharClass(curChar);
                int charClass = kChar & CF_CLASS_MASK;
                try {
                    state = khmerStateTable[state][charClass];
                } catch (Exception ex) {
                    state = -1;
                }

                if (state < 0) {
                    break;
                }

                //collect variable for cluster here

                if (kChar == XX) {
                    reserved = Character.toString(curChar);
                } else if (kChar == SA) { //Sign placed above the base
                    signAbove = Character.toString(curChar);
                } else if (kChar == SP) { //Sign placed after the base
                    signAfter = Character.toString(curChar);
                } else if (kChar == C1 || kChar == C2 || kChar == C3) { //Consonant
                    if (coeng) {
                        if ("".equalsIgnoreCase(coeng1)) {
                            coeng1 = Character.toString(COENG).concat(Character.toString(curChar));
                        } else {
                            coeng2 = Character.toString(COENG).concat(Character.toString(curChar));
                        }
                        coeng = false;
                    } else {
                        base = Character.toString(curChar);
                    }
                } else if (kChar == RB) { //Khmer sign robat u17CC
                    robat = Character.toString(curChar);
                } else if (kChar == CS) { //Consonant-shifter
                    if (!"".equalsIgnoreCase(coeng1)) {
                        shifterAfterCoeng = true;
                    }

                    shifter = Character.toString(curChar);
                } else if (kChar == DL) { //Dependent vowel placed before the base
                    vowelBefore = Character.toString(curChar);
                } else if (kChar == DB) { //Dependent vowel placed below the base
                    vowelBelow = Character.toString(curChar);
                } else if (kChar == DA) { //Dependent vowel placed above the base
                    vowelAbove = Character.toString(curChar);
                } else if (kChar == DR) { //Dependent vowel placed behind the base
                    vowelAfter = Character.toString(curChar);
                } else if (kChar == CO) { //Khmer combining mark COENG
                    coeng = true;
                } else if (kChar == VA) { //Khmer split vowel, see da
                    vowelBefore = Character.toString(SRAE);
                    vowelAbove = Character.toString(strEcombining(curChar));
                } else if (kChar == VR) { //Khmer split vowel, see dr
                    vowelBefore = Character.toString(SRAE);
                    vowelAfter = Character.toString(strEcombining(curChar));
                }

                cursor += 1;
            }
            // end of while (a cluster has found)

            // logic when cluster has coeng
            // should coeng be located on left side
            String coengBefore = "";
            if (CORO.equalsIgnoreCase(coeng1)) {
                coengBefore = coeng1;
                coeng1 = "";
            } else if (CORO.equalsIgnoreCase(coeng2)) {
                coengBefore = coeng2;
                coeng2 = "";
            }

            //logic of shifter with base character
            if (!"".equalsIgnoreCase(base) && !"".equalsIgnoreCase(shifter)) {
                if (!"".equalsIgnoreCase(vowelAbove)) {
                    shifter = "";
                    vowelBelow = Character.toString(SRAU);
                }
            }

            // uncomplete coeng
            if (coeng && "".equalsIgnoreCase(coeng1)) {
                coeng1 = Character.toString(COENG);
            } else if (coeng && "".equalsIgnoreCase(coeng2)) {
                coeng2 = Character.toString(MARK).concat(Character.toString(COENG));
            }

            //place of shifter
            String shifter1 = "";
            String shifter2 = "";

            if (shifterAfterCoeng) {
                shifter2 = shifter;
            } else {
                shifter1 = shifter;
            }

            boolean specialCaseBA = false;
            String strMARKSRAAA = Character.toString(MARK).concat(Character.toString(SRAAA));
            String strMARKSRAAU = Character.toString(MARK).concat(Character.toString(SRAAU));

            if (Character.toString(BA).equalsIgnoreCase(base)
                    && (Character.toString(SRAAA).equalsIgnoreCase(vowelAfter)
                    || Character.toString(SRAAU).equalsIgnoreCase(vowelAfter)
                    || strMARKSRAAA.equalsIgnoreCase(vowelAfter) || strMARKSRAAU.equalsIgnoreCase(vowelAfter))) {
                specialCaseBA = true;

                if (!"".equalsIgnoreCase(coeng1)) {
                    String coeng1Complete = coeng1.substring(0, coeng1.length() - 1);
                    if (Character.toString(BA).equalsIgnoreCase(coeng1Complete)
                            || Character.toString(YO).equalsIgnoreCase(coeng1Complete)
                            || Character.toString(SA_C).equalsIgnoreCase(coeng1Complete)) {
                        specialCaseBA = false;

                    }
                }
            }

            // cluster formation
            if (specialCaseBA) {
                cluster = vowelBefore + coengBefore + base + vowelAfter + robat + shifter1 + coeng1 + coeng2
                        + shifter2 + vowelBelow + vowelAbove + signAbove + signAfter;
            } else {
                cluster = vowelBefore + coengBefore + base + robat + shifter1 + coeng1 + coeng2 + shifter2
                        + vowelBelow + vowelAbove + vowelAfter + signAbove + signAfter;
            }
            result.append(cluster + reserved);
            state = 0;
            //end of while
        }

        return result.toString();
    }