public static String delimitExpressions()

in drools-mvel/src/main/java/org/drools/mvel/builder/MVELConsequenceBuilder.java [335:445]

• 104 lines of code
• 40 McCabe index (conditional complexity)

    public static String delimitExpressions(String s) {

        StringBuilder result = new StringBuilder();
        char[] cs = s.toCharArray();
        int brace = 0;
        int sqre = 0;
        int crly = 0;
        int skippedNewLines = 0;
        boolean inString = false;
        char lastNonWhite = ';';
        for ( int i = 0; i < cs.length; i++ ) {
            char c = cs[i];
            switch ( c ) {
                case ' ' :
                case '\t' :
                    if (!inString && lookAhead(cs, i+1) == '.') {
                        continue;
                    }
                    break;
                case '\"' :
                    if ( i == 0 || cs[i-1] != '\\' ) {
                        inString = !inString;
                    }
                    break;
                case '/' :
                    if( i < cs.length-1 && cs[i+1] == '*' && !inString ) {
                        // multi-line comment
                        int start = i;
                        i+=2; // skip the /*
                        for( ; i < cs.length; i++ ) {
                            if( cs[i] == '*' && i < cs.length-1 && cs[i+1] == '/' ) {
                                i++; // skip the */
                                break;
                            } else if( cs[i] == '\n' || cs[i] == '\r' ) {
                                lastNonWhite = checkAndAddSemiColon( result,
                                                                     inString,
                                                                     brace,
                                                                     sqre,
                                                                     crly,
                                                                     lastNonWhite );
                            }
                        }
                        result.append( cs, start, i-start );
                        break;
                    } else if( i < cs.length-1 && cs[i+1] != '/' ) {
                        // not a line comment
                        break;
                    }
                    // otherwise handle it in the same way as #
                case '#' :
                    // line comment
                    lastNonWhite = checkAndAddSemiColon( result,
                                                         inString,
                                                         brace,
                                                         sqre,
                                                         crly,
                                                         lastNonWhite );
                    if (inString) {
                        result.append( c );
                    } else {
                        i = processLineComment( cs, i, result );
                    }
                    continue;
                case '(' :
                    brace++;
                    break;
                case '{' :
                    crly++;
                    break;
                case '[' :
                    sqre++;
                    break;
                case ')' :
                    brace--;
                    break;
                case '}' :
                    crly--;
                    break;
                case ']' :
                    sqre--;
                    break;
                default :
                    break;
            }

            if ( c == '\n' || c == '\r' ) {
                // line break
                if ( brace == 0 && sqre == 0 && crly == 0 &&
                     lastNonWhite != '.' && lookAhead(cs, i+1) != '.' ) {
                    if ( lastNonWhite != ';' ) {
                        result.append( ';' );
                        lastNonWhite = ';';
                    }
                    for (int j = 0; j < skippedNewLines; j++) {
                        result.append("\n");
                    }
                    skippedNewLines = 0;
                } else {
                    skippedNewLines++;
                    continue;
                }
            } else if ( !Character.isWhitespace( c ) ) {
                lastNonWhite = c;
            }
            result.append( c );
        }
        for (int i = 0; i < skippedNewLines; i++) {
            result.append("\n");
        }
        return result.toString();
    }