private List parseElements()

in src/main/java/org/apache/commons/beanutils2/converters/ArrayConverter.java [377:433]
46 lines of code
14 McCabe index (conditional complexity)

    private List<String> parseElements(String value) {
        if (log().isDebugEnabled()) {
            log().debug("Parsing elements, delimiter=[" + delimiter + "], value=[" + value + "]");
        }

        // Trim any matching '{' and '}' delimiters
        value = toTrim(value);
        if (value.startsWith("{") && value.endsWith("}")) {
            value = value.substring(1, value.length() - 1);
        }

        final String typeName = toString(String.class);
        try {

            // Set up a StreamTokenizer on the characters in this String
            final StreamTokenizer st = new StreamTokenizer(new StringReader(value));
            st.whitespaceChars(delimiter , delimiter); // Set the delimiters
            st.ordinaryChars('0', '9');  // Needed to turn off numeric flag
            st.wordChars('0', '9');      // Needed to make part of tokens
            for (final char allowedChar : allowedChars) {
                st.ordinaryChars(allowedChar, allowedChar);
                st.wordChars(allowedChar, allowedChar);
            }

            // Split comma-delimited tokens into a List
            List<String> list = null;
            while (true) {
                final int ttype = st.nextToken();
                if (ttype == StreamTokenizer.TT_WORD || ttype > 0) {
                    if (st.sval != null) {
                        if (list == null) {
                            list = new ArrayList<>();
                        }
                        list.add(st.sval);
                    }
                } else if (ttype == StreamTokenizer.TT_EOF) {
                    break;
                } else {
                    throw ConversionException.format("Encountered token of type %s parsing elements to '%s'.", ttype, typeName);
                }
            }

            if (list == null) {
                list = Collections.emptyList();
            }
            if (log().isDebugEnabled()) {
                log().debug(list.size() + " elements parsed");
            }

            // Return the completed list
            return list;

        } catch (final IOException e) {
            throw new ConversionException("Error converting from String to '"
                    + typeName + "': " + e.getMessage(), e);
        }
    }