public String generate()

in src/main/java/org/apache/commons/text/RandomStringGenerator.java [390:427]

38 lines of code
12 McCabe index (conditional complexity)


    public String generate(final int length) {
        if (length == 0) {
            return StringUtils.EMPTY;
        }
        Validate.isTrue(length > 0, "Length %d is smaller than zero.", length);
        final StringBuilder builder = new StringBuilder(length);
        long remaining = length;
        do {
            final int codePoint;
            if (characterList != null && !characterList.isEmpty()) {
                codePoint = generateRandomNumber(characterList);
            } else {
                codePoint = generateRandomNumber(minimumCodePoint, maximumCodePoint);
            }
            switch (Character.getType(codePoint)) {
            case Character.UNASSIGNED:
            case Character.PRIVATE_USE:
            case Character.SURROGATE:
                continue;
            default:
            }
            if (inclusivePredicates != null) {
                boolean matchedFilter = false;
                for (final CharacterPredicate predicate : inclusivePredicates) {
                    if (predicate.test(codePoint)) {
                        matchedFilter = true;
                        break;
                    }
                }
                if (!matchedFilter) {
                    continue;
                }
            }
            builder.appendCodePoint(codePoint);
            remaining--;
        } while (remaining != 0);
        return builder.toString();
    }