public DefaultConfigurationKey commonKey()

in src/main/java/org/apache/commons/configuration2/tree/DefaultConfigurationKey.java [181:202]

• 19 lines of code
• 7 McCabe index (conditional complexity)

    public DefaultConfigurationKey commonKey(final DefaultConfigurationKey other) {
        if (other == null) {
            throw new IllegalArgumentException("Other key must no be null!");
        }

        final DefaultConfigurationKey result = new DefaultConfigurationKey(getExpressionEngine());
        final KeyIterator it1 = iterator();
        final KeyIterator it2 = other.iterator();

        while (it1.hasNext() && it2.hasNext() && partsEqual(it1, it2)) {
            if (it1.isAttribute()) {
                result.appendAttribute(it1.currentKey());
            } else {
                result.append(it1.currentKey());
                if (it1.hasIndex) {
                    result.appendIndex(it1.getIndex());
                }
            }
        }

        return result;
    }