public synchronized void load()

in velocity-engine-core/src/main/java/org/apache/velocity/util/ExtProperties.java [614:701]
67 lines of code
14 McCabe index (conditional complexity)

    public synchronized void load(InputStream input, String enc) throws IOException
    {
        PropertiesReader reader = null;
        if (enc != null)
        {
            try
            {
                reader = new PropertiesReader(new InputStreamReader(input, enc));

            }
            catch (UnsupportedEncodingException ex)
            {
                // Another try coming up....
            }
        }

        // fall back to UTF-8
        if (reader == null)
        {
            reader = new PropertiesReader(new InputStreamReader(input, StandardCharsets.UTF_8));
        }

        try
        {
            while (true)
            {
                String line = reader.readProperty();
                if (line == null)
                {
                    return;  // EOF
                }
                int equalSign = line.indexOf('=');

                if (equalSign > 0)
                {
                    String key = line.substring(0, equalSign).trim();
                    String value = line.substring(equalSign + 1).trim();

                    // Configure produces lines like this ... just ignore them
                    if ("".equals(value))
                    {
                        continue;
                    }

                    if (getInclude() != null && key.equalsIgnoreCase(getInclude()))
                    {
                        // Recursively load properties files.
                        File file = null;

                        if (value.startsWith(fileSeparator))
                        {
                            // We have an absolute path so we'll use this
                            file = new File(value);

                        }
                        else
                        {

                            // We have a relative path, and we have two
                            // possible forms here. If we have the "./" form
                            // then just strip that off first before continuing.
                            if (value.startsWith("." + fileSeparator))
                            {
                                value = value.substring(2);
                            }

                            file = new File(basePath + value);
                        }

                        if (file.exists() && file.canRead())
                        {
                            load(new FileInputStream(file));
                        }
                    }
                    else
                    {

                        addProperty(key, value);
                    }
                }
            }
        }
        finally
        {
            // Loading is initializing
            isInitialized = true;
        }
    }