*/
    int getColumnNumber();

    /**
     * Return the byte or character offset into the input source this location
     * is pointing to. If the input source is a file or a byte stream then
     * this is the byte offset into that stream, but if the input source is
     * a character media then the offset is the character offset.
     * Returns -1 if there is no offset available.
     * @return the current offset
     */

     */
    Metadata read(File input, Map<String, ?> options) throws IOException, MetadataParseException;

    /**
     * Reads the metadata from the specified character reader. The reader will be automatically closed before the method
     * returns.
     *
     * @param input The reader to deserialize the metadata from, must not be {@code null}.

    private static void notBlank(String str, String message) {
        final int strLen = str != null ? str.length() : 0;
        if (strLen > 0) {
            for (int i = 0; i < strLen; i++) {
                if (!Character.isWhitespace(str.charAt(i))) {
                    return;
                }
            }
        }
        throw new IllegalArgumentException(message);
    }

        public ObjectBasedValueSource(Object root) {
            super(true);
            this.root = root;
        }

        /**
         * <p>Split the expression into parts, tokenized on the dot ('.') character. Then,
         * starting at the root object contained in this value source, apply each part
         * to the object graph below this root, using either 'getXXX()' or 'isXXX()'

        checkVersionsEqual("1.0", "1.0.0");
        checkVersionsEqual("1", "1-0");
        checkVersionsEqual("1", "1.0-0");
        checkVersionsEqual("1.0", "1.0-0");
        // no separator between number and character
        checkVersionsEqual("1a", "1-a");
        checkVersionsEqual("1a", "1.0-a");
        checkVersionsEqual("1a", "1.0.0-a");
        checkVersionsEqual("1.0a", "1-a");
        checkVersionsEqual("1.0.0a", "1-a");

            // -1
            //  or QUALIFIERS.size and then resort to lexical ordering. Most comparisons are decided by the first
            // character,
            // so this is still fast. If more characters are needed then it requires a lexical sort anyway.
            return i == -1 ? (QUALIFIERS.size() + "-" + qualifier) : String.valueOf(i);
        }

         * extension should be file and URL path friendly, and may differ from algorithm name.
         * The checksum extension SHOULD NOT contain dot (".") character.
         * Example: "sha1".
         */
        @Nonnull
        String getFileExtension();

        /**

        // file. Ideally, we'd do full pattern-evaluation against the sysprops, but this
        // is a first step. There are several replacements below, in order to normalize
        // the path character before we operate on the string as a regex input, and
        // in order to avoid surprises with the File construction...
        // -------------------------------------------------------------------------------------

                String layout = className.substring(0, className.length() - "RepositoryLayout".length());
                if (!layout.isEmpty()) {
                    layout = Character.toLowerCase(layout.charAt(0)) + layout.substring(1);
                    return layout;
                }
            }
            return "";
        }
    }

    }

    @Override
    public String getLocation() {
        return location;
    }

    /**
     * Gets the content of this source.
     *
     * @return The underlying character stream, never {@code null}.
     */
    public String getContent() {
        return content;
    }

    @Override
    public String toString() {
        return getLocation();
    }

    @Override