Review

class StrSubstitutor {
    /**
     * Replaces all the occurrences of variables in the given source object with
     * their matching values from the map.
     *
     * @param source  the source text containing the variables to substitute, null returns null
     * @param valueMap  the map with the values, may be null
     * @return the result of the replace operation
     */
    public static String replace(Object source, Map valueMap) {
        return new StrSubstitutor(valueMap).replace(source);
    }

}