Custom {{handlebars.java}} helper that enables Petrovich4j library usage

usage:

{{petrovich object formatString case='Accusative' gender=gender [firstName=name lastName=surname patronymic=patronymic]}}

or

{{petrovich formatString case='Dative' gender=gender firstName=name lastName=surname patronymic=patronymic}}

([*] - optional parameters)

Sample:

{{petrovich '{F} {I} {O}' case='Accusative' gender=user.gender
                    patronymic=user.middleName
                    lastName=user.lastName
                    firstName=user.name}}

will be rendered to user name in Accusative case with given format

formatString accepts:

• {F} - surname in full form
• {f} - surname in initials form
• {I} - name in full form
• {i} - name in initials form
• {O} - patronymic in full form
• {o} - patronymic in initials form
• other character sequences keeps their state

Sample: '{F} {I} {O}' will rendered to string 'LastName Name Patronymic', '{F} {i}{o}' will rendered to string 'LastName N.P.'

By default petrovich helper tries to get next fields from object:

• firstName (as name)
• lastName (as surname)
• patronymic (as patronymic) Can be override by directly passed hash-parameters (with such types)

Possible gender values:

• MALE
• FEMALE
• resolve (case insensitive) - try to resolve gender by patronymic (Male will turn if cannot
• any other will be passed to Petrovich as Gender.Both type

Usage:

{{#if (is_gender patronymic_value test_gender)}}
  gender is equals
{{else}}
  gender not equals
{{/if}}

Where

• patranymic_value is string with patronymic only (other parts of name cannot be used to resolve gender).
• test_gender - string value with gender for equals block (male or female, case insensitive)

Some notes:

• if gender is not correct - always else block will executed
• if patronymic cannot be resolved for gender - male will be used as default

Project is available under Apache License 2