Java Module Configuration and Descritpion

1. Java Module Configuration
Narendran Solai Sridharan

2. EBNF of this Diagram:
JavaModuleConfiguration ::= '@annotation'* 'open'? 'module'
name '{' ('requires' 'transitive'? 'static'? moduleName (','
moduleName)* ';' )* ( ( 'exports' | 'opens' ) packageName ( 'to'
moduleName (',' moduleName)* )? ';' )* ( 'uses'
SPIClassNameWithPackage (',' SPIClassNameWithPackage)* ';'
';' )* ( 'provides' SPIClassNameWithPackage 'with'
SPIClassImplWithPackage (',' SPIClassImplWithPackage)* ';' )*
)* '}'
Rail Road Diagram
• EBNF format can be created for any
syntax and rail road diagram can be
generated.
• Tool - http://www.bottlecaps.de/rr/ui
Java Module Configuration
module-info.java

3. module
• Module name can be
be top most package
package name
• Reversed domain
name is allowed
• module != artifact

4. {Dependency Declaration
“requires” Directive &
Modifiers “requires” directive
• transitive & static are
modifiers

5. {Declaration of “exports ” &
“open” Directives & Qualifiers
“exports” & “opens”
directive
• Optional “to”
qualifies directive to
be applicable for
specific module.

6. {Declaration of Service
consumption “uses” Directive
“uses” directive
• Declares SPI use SPI -
Service Provider
Interfaces

7. {Service provisioning
“provides” & “with”
Directives
“provides” & “with”
directive
• Declares SPI present
in the Module.

8. To Access Entire Module via Reflection
Open & Opens
• public scoped class
or type is no more
public for reflection
& normal access
outside module
To Access particular
package via Reflection

9. To Access dependencies of
Dependency
Transitive
• Allows Multiple level
access.
• Allows Refactoring of
already exposed API.

10. To Access only at Compile
Time
Static
• Not all dependencies
are required at
runtime.
• Required only for
compilation,
provided by
platform during
runtime.

11. Thank you!!!