jRestrict is a domain specific language built to restrict .java files into using only what’s specified in a simple .jstrict script. With jRestrict you can prohibit clauses from being used, require that a list of clauses is used or enclose your java file to a list of clauses.
The syntax for a jscript file is composed of four main commands:
files {
# list of files that will be validated by jRestrict
}
requires {
# list of clauses that should be on every java file specified in files{}
}
encloses {
# list of clauses that encloses all clauses which can be used in the java files
}
prohibits {
# list of clauses that cannot be used in the java files
}
The files command accept a list of java files separated by ;. E.g:
files {
Foo.java;
Bar.java;
}
These three commands accept a list of specific clauses made to validate some aspects of java files. The list of clauses is:
type: <java-type>; - restricts a java type usage in the whole code. This includes return type, variable type and argument type.
returntype: <java-type>; - restricts all methods from returning a java types defined here.
vartype: <java-type>; - restricts all varibles from using this java type.
operator: <java-operator>; - restricts the usage of java operators such as assignment.
modifier: <java-modifier>; - restricts the usage of modifiers such as public, private and protected.
import: <java-imports>; - restricts the usage of the import clause.
loop: <java-loop>; - restricts the usage of loop, break and continue.
branch: <java-branch>; - restricts the usage of if and switch.
In which the java arguments are separated by , and correspond to the arguments you want to restrict:
<java-type>: int, double, float, String, Object...
<java-operator>: +, -, --, +=, <<=, <=, !...
<java-modifier>: public, private, protected, static, volatile...
<java-imports>: java.util.*, java.util.HashSet...
<java-loop>: break, continue, for, foreach...
<java-branch>: if, switch