Nova Ordis Generic Variable and Expression System
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Internal
Overview
The implementation of a generic variable system. Variables are scoped, typed and named placeholders for values. Variable instances can only be created by declaring them in a scope, with Scope.declare(). Once declared in a scope, the variable is available to all enclosed scopes.The same variable may be declared in more than one scope, and may have different values in different scopes.
Values are assigned to a variable with set() and retrieved with get(). The value of a variable may be null.
Example
Scope s = new ScopeImpl();
Variable<String> v = s.declare("color", String.class, "blue");