Management du sessionStorage via ScriptEngine

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    import javax.script.Compilable;
    import javax.script.CompiledScript;
    import javax.script.Invocable;
    import javax.script.ScriptEngine;
    import javax.script.ScriptEngineManager;
 
    import fr.socram.assise.socle.logger.SocramLogger;
 
    public class ManageSessionStorage {
 
 
    public static final String GETTER_JS_VARIABLE = "var myGetterJs = function() { return     eval('window.sessionStorage.test'); };";
 
      public Boolean getItemValueSessionStorage() {
            Boolean result = false;
 
            try {
                  // Retrieving the Javascript engine
                  ScriptEngine se = new ScriptEngineManager().getEngineByName("javascript");
                  if (Compilable.class.isAssignableFrom(se.getClass())) {
                        // We can compile our JS code
                        Compilable c = (Compilable) se;
                        CompiledScript cs = c.compile(GETTER_JS_VARIABLE);
                        cs.eval();
                  }
                  else {
                        // We can't compile our JS code
                        se.eval(GETTER_JS_VARIABLE);
                  }
                  // Can we invoke myFunction()?
                  if (Invocable.class.isAssignableFrom(se.getClass())) {
                        Invocable i = (Invocable) se;
 
                        if (i.invokeFunction("myGetterJs", itemName) != null) {
                             result = Boolean.parseBoolean(i.invokeFunction("myGetterJs").toString());
                        }
                  }
            }
            catch (Exception e) {
                  // TODO: handle exception
            }
            return result;
      }
 
}