added RobotString class for working with system properties and string…

src/main/java/com/github/markusbernhardt/seleniumlibrary/CustomRobotDriverElement.java

@@ -0,0 +1,49 @@
+package com.github.markusbernhardt.seleniumlibrary;
+
+import com.github.markusbernhardt.seleniumlibrary.keywords.BrowserManagement;
+import com.github.markusbernhardt.seleniumlibrary.keywords.Robot;
+import org.openqa.selenium.WebDriver;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+import java.lang.reflect.Field;
+
+/**
+ * For extends of custom keywords of WebDriver actions
+ */
+public class CustomRobotDriverElement {
+
+    private static SeleniumLibrary s;
+    private static BrowserManagement b;
+    private Robot robot = new Robot();
+
+    public CustomRobotDriverElement() throws NoSuchFieldException, IllegalAccessException {
+        try {
+            CustomRobotDriverElement.s = getLibraryInstance();
+        } catch (ScriptException e) {
+            throw new SeleniumLibraryNonFatalException("Cannot create SeleniumLibrary instance.", e);
+        }
+        Field bmField = SeleniumLibrary.class.getDeclaredField("bm");
+        bmField.setAccessible(true);
+        b = (BrowserManagement) bmField.get(s);
+        bmField.setAccessible(false);
+    }
+
+    private static SeleniumLibrary getLibraryInstance() throws ScriptException {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");
+        engine.put("library", "SeleniumLibrary");
+        engine.eval("from robot.libraries.BuiltIn import BuiltIn");
+        engine.eval("instance = BuiltIn().get_library_instance(library)");
+        return (SeleniumLibrary) engine.get("instance");
+    }
+
+    protected WebDriver getCurrentBrowser() {
+        return b.getCurrentWebDriver();
+    }
+
+    protected Robot getRobot() {
+        return robot;
+    }
+
+}