Adding support for retrieving dynamic system properties

cloudslang-compiler/src/main/java/io/cloudslang/lang/compiler/modeller/transformers/AbstractInOutForTransformer.java

@@ -37,6 +37,11 @@ protected Accumulator extractFunctionData(Serializable... values) {
                     functionDependencies.add(ScriptFunction.GET);
                 }
 
+                boolean getSpVarFunctionFound = ExpressionUtils.matchGetSystemPropertyVariableFunction(expression);
+                if (getSpVarFunctionFound) {
+                    functionDependencies.add(ScriptFunction.GET_SP_VAR);
+                }
+
                 for (ScriptFunction function : ScriptFunction.values()) {
                     if (ExpressionUtils.matchesFunction(function, expression)) {
                         functionDependencies.add(function);

cloudslang-entities/src/main/java/io/cloudslang/lang/entities/bindings/ScriptFunction.java

@@ -41,7 +41,9 @@ public enum ScriptFunction {
 
     CS_XPATH_QUERY("cs_xpath_query"),
 
-    CS_JSON_QUERY("cs_json_query");
+    CS_JSON_QUERY("cs_json_query"),
+
+    GET_SP_VAR("get_sp_var");
 
     private final String value;
 

cloudslang-entities/src/main/java/io/cloudslang/lang/entities/constants/Regex.java

@@ -98,5 +98,8 @@ public class Regex {
     public static final String DESCRIPTION_TOKEN = "#!";
 
     public static final String DESCRIPTION_EMPTY_LINE = "(\\s*)(#!)(\\s*)";
+
+    // get_sp_var(flow_input)
+    public static final String GET_SP_VAR_REGEX = "get_sp_var\\(\\s*(.+)\\s*\\)";
     //////////////// description end
 }

cloudslang-entities/src/main/java/io/cloudslang/lang/entities/utils/ExpressionUtils.java

@@ -36,6 +36,7 @@
 import static io.cloudslang.lang.entities.constants.Regex.SYSTEM_PROPERTY_REGEX_WITH_DEFAULT_DOUBLE_QUOTE;
 import static io.cloudslang.lang.entities.constants.Regex.SYSTEM_PROPERTY_REGEX_WITH_DEFAULT_SINGLE_QUOTE;
 import static java.util.regex.Pattern.compile;
+import static io.cloudslang.lang.entities.constants.Regex.GET_SP_VAR_REGEX;
 
 /**
  * @author Bonczidai Levente
@@ -65,6 +66,8 @@ private ExpressionUtils() {
 
     private static final Map<ScriptFunction, Pattern> patternsMap = new HashMap<>();
 
+    private static final Pattern GET_SP_VAR_PATTERN = compile(GET_SP_VAR_REGEX, Pattern.UNICODE_CHARACTER_CLASS);
+
     static {
         addPattern(ScriptFunction.CHECK_EMPTY, CHECK_EMPTY_REGEX);
         addPattern(ScriptFunction.CS_APPEND, CS_APPEND_REGEX);
@@ -131,4 +134,8 @@ public static boolean matchesFunction(ScriptFunction function, String expression
 
         return false;
     }
+
+    public static boolean matchGetSystemPropertyVariableFunction(String text) {
+        return matchPattern(GET_SP_VAR_PATTERN, text);
+    }
 }

cloudslang-runtime/src/main/java/io/cloudslang/lang/runtime/bindings/scripts/ScriptEvaluator.java

@@ -80,7 +80,13 @@ private Value doEvaluateExpressionJython(String expr,
                                              Set<SystemProperty> systemProperties,
                                              Set<ScriptFunction> functionDependencies) {
         Map<String, Serializable> jythonContext = createJythonContext(context);
-        boolean systemPropertiesDefined = functionDependencies.contains(ScriptFunction.GET_SYSTEM_PROPERTY);
+
+        boolean systemPropertiesDefined = false;
+        if (functionDependencies.contains(ScriptFunction.GET_SYSTEM_PROPERTY) ||
+                functionDependencies.contains(ScriptFunction.GET_SP_VAR)) {
+            systemPropertiesDefined = true;
+        }
+
         if (systemPropertiesDefined) {
             jythonContext.put(SYSTEM_PROPERTIES_MAP,
                     (Serializable) prepareSystemPropertiesForJython(systemProperties));
@@ -93,7 +99,11 @@ private Value doEvaluateExpressionExternalPython(String expr,
                                                      Set<SystemProperty> systemProperties,
                                                      Set<ScriptFunction> functionDependencies) {
         Map<String, Serializable> pythonContext = createExternalPythonContext(context);
-        boolean systemPropertiesDefined = functionDependencies.contains(ScriptFunction.GET_SYSTEM_PROPERTY);
+        boolean systemPropertiesDefined = false;
+        if (functionDependencies.contains(ScriptFunction.GET_SYSTEM_PROPERTY) ||
+                functionDependencies.contains(ScriptFunction.GET_SP_VAR)) {
+            systemPropertiesDefined = true;
+        }
         if (systemPropertiesDefined) {
             pythonContext.put(SYSTEM_PROPERTIES_MAP,
                     (Serializable) prepareSystemPropertiesForExternalPython(systemProperties));

cloudslang-runtime/src/main/java/io/cloudslang/lang/runtime/services/ScriptsService.java

@@ -45,7 +45,8 @@ public void init() throws IOException {
                 ScriptFunction.CS_ROUND,
                 ScriptFunction.CS_SUBSTRING,
                 ScriptFunction.CS_TO_UPPER,
-                ScriptFunction.CS_TO_LOWER
+                ScriptFunction.CS_TO_LOWER,
+                ScriptFunction.GET_SP_VAR
         );
 
         for (ScriptFunction function: list) {

cloudslang-runtime/src/main/resources/scripts/get_sp_var.py

@@ -0,0 +1,8 @@
+def get_sp_var(key):
+  try:
+    value1 = get_from_smaller_context(key)
+  except NameError:
+    value1 = globals().get(key)
+  accessed(value1)
+  property_value = sys_prop.get(value1)
+  return property_value