Merge pull request #772 from TikhomirovSergey/master

#102 FIX

Author: TikhomirovSergey

src/main/java/io/appium/java_client/MissingParameterException.java

@@ -16,10 +16,15 @@
 
 package io.appium.java_client;
 
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.stream.Collectors.toList;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 
+import java.util.List;
+import java.util.Map;
+
 /**
  * Used for Webdriver 3 multi-touch gestures
  * See the Webriver 3 spec https://dvcs.w3.org/hg/webdriver/raw-file/default/webdriver-spec.html
@@ -62,28 +67,22 @@ public MultiTouchAction add(TouchAction action) {
      * Perform the multi-touch action on the mobile performsTouchActions.
      */
     public MultiTouchAction perform() {
-        int size = actions.build().size();
-        if (size > 1) {
+        List<TouchAction> touchActions = actions.build();
+        checkArgument(touchActions.size() > 0,
+                "MultiTouch action must have at least one TouchAction added before it can be performed");
+        if (touchActions.size() > 1) {
             performsTouchActions.performMultiTouchAction(this);
-        } else if (size == 1) {
-            //android doesn't like having multi-touch actions with only a single TouchAction...
-            performsTouchActions.performTouchAction(actions.build().get(0));
-        } else {
-            throw new MissingParameterException(
-                "MultiTouch action must have at least one TouchAction "
-                    + "added before it can be performed");
-        }
+            return this;
+        }  //android doesn't like having multi-touch actions with only a single TouchAction...
+        performsTouchActions.performTouchAction(touchActions.get(0));
         return this;
     }
 
-    protected ImmutableMap<String, ImmutableList<Object>> getParameters() {
-        ImmutableList.Builder<Object> listOfActionChains = ImmutableList.builder();
+    protected Map<String, List<Object>> getParameters() {
         ImmutableList<TouchAction> touchActions = actions.build();
-
-        touchActions.forEach(action -> {
-            listOfActionChains.add(action.getParameters().get("actions"));
-        });
-        return ImmutableMap.of("actions", listOfActionChains.build());
+        return ImmutableMap.of("actions",
+                touchActions.stream().map(touchAction ->
+                        touchAction.getParameters().get("actions")).collect(toList()));
     }
 
     /**

src/main/java/io/appium/java_client/MultiTouchAction.java

@@ -19,8 +19,8 @@
 import static io.appium.java_client.MobileCommand.PERFORM_MULTI_TOUCH;
 import static io.appium.java_client.MobileCommand.PERFORM_TOUCH_ACTION;
 
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap;
+import java.util.List;
+import java.util.Map;
 
 public interface PerformsTouchActions extends ExecutesMethod {
     /**
@@ -37,7 +37,7 @@ public interface PerformsTouchActions extends ExecutesMethod {
      * @return the same touch action object
      */
     default TouchAction performTouchAction(TouchAction touchAction) {
-        ImmutableMap<String, ImmutableList<Object>> parameters = touchAction.getParameters();
+        Map<String, List<Object>> parameters = touchAction.getParameters();
         execute(PERFORM_TOUCH_ACTION, parameters);
         return touchAction.clearParameters();
     }
@@ -54,7 +54,7 @@ default TouchAction performTouchAction(TouchAction touchAction) {
      * @param multiAction the MultiTouchAction object to perform.
      */
     default void performMultiTouchAction(MultiTouchAction multiAction) {
-        ImmutableMap<String, ImmutableList<Object>> parameters = multiAction.getParameters();
+        Map<String, List<Object>> parameters = multiAction.getParameters();
         execute(PERFORM_MULTI_TOUCH, parameters);
         multiAction.clearActions();
     }

src/main/java/io/appium/java_client/PerformsTouchActions.java

@@ -21,6 +21,7 @@
 import static io.appium.java_client.touch.LongPressOptions.longPressOptions;
 import static io.appium.java_client.touch.offset.ElementOption.element;
 import static io.appium.java_client.touch.offset.PointOption.point;
+import static java.util.stream.Collectors.toList;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
@@ -34,6 +35,8 @@
 import org.openqa.selenium.WebElement;
 
 import java.time.Duration;
+import java.util.List;
+import java.util.Map;
 
 /**
  * Used for Webdriver 3 touch actions
@@ -415,13 +418,10 @@ public T perform() {
      *
      * @return A map of parameters for this touch action to pass as part of mjsonwp.
      */
-    protected ImmutableMap<String, ImmutableList<Object>> getParameters() {
-
-        ImmutableList.Builder<Object> parameters = builder();
-        ImmutableList<ActionParameter> actionList = parameterBuilder.build();
-
-        actionList.forEach(action -> parameters.add(action.getParameterMap()));
-        return ImmutableMap.of("actions", parameters.build());
+    protected Map<String, List<Object>> getParameters() {
+        List<ActionParameter> actionList = parameterBuilder.build();
+        return ImmutableMap.of("actions", actionList.stream()
+                .map(ActionParameter::getParameterMap).collect(toList()));
     }
 
     /**