[Android] Fix possibility to return ConstraintsMap and ConstraintsArray with null init value

ycherniavskyi · ycherniavskyi · commit 23a5a5151afa · 2020-04-28T15:20:47.000+03:00
Also fix flutter-webrtc#242.
diff --git a/android/src/main/java/com/cloudwebrtc/webrtc/utils/ConstraintsMap.java b/android/src/main/java/com/cloudwebrtc/webrtc/utils/ConstraintsMap.java
@@ -48,7 +48,11 @@ public String getString(String name){
     }
 
     public ConstraintsMap getMap(String name){
-        return new ConstraintsMap((Map<String, Object>)mMap.get(name));
+        Object value = mMap.get(name);
+        if (value == null) {
+            return null;
+        }
+        return new ConstraintsMap((Map<String, Object>) value);
     }
 
     public ObjectType getType(String name) {
@@ -110,7 +114,11 @@ public void putArray(String key, ArrayList<Object> value) {
     }
 
     public ConstraintsArray getArray(String name){
-        return new ConstraintsArray((ArrayList<Object>)mMap.get(name));
+        Object value = mMap.get(name);
+        if (value == null) {
+            return null;
+        }
+        return new ConstraintsArray((ArrayList<Object>) value);
     }
 
     public ArrayList<Object> getListArray(String name){

Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,11 @@ public String getString(String name){`
`48`	`48`	`}`
`49`	`49`
`50`	`50`	`public ConstraintsMap getMap(String name){`
`51`		`- return new ConstraintsMap((Map<String, Object>)mMap.get(name));`
	`51`	`+ Object value = mMap.get(name);`
	`52`	`+ if (value == null) {`
	`53`	`+ return null;`
	`54`	`+ }`
	`55`	`+ return new ConstraintsMap((Map<String, Object>) value);`
`52`	`56`	`}`
`53`	`57`
`54`	`58`	`public ObjectType getType(String name) {`
`@@ -110,7 +114,11 @@ public void putArray(String key, ArrayList<Object> value) {`
`110`	`114`	`}`
`111`	`115`
`112`	`116`	`public ConstraintsArray getArray(String name){`
`113`		`- return new ConstraintsArray((ArrayList<Object>)mMap.get(name));`
	`117`	`+ Object value = mMap.get(name);`
	`118`	`+ if (value == null) {`
	`119`	`+ return null;`
	`120`	`+ }`
	`121`	`+ return new ConstraintsArray((ArrayList<Object>) value);`
`114`	`122`	`}`
`115`	`123`
`116`	`124`	`public ArrayList<Object> getListArray(String name){`