1 files changed, 65 insertions, 0 deletions
diff --git a/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/manager/SnippetObjectConverterManager.java b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/manager/SnippetObjectConverterManager.java
new file mode 100644
index 0000000..df8af53
--- /dev/null
+++ b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/manager/SnippetObjectConverterManager.java
@@ -0,0 +1,65 @@
+package com.google.android.mobly.snippet.manager;
+
+import com.google.android.mobly.snippet.SnippetObjectConverter;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Type;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+/**
+ * Manager for classes that implement {@link SnippetObjectConverter}.
+ *
+ * <p>This class is created to separate how Snippet Lib handles object conversion internally from
+ * how the conversion scheme for complex types is defined for users.
+ *
+ * <p>Snippet Lib can pull in the custom serializers and deserializers through here in various
+ * stages of execution, whereas users can have a clean interface for supplying these methods without
+ * worrying about internal states of Snippet Lib.
+ *
+ * <p>This gives us the flexibility of changing Snippet Lib internal structure or expanding support
+ * without impacting users. E.g. we can support multiple converter classes in the future.
+ */
+public class SnippetObjectConverterManager {
+    private static SnippetObjectConverter mConverter;
+    private static volatile SnippetObjectConverterManager mManager;
+
+    private SnippetObjectConverterManager() {}
+
+    public static synchronized SnippetObjectConverterManager getInstance() {
+        if (mManager == null) {
+            mManager = new SnippetObjectConverterManager();
+        }
+        return mManager;
+    }
+
+    static void addConverter(Class<? extends SnippetObjectConverter> converterClass) {
+        if (mConverter != null) {
+            throw new RuntimeException("A converter has been added, cannot add again.");
+        }
+        try {
+            mConverter = converterClass.getConstructor().newInstance();
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException("No default constructor found for the converter class.");
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e.getCause());
+        } catch (InstantiationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Object objectToJson(Object object) throws JSONException {
+        if (mConverter == null) {
+            return null;
+        }
+        return mConverter.serialize(object);
+    }
+
+    public Object jsonToObject(JSONObject jsonObject, Type type) throws JSONException {
+        if (mConverter == null) {
+            return null;
+        }
+        return mConverter.deserialize(jsonObject, type);
+    }
+}