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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);
}
}
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