A simple client for the Clarifai v2 API.

• Try the Clarifai demo at: https://clarifai.com/demo
• Sign up for a free account at: https://developer.clarifai.com/signup/
• Read the developer guide at: https://developer.clarifai.com/guide-v2/
• Read the full Javadocs at: https://jitpack.io/com/github/clarifai/clarifai-java/[version]/javadoc/

NOTE: If you are planning to contribute to this API client, please see the CONTRIBUTING.md file.

Add the following to the dependencies section of your build.gradle:

compile 'com.clarifai.clarifai-api2:core:[version]'

Add the following to your dependencies:

<dependency>
  <groupId>com.clarifai.clarifai-api2</groupId>
  <artifactId>core</artifactId>
  <version>[version]</version>
</dependency>

To create a ClarifaiClient instance, do the following:

final ClarifaiClient client = new ClarifaiBuilder("appID", "appSecret").buildSync();

The ClarifaiBuilder optionally allows you to pass in a custom OkHttpClient (allowing for user-defined parameters such as connection timeouts, etc).

Network operations using the API client only occur by calling .executeSync() or .executeAsync(...) on a ClarifaiRequest<T> object.

All methods on the ClarifaiClient will either return a ClarifaiRequest<T> or ClarifaiPaginatedRequest<T>, or a custom object that allows you to specify parameters that go into ultimately building a ClarifaiRequest<T> or ClarifaiPaginatedRequest<T>.

Using .executeSync() will block the current thread and return a ClarifaiResponse<T>, where T is the returned data type. ClarifaiResponse<T> has methods to check the success or failure status of the method, and methods that mimic Java 8 Optional<T> to safely retrieve the returned data.

Using .executeAsync() returns void, but allows the user to pass in callback(s) to handle successful responses, failed responses, and/or network errors.

ClarifaiPaginatedRequest<T> objects should be thought of as factories that create ClarifaiRequest<T>s. When building a ClarifaiPaginatedRequest<T>, you have the option of specifying a perPage (the number of elements in each page of the response).

Once a ClarifaiPaginatedRequest<T> is built, you can call ClarifaiPaginatedRequest#getPage(int) to get back a ClarifaiRequest<T> for the specified page. Pages are 1-indexed. Currently, the API does not indicate how many elements there are in a paginated request in total, but this is planned for the future.

All responses from the API are immutable data types (constructed using AutoValue). Some of these types, such as ClarifaiModel, are also used as parameters to make requests (for example, you can either get a model as a response from the API, or pass a model to the API to create it in your account). Builders are exposed to the user for all data types that they can use as request params.

Some convenience methods are provided as well on data types; eg: myModel.predict() on ClarifaiModel.

This allows you to make requests in a fluent, object-oriented way. For example:

client.getModelByID("myID").executeAsync(
    model -> model.predict()
        .withInputs(input)
        .executeAsync(
            outputs -> System.out.println("First output of this prediction is " + outputs.get(0))
        ),
    code -> System.err.println("Error code: " + code + ". Error msg: " + message),
    e -> { throw new ClarifaiException(e); }
);

JDK 7 or later.

The client will work on Android Gingerbread and higher (minSdkVersion 9).

You need to add the INTERNET permission to your AndroidManifest.xml, as follows:

<uses-permission android:name="android.permission.INTERNET" />

The Android Linter may also give an "InvalidPackage" error. This error may be safely ignored, and is caused by OkHttp using Java 8 methods when they are available (which will not occur on Android). To suppress these linter errors, do NOT disable your linter. Simply follow the instructions here.