Java Client for Yelp Fusion
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README.md

YELP API V3 client

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This is a Java Client for YELP Fusion

It currently supports the following endpoints

  1. Installation
  2. Usage
    1. Authentication
    2. Searching businesses
      1. Search by location and coordinates
      2. Searching options
      3. Using this library as a proxy
      4. De-serializing the response
    3. Searching by ID
    4. Business reviews
    5. Using an existing token
    6. Working with Yelp's categories
  3. Tests
  4. LICENSE

Installation

Install this library via Maven and Jitpack. Add the following repository to your POM file.

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

Now add the following dependency.

<dependencies>
    <dependency>
        <groupId>com.github.MontealegreLuis</groupId>
        <artifactId>yelpv3-java-client</artifactId>
        <version>2.0.0</version>
    </dependency>
</dependencies>

That's it! Enjoy!

Usage

Authentication

Since access tokens expire in 180 days, you could save the token in your database, and renew it only if needed. All methods will authenticate automatically if no access token is present.

public class Demo {
    public static void main(String[] args){
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        AccessToken token = yelp.token();

        System.out.printf("Access token:%s%n", token.accessToken());
        System.out.printf("Token type:%s%n", token.tokenType());
        System.out.printf("Expires on:%s%n", token.expiresOn());
        System.out.printf("Is it expired? %s%n", token.isExpired());
    }
}

Searching businesses

Yelp's Business Search API supports two types of searches

  • By Location. It uses the combination of address, neighborhood, city, state or zip, and optionally the country
  • By Coordinates. The latitude and longitude of the business

They cannot be used at the same time

Search by location and coordinates

public class Demo {
    public static void main(String[] args){
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        yelp.search(SearchCriteria.byLocation("San Antonio"));
        yelp.search(SearchCriteria.byCoordinates(29.426786, -98.489576));
        yelp.search(SearchCriteria.byCoordinates(new Coordinates(29.426786, -98.489576)));
    }
}

Searching options

See the official documentation for more details.

public class Demo {
    public static void main(String[] args) {
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        SearchCriteria criteria = SearchCriteria.byLocation("San Antonio");
        criteria.withTerm("restaurants");
        criteria.withinARadiusOf(Distance.inMiles(2));
        criteria.inCategories("mexican");
        criteria.withPricing(PricingLevel.MODERATE);
        criteria.withAttributes(Attribute.HOT_AND_NEW, Attribute.DEALS);
        criteria.openNow();
        criteria.limit(10);
        criteria.offset(5);
        criteria.sortBy(SortingMode.REVIEW_COUNT);

        yelp.search(criteria);
    }
}

It is possible to specify the same criteria when using coordinates instead of location.

Using this library as a proxy

If you want to use this library as a proxy to avoid CORS issues in your JavaScript. It is possible to get the original Yelp JSON response.

public class Demo {
    public static void main(String[] args) {
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        SearchCriteria criteria = SearchCriteria.byLocation("San Antonio");

        String originalJsonResponse = yelp.search(criteria).originalResponse();
    }
}

De-serializing the response

This library comes with a default de-serializer, tha will convert the original JSON response into a DTO.

public class Demo {
    public static void main(String[] args){
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        SearchCriteria criteria = SearchCriteria.byLocation("San Antonio");

        SearchResult result = yelp.search(criteria).searchResult();

        System.out.println(result.total);
        for (Business business : result.businesses) {
            System.out.println("--------------------------------------");
            System.out.println(business.id);
            System.out.println(business.name);
            System.out.println(business.rating);
            System.out.println(business.distance.toString());
            System.out.println("Location:");
            System.out.println(business.location.address1);
            System.out.println(business.location.zipCode);
            System.out.println("Coordinates:");
            System.out.println(business.coordinates.latitude);
            System.out.println(business.coordinates.longitude);
            System.out.println("Transactions");
            if (business.transactions.size() > 0)
                business.transactions.forEach(transaction -> System.out.println(transaction.label));
            else System.out.println("No transactions were registered for this business");
        }
    }
}

Searching by ID

We also have 2 options when searching by ID

  • Get the original response
  • De-serialize the response to a DTO
public class Demo {
    public static void main(String[] args){
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        BusinessResponse response = yelp.searchById("bella-on-the-river-san-antonio");

        String jsonResponse = response.originalResponse();

        BusinessDetails business = response.business();

        System.out.println(business.id);
        System.out.println(business.name);
        System.out.println(business.rating);
        System.out.println(business.distance);
        System.out.println("Location:");
        System.out.println(business.location.address1);
        System.out.println(business.location.zipCode);
        System.out.println("Coordinates:");
        System.out.println(business.coordinates.latitude);
        System.out.println(business.coordinates.longitude);
        System.out.println("Transactions");
        if (business.transactions.size() > 0)
            business.transactions.forEach(transaction -> System.out.println(transaction.label));
        else System.out.println("No transactions for this business");
        System.out.println("Photos");
        for (String photo: business.photos) System.out.println(photo);
        if (business.schedule.isOpenNow) System.out.println("Business is open now!");
        business.schedule.hours.forEach((day, hours) -> {
            System.out.println(hour.day.toString());
            for (Hour hour : hours) {
                System.out.println(hour.start.toString());
                System.out.println(hour.end.toString());
            }
        });
    }
}

Business reviews

We also have 2 options when getting a business reviews

  • Get the original response
  • De-serialize the response to a DTO
public class Demo {
    public static void main(String[] args){
        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");

        BusinessResponse response = yelp.reviews("bella-on-the-river-san-antonio");

        String jsonResponse = response.originalResponse();

        List<Review> reviews = response.reviews();
        
        for (Review review: reviews) {
            System.out.println(review.createdAt);
            System.out.println(review.rating);
            System.out.println(review.text);
            System.out.println(review.user.image);
            System.out.println(review.user.name);
        }
    }
}

Using an existing token

As tokens expire every 180 days. It is possible to store the token and the expiration date in a database and use it, instead of getting a new token every time.

public class Demo {
    public static void main(String[] args){
        String token;    // It should come from your database
        String type;     // It should come from your database
        long expiresOn;  // It should come from your database

        AccessToken token = AccessToken.fromValues(token, type, expiresOn);

        Yelp yelp = new Yelp("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET", token);

        Business business = yelp.searchById("bella-on-the-river-san-antonio");
    }
}

Working with Yelp's categories

Currently, there's no endpoint to retrieve all the available categories in Yelp. However they offer this file to download them in JSON format.

You can use the classes SearchCategoriesParser and SearchCategories to load and filter categories using a local copy of this file.

public class Demo {
    public static void main(String[] args){
        SearchCategories categories = SearchCategoriesParser.all();
        
        SearchCategories parentCategoriesAvailableInTheUS = categories
            .parentCategories()
            .availableAt(Locale.US)
        ;

        SearchCategories childrenOfRestaurantsAvailableInMX = categories
            .childrenOf("restaurants")
            .availableAt(new Locale("es", "MX"))
        ;
    }
}

Tests

To run the test suite, you'll need to create an application.properties file. You will need both, your Yelp API client and secret. This library has some integration tests to verify that when a specific locale is requested, messages are translated to the correct language. You'll need a key from the Language detection API in order to run those tests.

Create a copy from example.properties and use your keys as values

$ cp src/main/resources/example.properties src/main/resources/application.properties

Run the tests suite using Maven

$ mvn test

License

Released under the MIT License