Merchant API code sample to list online return policies.

### Java

    // Copyright 2025 Google LLC
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    //     https://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.

    package shopping.merchant.samples.accounts.onlinereturnpolicy.v1;

    import com.google.api.gax.core.FixedCredentialsProvider;
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.shopping.merchant.accounts.v1.ListOnlineReturnPoliciesRequest;
    import com.google.shopping.merchant.accounts.v1.OnlineReturnPolicy;
    import com.google.shopping.merchant.accounts.v1.OnlineReturnPolicyServiceClient;
    import com.google.shopping.merchant.accounts.v1.OnlineReturnPolicyServiceClient.ListOnlineReturnPoliciesPagedResponse;
    import com.google.shopping.merchant.accounts.v1.OnlineReturnPolicyServiceSettings;
    import shopping.merchant.samples.utils.Authenticator;
    import shopping.merchant.samples.utils.Config;

    /**
     * This class demonstrates how to list the OnlineReturnPolicy for a given Merchant Center account.
     */
    public class ListOnlineReturnPoliciesSample {

      public static void listOnlineReturnPolicies(Config config) throws Exception {

        // Obtains OAuth token based on the user's configuration.
        GoogleCredentials credential = new Authenticator().authenticate();

        // Creates service settings using the credentials retrieved above.
        OnlineReturnPolicyServiceSettings onlineReturnPolicyServiceSettings =
            OnlineReturnPolicyServiceSettings.newBuilder()
                .setCredentialsProvider(FixedCredentialsProvider.create(credential))
                .build();

        // Creates parent to identify where to list the online return policies.
        // The parent has the format: accounts/{account}
        String parent = "accounts/" + config.getAccountId().toString();

        // Calls the API and catches and prints any network failures/errors.
        try (OnlineReturnPolicyServiceClient onlineReturnPolicyServiceClient =
            OnlineReturnPolicyServiceClient.create(onlineReturnPolicyServiceSettings)) {

          // The name has the format: accounts/{account}/onlineReturnPolicies
          ListOnlineReturnPoliciesRequest request =
              ListOnlineReturnPoliciesRequest.newBuilder().setParent(parent).setPageSize(20).build();

          System.out.println("Sending List OnlineReturnPolicies request:");
          ListOnlineReturnPoliciesPagedResponse onlineReturnPolicyPagedResponse =
              onlineReturnPolicyServiceClient.listOnlineReturnPolicies(request);

          int count = 0;

          // Iterates through the OnlineReturnPolicy and prints each OnlineReturnPolicy.
          for (OnlineReturnPolicy onlineReturnPolicy : onlineReturnPolicyPagedResponse.iterateAll()) {
            System.out.println(onlineReturnPolicy);
            count++;
          }

          System.out.println("The following count of OnlineReturnPolicies is returned: ");
          System.out.println(count);
        } catch (Exception e) {
          System.out.println(e);
        }
      }

      public static void main(String[] args) throws Exception {
        Config config = Config.load();

        listOnlineReturnPolicies(config);
      }
    }

### PHP


    <?php
    /**
     * Copyright 2025 Google LLC
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     https://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    require_once __DIR__ . '/../../../../vendor/autoload.php';
    require_once __DIR__ . '/../../../Authentication/Authentication.php';
    require_once __DIR__ . '/../../../Authentication/Config.php';

    use Google\ApiCore\ApiException;
    use Google\Shopping\Merchant\Accounts\V1\Client\OnlineReturnPolicyServiceClient;
    use Google\Shopping\Merchant\Accounts\V1\ListOnlineReturnPoliciesRequest;

    /**
     * This class demonstrates how to list the OnlineReturnPolicies for a given
     * Merchant Center account.
     */
    class ListOnlineReturnPoliciesSample
    {
        /**
         * A helper function to create the parent string.
         *
         * @param string $accountId The merchant account ID.
         *
         * @return string The parent has the format: `accounts/{account}`
         */
        private static function getParent(string $accountId): string
        {
            return sprintf('accounts/%s', $accountId);
        }

        /**
         * Lists the online return policies for your Merchant Center account.
         *
         * @param array $config The configuration data for authentication and account ID.
         */
        public static function listOnlineReturnPolicies(array $config): void
        {
            // Gets the OAuth credentials to make the request.
            $credentials = Authentication::useServiceAccountOrTokenFile();

            // Creates options containing credentials for the client to use.
            $options = ['credentials' => $credentials];

            // Creates a client.
            $onlineReturnPolicyServiceClient =
                new OnlineReturnPolicyServiceClient($options);

            // Creates the parent account resource name.
            $parent = self::getParent($config['accountId']);

            // Calls the API and catches and prints any network failures/errors.
            try {
                // Creates the request object.
                $request = new ListOnlineReturnPoliciesRequest([
                    'parent' => $parent,
                    'page_size' => 20,
                ]);

                printf("Sending List OnlineReturnPolicies request:%s", PHP_EOL);
                $pagedResponse = $onlineReturnPolicyServiceClient->listOnlineReturnPolicies(
                    $request
                );

                $count = 0;

                // Iterates through all elements of the response and prints them.
                foreach ($pagedResponse->iterateAllElements() as $onlineReturnPolicy) {
                    // The `serializeToJsonString()` method is chosen here for better
                    // readability of the output.
                    printf(
                        '%s%s',
                        $onlineReturnPolicy->serializeToJsonString(true),
                        PHP_EOL
                    );
                    $count++;
                }

                printf(
                    'The following count of OnlineReturnPolicies is returned: %s',
                    PHP_EOL
                );
                printf('%d%s', $count, PHP_EOL);
            } catch (ApiException $e) {
                printf('%s%s', $e->getMessage(), PHP_EOL);
            }
        }

        /**
         * Helper to execute the sample.
         */
        public function callSample(): void
        {
            $config = Config::generateConfig();
            self::listOnlineReturnPolicies($config);
        }
    }

    // Runs the script.
    $sample = new ListOnlineReturnPoliciesSample();
    $sample->callSample();

### Python

    # -*- coding: utf-8 -*-
    # Copyright 2025 Google LLC
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #     http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.

    """Lists the online return policies for a given account."""

    from examples.authentication import configuration
    from examples.authentication import generate_user_credentials
    from google.shopping.merchant_accounts_v1 import ListOnlineReturnPoliciesRequest
    from google.shopping.merchant_accounts_v1 import OnlineReturnPolicyServiceClient

    _ACCOUNT = configuration.Configuration().read_merchant_info()
    _PARENT = f"accounts/{_ACCOUNT}"


    def list_online_return_policies() -> None:
      """Lists the online return policies for a given account."""

      # Gets OAuth Credentials.
      credentials = generate_user_credentials.main()

      # Creates a client.
      client = OnlineReturnPolicyServiceClient(credentials=credentials)

      # Creates the request.
      # The parent has the format: accounts/{account}
      request = ListOnlineReturnPoliciesRequest(parent=_PARENT, page_size=20)

      # Makes the request and catches and prints any error messages.
      try:
        print("Sending List OnlineReturnPolicies request:")
        # Issues the request and iterates over the response.
        response = client.list_online_return_policies(request=request)

        count = 0
        # Iterates through the OnlineReturnPolicy and prints each one.
        for online_return_policy in response:
          print(online_return_policy)
          count += 1

        print("The following count of OnlineReturnPolicies is returned: ")
        print(count)

      except RuntimeError as e:
        print(e)


    if __name__ == "__main__":
      list_online_return_policies()