Java

PayPal - Generate Invoice Number

See more PayPal Examples

Generates the next invoice number that is available to the user.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Rest;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // Note: Requires Chilkat v9.5.0.65 or greater.

        // This requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // Load our previously obtained access token. (see PayPal OAuth2 Access Token)
        JsonObject jsonToken = new JsonObject();
        jsonToken.loadFile("qa_data/tokens/paypal.json");

        // Build the Authorization request header field value.
        StringBuilder sbAuth = new StringBuilder();
        // token_type should be "Bearer"
        sbAuth.append(jsonToken.stringOf("token_type"));
        sbAuth.append(" ");
        sbAuth.append(jsonToken.stringOf("access_token"));

        // Make the initial connection.
        // A single REST object, once connected, can be used for many PayPal REST API calls.
        // The auto-reconnect indicates that if the already-established HTTPS connection is closed,
        // then it will be automatically re-established as needed.
        Rest rest = new Rest();
        boolean bAutoReconnect = true;
        try {
            rest.connect("api.sandbox.paypal.com", 443, true, bAutoReconnect);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // ----------------------------------------------------------------------------------------------
        // The code above this comment could be placed inside a function/subroutine within the application
        // because the connection does not need to be made for every request.  Once the connection is made
        // the app may send many requests..
        // ----------------------------------------------------------------------------------------------

        // Clear the REST object of any headers or query params from previous requests.
        rest.clearAllHeaders();
        rest.clearAllQueryParams();

        rest.addHeader("Authorization", sbAuth.getAsString());

        // Send the POST request with an emtpy body and get the JSON response.
        StringBuilder sbJsonRequest = new StringBuilder();
        StringBuilder sbJsonResponse = new StringBuilder();
        try {
            rest.fullRequestSb("POST", "/v1/invoicing/invoices/next-invoice-number", sbJsonRequest, sbJsonResponse);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        JsonObject json = new JsonObject();
        json.setEmitCompact(false);
        json.loadSb(sbJsonResponse);

        System.out.println("Response Status Code = " + rest.getResponseStatusCode());

        // Did we get a 200 success response?
        if (rest.getResponseStatusCode() != 200) {
            System.out.println(json.emit());
            System.out.println("Failed.");
            return;
        }

        // Sample JSON response is shown below.
        System.out.println(json.emit());
        System.out.println("----------------------");
        System.out.println("Next invoice number: " + json.stringOf("number"));
        System.out.println("success");

        // ------------------------------------------------
        // A sample JSON response:

        //     {
        //       "number": "0003"
        //     }
    }
}