OData Connector for JAVA OData Connector can be used to integrated any REST API which supports OData Standard. You can view tables, read data from tables using this connector. It also comes with some example OData Services to get started. In this article you will learn how to quickly and efficiently integrate OData data in JAVA. We will use high-performance OData Connector to easily connect to OData and then access the data inside JAVA. Let's follow the steps below to see how we can accomplish that! Download Documentation OData Connector for JAVA is based on ZappySys API Driver which is part of ODBC PowerPack. It is a collection of high-performance ODBC drivers that enable you to integrate data in SQL Server, SSIS, a programming language, or any other ODBC-compatible application. ODBC PowerPack supports various file formats, sources and destinations, including REST/SOAP API, SFTP/FTP, storage services, and plain files, to mention a few.

Connect to OData in other apps Connect to OData in SSIS Connect to OData in SQL Server Connect to OData in Power BI Connect to OData in SSRS Connect to OData in Informatica Connect to OData in MS Access Connect to OData in MS Excel Connect to OData in SSAS Connect to OData in C# Connect to OData in Python Connect to OData in Tableau Connect to OData in SAP Crystal Reports Connect to OData in Azure Data Factory (Pipeline) Connect to OData in Azure Data Factory (SSIS) Connect to OData in Talend Studio Connect to OData in UiPath Connect to OData in PowerShell Connect to OData in ODBC

Create Data Source in ZappySys Data Gateway based on API Driver

1. Download and install ODBC PowerPack.

2. Search for gateway in start menu and Open ZappySys Data Gateway:
   

3. Go to Users Tab to add our first Gateway user. Click Add; we will give it a name tdsuser and enter password you like to give. Check Admin option and click OK to save. We will use these details later when we create linked server:
   

4. Now we are ready to add a data source. Click Add, give data source a name (Copy this name somewhere, we will need it later) and then select Native - ZappySys API Driver. Finally, click OK. And it will create the Data Set for it and open the ZS driver UI.

   OdataDSN

   
   

5. When the Configuration window appears give your data source a name if you haven't done that already, then select "OData" from the list of Popular Connectors. If "OData" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:

   OdataDSN

   OData

   

6. Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.

    No Authentication [Http]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   No Authentication [Http]

   https://services.odata.org/V3/Northwind/Northwind.svc

   Optional Parameters
   RetryMode	RetryWhenStatusCodeMatch
   RetryStatusCodeList	429
   RetryCountMax	5
   RetryMultiplyWaitTime	True
   IgnoreSSLCertificateErrors
   SslVersion

   

    Windows Authentication [Http]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   Windows Authentication [Http]

   https://services.odata.org/V3/Northwind/Northwind.svc

   This Authentication Type has no parameters to fill-in.

   

    Basic Authentication [Http]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   Basic Authentication [Http]

   https://services.odata.org/V3/Northwind/Northwind.svc

   Required Parameters
   UserName	Fill-in the parameter...
   Password	Fill-in the parameter...
   Optional Parameters
   RetryMode	RetryWhenStatusCodeMatch
   RetryStatusCodeList	429
   RetryCountMax	5
   RetryMultiplyWaitTime	True
   IgnoreSSLCertificateErrors
   SslVersion

   

    NTLM Authentication [Http]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   NTLM Authentication [Http]

   https://services.odata.org/V3/Northwind/Northwind.svc

   Required Parameters
   UserName (i.e. Domain\UserName)	Fill-in the parameter...
   Password	Fill-in the parameter...
   Optional Parameters
   RetryMode	RetryWhenStatusCodeMatch
   RetryStatusCodeList	429
   RetryCountMax	5
   RetryMultiplyWaitTime	True
   IgnoreSSLCertificateErrors
   SslVersion

   

    Token Authentication [Http]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   Token Authentication [Http]

   https://services.odata.org/V3/Northwind/Northwind.svc

   Required Parameters
   Token	Fill-in the parameter...
   Optional Parameters
   AuthScheme	Bearer
   AuthHeader	Authorization
   RetryMode	RetryWhenStatusCodeMatch
   RetryStatusCodeList	429
   RetryCountMax	5
   RetryMultiplyWaitTime	True
   IgnoreSSLCertificateErrors
   SslVersion

   

    OAuth Connection for OData API [OAuth]

   Fill in all required parameters and set optional parameters if needed:

   OdataDSN

   OData

   OAuth Connection for OData API [OAuth]

   https://services.odata.org/V3/Northwind/Northwind.svc

   Optional Parameters
   GrantType	Default
   OAuthVersion	Default
   ClientId
   ClientSecret
   UserName
   Password
   Scope
   AuthUrl	https://some-domain.com/api/auth
   TokenUrl	https://some-domain.com/api/token
   ReturnUrl	https://zappysys.com/oauth
   ExtraAttributesForTokenRequest
   ExtraAttributesForAuthRequest
   DoNotIncludeCredentialsInHeader
   DoNotIncludeCredentialsInBody
   RenewBeforeSec
   ExtraHeaders (e.g. x-hdr1:AAA||x-hdr2:BBB)
   ContentType
   EnableCodeVerifier
   RemoveAuthHeader
   CustomAuthHeader
   CustomTokenPrefix
   RetryMode	RetryWhenStatusCodeMatch
   RetryStatusCodeList	429
   RetryCountMax	5
   RetryMultiplyWaitTime	True
   IgnoreSSLCertificateErrors
   SslVersion

   

7. Once the data source connection has been configured, it's time to configure the SQL query. Select the Preview tab and then click Query Builder button to configure the SQL query:

   

   ZappySys API Driver - OData

   OData Connector can be used to integrated any REST API which supports OData Standard. You can view tables, read data from tables using this connector. It also comes with some example OData Services to get started.

   OdataDSN

   

8. Start by selecting the Table or Endpoint you are interested in and then configure the parameters. This will generate a query that we will use in JAVA to retrieve data from OData. Hit OK button to use this query in the next step.

   SELECT * FROM Customers

   
   Some parameters configured in this window will be passed to the OData API, e.g. filtering parameters. It means that filtering will be done on the server side (instead of the client side), enabling you to get only the meaningful data much faster.

9. Now hit Preview Data button to preview the data using the generated SQL query. If you are satisfied with the result, use this query in JAVA:

   

   ZappySys API Driver - OData

   OData Connector can be used to integrated any REST API which supports OData Standard. You can view tables, read data from tables using this connector. It also comes with some example OData Services to get started.

   OdataDSN

   SELECT * FROM Customers

   
   You can also access data quickly from the tables dropdown by selecting <Select table>.
   A WHERE clause, LIMIT keyword will be performed on the client side, meaning that the whole result set will be retrieved from the OData API first, and only then the filtering will be applied to the data. If possible, it is recommended to use parameters in Query Builder to filter the data on the server side (in OData servers).

10. Click OK to finish creating the data source.

Read data in Java from the DSN

1. Java code to get the data:
   

   "jdbc:sqlserver://localhost:5000;databasename=OdataDSN;user=tdsuser;password=test"

   

2. When you run the code it will make the API call and read the data:
   

3. Here is Java program's code in text format:

   
   //Step-1: Install ZappySys ODBC PowerPack and Configure Data Gateway
   
   //Step-2:Assuming the Microsoft SQL Server JDBC Driver is in below folder
   //C:\Program Files\Microsoft Jdbc Driver 6.0 for SQL Server\sqljdbc_6.0\enu\auth\x64
   package padaone;
   
   import java.sql.*;
   
   public class zappy {
   
       public static void main(String[] args) {
   
           // Create a variable for the connection string.
           String connectionUrl = "jdbc:sqlserver://localhost:5000;databasename=OdataDSN;user=test;password=test";
   
           // Declare the JDBC objects.
           Connection con = null;
           Statement stmt = null;
           ResultSet rs = null;
   
               try {
                   // Establish the connection.
                   Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
                   con = DriverManager.getConnection(connectionUrl);
   
                   // Create and execute an SQL statement that returns some data.
                   String SQL = "SELECT Country , SUM(UnitPrice * Quantity) Total " 
                              + "FROM value " 
                              + "GROUP BY Country "
                              + "WITH (SRC='https://services.odata.org/V3/Northwind/Northwind.svc/Invoices?$format=json')";
                   stmt = con.createStatement();
                   rs = stmt.executeQuery(SQL);
   
                   // Iterate through the data in the result set and display it.
                   while (rs.next()) {
                       System.out.println(rs.getString(1) + " " + rs.getString(2));
                   }
               }
   
           // Handle any errors that may have occurred.
           catch (Exception e) {
               e.printStackTrace();
           } 
           
           finally {
               if (rs != null) try { rs.close(); } catch (Exception e) {}
               if (stmt != null) try { stmt.close(); } catch (Exception e) {}
               if (con != null) try { con.close(); } catch (Exception e) {}
           }
       }
   }

Actions supported by OData Connector

Learn how to perform common OData actions directly in JAVA with these how-to guides:

• Generic Read Data (JSON API)
• Generic Read Data (XML API)
• List Tables (JSON API)
• List Tables (XML API)
• Read [Dynamic Endpoint]
• Generic Request
• Generic Request (Bulk Write)

Conclusion

In this article we showed you how to connect to OData in JAVA and integrate data without any coding, saving you time and effort. It's worth noting that ZappySys API Driver allows you to connect not only to OData, but to any Java application that supports JDBC (just use a different JDBC driver and configure it appropriately).

We encourage you to download OData Connector for JAVA and see how easy it is to use it for yourself or your team.

If you have any questions, feel free to contact ZappySys support team. You can also open a live chat immediately by clicking on the chat icon below.

Download OData Connector for JAVA Documentation

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