#4 Intro to Xtend

Jun 25, 2012 | 9 minutes | Beginners, Xtend

Introduction to the new Xtend language. A simple peace of java code get converted to the Xtend using type inference, extension methods and closures.

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Xtend language: http://www.eclipse.org/xtend/

Java code:

              java
                    
        import java.util.ArrayList;
import java.util.List;

public class UserTools {
	public static List<String> getAdminNameList(List<User> list) {
		List<String> result = new ArrayList<String>();
		for (User user : list) {
			if (user.isAdmin()) {
				result.add(user.getName());
			}
		}
		return result;
	}
}
        
        
        
        
        
        
        
        
        
      
import java.util.ArrayList;
import java.util.List;

public class UserTools {
        public static List<String> getAdminNameList(List<User> list) {
                List<String> result = new ArrayList<String>();
                for (User user : list) {
                        if (user.isAdmin()) {
                                result.add(user.getName());
                        }
                }
                return result;
        }
}

Corresponding Xtend code:

              xtend
                    
        import java.util.List

class UserTools {
	def static getAdminNameList(List<User> list) {
		list.filter [ admin ].map [ name ]
	}
}
        
import java.util.List

class UserTools {
        def static getAdminNameList(List<User> list) {
                list.filter [ admin ].map [ name ]
        }
}