A Role List represents a list of roles (Role objects). It is used as a parameter when creating a relation, and when attempting to set multiple roles in a relationship or via setRoles() method. It is returned as part of a RoleResult, to provide roles successfully obtain the role.
- java.lang.Object
- java.util.AbstractCollection<E>
- java.util.AbstractList<E>
- java.util.ArrayList<Object>
- javax.management.relation.RoleList
Syntax:
public class RoleList extends ArrayList<Object> ;
Methods for constructing a Role list
- Role List(): Constructs an empty Role List.
- Role List(int initial_capacity): Constructs an empty Role List with the initial capacity specified.
- Role List(List<Role> list): Constructs a Role List containing the elements of the List specified, in the order in which they are returned by the List’s iterator.
Implementation: All Implementable Interfaces are given below:
Java Program to Implement RoleList APIÂ
Java
// Java Program to Implement RoleList API  // Importing librariesimport java.util.Collection;import java.util.LinkedList;import java.util.List;import javax.management.MalformedObjectNameException;import javax.management.ObjectName;import javax.management.relation.Role;import javax.management.relation.RoleList;  public class GFG {      private RoleList rList;      // Create an empty RoleList    public GFG() { rList = new RoleList(); }      // Create an empty RoleList    // with the initial capacity    public GFG(int inicapacity)    {        rList = new RoleList(inicapacity);    }      // Create a RoleList containing the elements of the List    // specified in order in which they are returned by the    // List's iterator    public GFG(List<Role> list)    {        rList = new RoleList(list);    }      // Inserts element at the specified position in list    public void add(int index, Object element)    {        rList.add(index, element);    }      // Inserts the role specified at the position    // specified as an element    public void add(int index, Role role)    {        rList.add(index, role);    }      // Appends the specified element to the end of List    public boolean add(Object o)     {      return rList.add(o);     }      // Adds the Role specified as the last element    public void add(Role role)     {       rList.add(role);     }      // Appends all elements in the specified collections    // to the end of list, in the order that    // they are returned by the specified collection's    // Iterator    public boolean addAll(Collection<?> c)    {        return rList.addAll(c);    }      // Inserts all elements in the specified collection into    // list starting from the specified position.    public boolean addAll(int index, Collection<?> c)    {        return rList.addAll(index, c);    }      // Inserts all elements in the RoleList specified into    // list, starting from the specified position,in the    // order in which they are returned by the Iterator    public boolean addAll(int index, RoleList roleList)    {        return this.rList.addAll(index, rList);    }      // Append all elements in the RoleList specified to the    // end, in the order in which they are returned.    public boolean addAll(RoleList rList)    {        return rList.addAll(rList);    }      // Return a view of list as a List<Role>    public List<Role> asList()     {       return rList.asList();     }      // Replace the element at the specified position in list    // with the specified element    public Object set(int index, Object element)    {        return rList.set(index, element);    }      // Set the element at the position specified    // to be the role specified    public void set(int index, Role role)    {        rList.set(index, role);    }      // Main driver method    public static void main(String[] arg)        throws MalformedObjectNameException    {        GFG rList = new GFG();        List<ObjectName> rlist1            = new LinkedList<ObjectName>();        rlist1.add(            new ObjectName("domain1_", "key1_", "value1_"));        rlist1.add(            new ObjectName("domain2_", "key2_", "value3_"));        rList.add(0, new Role("1_rolename", rlist1));          List<ObjectName> rList2            = new LinkedList<ObjectName>();        rList2.add(            new ObjectName("domain3_", "key3_", "value3_"));        rList2.add(            new ObjectName("domain4_", "key4_", "value4_"));        rList.add(1, new Role("2_rolename", rList2));          List<Role> list = rList.asList();        int index = 0;        while (index < list.size()) {            System.out.println(list.get(index++) + " ");        }        System.out.println();    }} |
Output
role name: 1_rolename; role value: domain1_:key1_=value1_, domain2_:key2_=value3_ role name: 2_rolename; role value: domain3_:key3_=value3_, domain4_:key4_=value4_
