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 API
Java
// Java Program to Implement RoleList API // Importing libraries import 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_