// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.security;

import java.util.*;

import org.litesoft.uispecification.*;

public interface ViewAccessControlManager
{
    boolean loginRequired();

    boolean allowAccessTo( ViewDef pViewDef );

    public static final ViewAccessControlManager NOTHING = new ViewAccessControlManager()
    {
        public boolean loginRequired()
        {
            return true;
        }

        public boolean allowAccessTo( ViewDef pViewDef )
        {
            return false;
        }
    };

    public class Only implements ViewAccessControlManager
    {
        public Only( ViewDef... pViewDefs )
        {
            add( pViewDefs );
        }

        public Only( List<ViewDef[]> pViewDefs )
        {
            for ( ViewDef[] zViewDefs : pViewDefs )
            {
                add( zViewDefs );
            }
        }

        public boolean loginRequired()
        {
            return mOnly.isEmpty();
        }

        public boolean allowAccessTo( ViewDef pViewDef )
        {
            return mOnly.contains( pViewDef );
        }

        private Set<ViewDef> mOnly = new HashSet<ViewDef>();

        private void add( ViewDef[] pViewDefs )
        {
            if ( pViewDefs != null )
            {
                for ( ViewDef zViewDef : pViewDefs )
                {
                    if ( zViewDef != null )
                    {
                        mOnly.add( zViewDef );
                    }
                }
            }
        }
    }
}