/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.spi.ior;

import java.util.List;

import java.util.ArrayList;

import java.util.Iterator;

import com.sun.corba.se.impl.ior.FreezableList ;

import com.sun.corba.se.spi.ior.TaggedComponent ;

import com.sun.corba.se.spi.ior.Identifiable ;

/** Convenience class for defining objects that contain lists of Identifiables.

 * Mainly implements iteratorById.  Also note that the constructor creates the

 * list, which here is always an ArrayList, as this is much more efficient overall

 * for short lists.

 * @author  Ken Cavanaugh

 */

public class IdentifiableContainerBase extends FreezableList

{

    /** Create this class with an empty list of identifiables.

     * The current implementation uses an ArrayList.

     */

    public IdentifiableContainerBase()

    {

        super( new ArrayList() ) ;

    }

    /** Return an iterator which iterates over all contained Identifiables

     * with type given by id.

     */

    public Iterator iteratorById( final int id)

    {

        return new Iterator() {

            Iterator iter = IdentifiableContainerBase.this.iterator() ;

            Object current = advance() ;

            private Object advance()

            {

                while (iter.hasNext()) {

                    Identifiable ide = (Identifiable)(iter.next()) ;

                    if (ide.getId() == id)

                        return ide ;

                }

                return null ;

            }

            public boolean hasNext()

            {

                return current != null ;

            }

            public Object next()

            {

                Object result = current ;

                current = advance() ;

                return result ;

            }

            public void remove()

            {

                iter.remove() ;

            }

        } ;

    }

}