/**
*    Copyright 2012, Big Switch Networks, Inc. 
*    Originally created by David Erickson, Stanford University
* 
*    Licensed under the Apache License, Version 2.0 (the "License"); you may
*    not use this file except in compliance with the License. You may obtain
*    a copy of the License at
*
*         http://www.apache.org/licenses/LICENSE-2.0
*
*    Unless required by applicable law or agreed to in writing, software
*    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
*    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
*    License for the specific language governing permissions and limitations
*    under the License.
**/

package net.floodlightcontroller.devicemanager.internal;

import java.util.Iterator;

/**
 * An iterator for handling device index queries
 */
public class DeviceIndexInterator implements Iterator<Device> {
    private DeviceManagerImpl deviceManager;
    private Iterator<Long> subIterator;

    /**
     * Construct a new device index iterator referring to a device manager
     * instance and an iterator over device keys
     * 
     * @param deviceManager the device manager
     * @param subIterator an iterator over device keys
     */
    public DeviceIndexInterator(DeviceManagerImpl deviceManager,
                                Iterator<Long> subIterator) {
        super();
        this.deviceManager = deviceManager;
        this.subIterator = subIterator;
    }

    @Override
    public boolean hasNext() {
        return subIterator.hasNext();
    }

    @Override
    public Device next() {
        Long next = subIterator.next();
        return deviceManager.deviceMap.get(next);
    }

    @Override
    public void remove() {
        subIterator.remove();
    }

}