utils/src/com/cloud/utils/EnumerationImpl.java

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// 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 com.cloud.utils;

import java.util.Enumeration;
import java.util.Iterator;

/**
 * 
 * Why the heck didn't Iterator extend from Enumeration, I will probably never know. Tell me Lee Boyton!
 **/
public class EnumerationImpl<T> implements Enumeration<T>, Iterator<T> {
    Iterator<T> _it;

    // Can't use this.
    protected EnumerationImpl() {
    }

    public EnumerationImpl(Iterator<T> it) {
        _it = it;
    }

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

    @Override
    public T nextElement() {
        return _it.next();
    }

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

    @Override
    public T next() {
        return _it.next();
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("Enumerations do not support remove operation");
    }
}