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/*
* 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 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 org.apache.naming.resources;
import java.util.Enumeration;
import java.util.Vector;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
/**
* Naming enumeration implementation.
*
* @author Remy Maucherat
*/
public class RecyclableNamingEnumeration<E>
implements NamingEnumeration<E> {
// ----------------------------------------------------------- Constructors
public RecyclableNamingEnumeration(Vector<E> entries) {
this.entries = entries;
recycle();
}
// -------------------------------------------------------------- Variables
/**
* Entries.
*/
protected Vector<E> entries;
/**
* Underlying enumeration.
*/
protected Enumeration<E> enumeration;
// --------------------------------------------------------- Public Methods
/**
* Retrieves the next element in the enumeration.
*/
@Override
public E next()
throws NamingException {
return nextElement();
}
/**
* Determines whether there are any more elements in the enumeration.
*/
@Override
public boolean hasMore()
throws NamingException {
return enumeration.hasMoreElements();
}
/**
* Closes this enumeration.
*/
@Override
public void close() throws NamingException {
// NO-OP
}
@Override
public boolean hasMoreElements() {
return enumeration.hasMoreElements();
}
@Override
public E nextElement() {
return enumeration.nextElement();
}
// -------------------------------------------------------- Package Methods
/**
* Recycle.
*/
void recycle() {
enumeration = entries.elements();
}
}
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