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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 *  Copyright 1999-2004 The Apache Software Foundation
 *  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
 *  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.tomcat.util.collections;

import java.util.Enumeration;

/** Enumerate the distinct header names.
    Each nextElement() is O(n) ( a comparation is
    done with all previous elements ).

    This is less frequesnt than add() -
    we want to keep add O(1).
public final class MultiMapNamesEnumeration implements Enumeration {
    int pos;
    int size;
    String next;
    MultiMap headers;

    // toString and unique options are not implemented -
    // we allways to toString and unique.
    /** Create a new multi-map enumeration.
     * @param  headers the collection to enumerate 
     * @param  toString convert each name to string 
     * @param  unique return only unique names
    MultiMapNamesEnumeration(MultiMap headers, boolean toString,
			     boolean unique) {
	size = headers.size();

    private void findNext() {
	for(  ; pos< size; pos++ ) {
	    next=headers.getName( pos ).toString();
	    for( int j=0; j
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