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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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.http;

/**
 * One element of an HTTP {@link Header header} value consisting of
 * a name / value pair and a number of optional name / value parameters.
 * 

* Some HTTP headers (such as the set-cookie header) have values that * can be decomposed into multiple elements. Such headers must be in the * following form: *

*
 * header  = [ element ] *( "," [ element ] )
 * element = name [ "=" [ value ] ] *( ";" [ param ] )
 * param   = name [ "=" [ value ] ]
 *
 * name    = token
 * value   = ( token | quoted-string )
 *
 * token         = 1*<any char except "=", ",", ";", <"> and
 *                       white space>
 * quoted-string = <"> *( text | quoted-char ) <">
 * text          = any char except <">
 * quoted-char   = "\" char
 * 
*

* Any amount of white space is allowed between any part of the * header, element or param and is ignored. A missing value in any * element or param will be stored as the empty {@link String}; * if the "=" is also missing null will be stored instead. * * @since 4.0 */ public interface HeaderElement { /** * Returns header element name. * * @return header element name */ String getName(); /** * Returns header element value. * * @return header element value */ String getValue(); /** * Returns an array of name / value pairs. * * @return array of name / value pairs */ NameValuePair[] getParameters(); /** * Returns the first parameter with the given name. * * @param name parameter name * * @return name / value pair */ NameValuePair getParameterByName(String name); /** * Returns the total count of parameters. * * @return parameter count */ int getParameterCount(); /** * Returns parameter with the given index. * * @param index index * @return name / value pair */ NameValuePair getParameter(int index); }





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