001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.message; 029 030import java.io.Serializable; 031 032import org.apache.http.Header; 033import org.apache.http.HeaderElement; 034import org.apache.http.ParseException; 035import org.apache.http.annotation.ThreadingBehavior; 036import org.apache.http.annotation.Contract; 037import org.apache.http.util.Args; 038 039/** 040 * Basic implementation of {@link Header}. 041 * 042 * @since 4.0 043 */ 044@Contract(threading = ThreadingBehavior.IMMUTABLE) 045public class BasicHeader implements Header, Cloneable, Serializable { 046 047 private static final long serialVersionUID = -5427236326487562174L; 048 049 private final String name; 050 private final String value; 051 052 /** 053 * Constructor with name and value 054 * 055 * @param name the header name 056 * @param value the header value 057 */ 058 public BasicHeader(final String name, final String value) { 059 super(); 060 this.name = Args.notNull(name, "Name"); 061 this.value = value; 062 } 063 064 @Override 065 public String getName() { 066 return this.name; 067 } 068 069 @Override 070 public String getValue() { 071 return this.value; 072 } 073 074 @Override 075 public String toString() { 076 // no need for non-default formatting in toString() 077 return BasicLineFormatter.INSTANCE.formatHeader(null, this).toString(); 078 } 079 080 @Override 081 public HeaderElement[] getElements() throws ParseException { 082 if (this.value != null) { 083 // result intentionally not cached, it's probably not used again 084 return BasicHeaderValueParser.parseElements(this.value, null); 085 } else { 086 return new HeaderElement[] {}; 087 } 088 } 089 090 @Override 091 public Object clone() throws CloneNotSupportedException { 092 return super.clone(); 093 } 094 095}