1 /*
   2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  */
  24 package java.net.http;
  25 
  26 import java.util.Collections;
  27 import java.util.HashMap;
  28 import java.util.LinkedList;
  29 import java.util.List;
  30 import java.util.Map;
  31 import java.util.Optional;
  32 import java.util.Set;
  33 
  34 /**
  35  * Implementation of HttpHeaders.
  36  */
  37 class HttpHeadersImpl implements HttpHeaders {
  38     // key is lowercase
  39     private final HashMap<String,List<String>> headers;
  40 
  41     public HttpHeadersImpl() {
  42         headers = new HashMap<>();
  43     }
  44 
  45     @Override
  46     public Optional<String> firstValue(String name) {
  47         name = name.toLowerCase();
  48         List<String> l = headers.get(name);
  49         return Optional.ofNullable(l == null ? null : l.get(0));
  50     }
  51 
  52     @Override
  53     public List<String> allValues(String name) {
  54         name = name.toLowerCase();
  55         return headers.get(name);
  56     }
  57 
  58     @Override
  59     public Map<String, List<String>> map() {
  60         return Collections.unmodifiableMap(headers);
  61     }
  62 
  63     Map<String, List<String>> directMap() {
  64         return headers;
  65     }
  66 
  67     // package private mutators
  68 
  69     public HttpHeadersImpl deepCopy() {
  70         HttpHeadersImpl h1 = new HttpHeadersImpl();
  71         HashMap<String,List<String>> headers1 = h1.headers;
  72         Set<String> keys = headers.keySet();
  73         for (String key : keys) {
  74             List<String> vals = headers.get(key);
  75             LinkedList<String> vals1 = new LinkedList<>(vals);
  76             headers1.put(key, vals1);
  77         }
  78         return h1;
  79     }
  80 
  81     private List<String> getOrCreate(String name) {
  82         List<String> l = headers.get(name);
  83         if (l == null) {
  84             l = new LinkedList<>();
  85             headers.put(name, l);
  86         }
  87         return l;
  88     }
  89 
  90     void addHeader(String name, String value) {
  91         name = name.toLowerCase();
  92         List<String> l = getOrCreate(name);
  93         l.add(value);
  94     }
  95 
  96     void setHeader(String name, String value) {
  97         name = name.toLowerCase();
  98         List<String> l = getOrCreate(name);
  99         l.clear();
 100         l.add(value);
 101     }
 102 
 103     @Override
 104     public Optional<Long> firstValueAsLong(String name) {
 105         name = name.toLowerCase();
 106         List<String> l = headers.get(name);
 107         if (l == null) {
 108             return Optional.ofNullable(null);
 109         } else {
 110             String v = l.get(0);
 111             Long lv = Long.parseLong(v);
 112             return Optional.of(lv);
 113         }
 114     }
 115 
 116     void clear() {
 117         headers.clear();
 118     }
 119 }