1 /*

     2  * Copyright (c) 2015, 2018, 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  * questions.

    24  */

    25 

    26 package java.net.http.internal.common;

    27 

    28 import java.net.http.HttpHeaders;

    29 import java.util.ArrayList;

    30 import java.util.Collections;

    31 import java.util.List;

    32 import java.util.Map;

    33 import java.util.Set;

    34 import java.util.TreeMap;

    35 

    36 /**

    37  * Implementation of HttpHeaders.

    38  */

    39 public class HttpHeadersImpl extends HttpHeaders {

    40 

    41     private final TreeMap<String,List<String>> headers;

    42 

    43     public HttpHeadersImpl() {

    44         headers = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);

    45     }

    46 

    47     @Override

    48     public Map<String, List<String>> map() {

    49         return Collections.unmodifiableMap(headers);

    50     }

    51 

    52     // package private mutators

    53 

    54     public HttpHeadersImpl deepCopy() {

    55         HttpHeadersImpl h1 = new HttpHeadersImpl();

    56         for (Map.Entry<String,List<String>> entry : headers.entrySet()) {

    57             List<String> valuesCopy = new ArrayList<>(entry.getValue());

    58             h1.headers.put(entry.getKey(), valuesCopy);

    59         }

    60         return h1;

    61     }

    62 

    63     public void addHeader(String name, String value) {

    64         headers.computeIfAbsent(name, k -> new ArrayList<>(1))

    65                .add(value);

    66     }

    67 

    68     public void setHeader(String name, String value) {

    69         List<String> values = new ArrayList<>(1); // most headers has one value

    70         values.add(value);

    71         headers.put(name, values);

    72     }

    73 }