jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/doclets/internal/toolkit/util/DocLink.java@400a4e8accd3

     1 /*

     2  * Copyright (c) 2012, 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  */

    26 package com.sun.tools.doclets.internal.toolkit.util;

    28 /**

    29  * Abstraction for simple relative URIs, consisting of a path,

    30  * an optional query, and an optional fragment. DocLink objects can

    31  * be created by the constructors below or from a DocPath using the

    32  * convenience methods, {@link DocPath#fragment fragment} and

    33  * {@link DocPath#query query}.

    34  *

    35  *  <p><b>This is NOT part of any supported API.

    36  *  If you write code that depends on this, you do so at your own risk.

    37  *  This code and its internal interfaces are subject to change or

    38  *  deletion without notice.</b>

    39  *

    40  */

    41 public class DocLink {

    42     final String path;

    43     final String query;

    44     final String fragment;

    46     /** Create a DocLink representing the URI {@code #fragment}. */

    47     public static DocLink fragment(String fragment) {

    48         return new DocLink((String) null, (String) null, fragment);

    49     }

    51     /** Create a DocLink representing the URI {@code path}. */

    52     public DocLink(DocPath path) {

    53         this(path.getPath(), null, null);

    54     }

    56     /**

    57      * Create a DocLink representing the URI {@code path?query#fragment}.

    58      * query and fragment may be null.

    59      */

    60     public DocLink(DocPath path, String query, String fragment) {

    61         this(path.getPath(), query, fragment);

    62     }

    64     /**

    65      * Create a DocLink representing the URI {@code path?query#fragment}.

    66      * Any of the component parts may be null.

    67      */

    68     public DocLink(String path, String query, String fragment) {

    69         this.path = path;

    70         this.query = query;

    71         this.fragment = fragment;

    72     }

    74     /**

    75      * Return the link in the form "path?query#fragment", omitting any empty

    76      * components.

    77      */

    78     @Override

    79     public String toString() {

    80         // common fast path

    81         if (path != null && isEmpty(query) && isEmpty(fragment))

    82             return path;

    84         StringBuilder sb = new StringBuilder();

    85         if (path != null)

    86             sb.append(path);

    87         if (!isEmpty(query))

    88             sb.append("?").append(query);

    89         if (!isEmpty(fragment))

    90             sb.append("#").append(fragment);

    91         return sb.toString();

    92     }

    94     private static boolean isEmpty(String s) {

    95         return (s == null) || s.isEmpty();

    96     }

    97 }

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