jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/dtdparser/XmlNames.java@9c07ef4934dd

     1 /*

     2  * Copyright (c) 2009, 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.xml.internal.dtdparser;

    29 /**

    30  * This class contains static methods used to determine whether identifiers

    31  * may appear in certain roles in XML documents.  Such methods are used

    32  * both to parse and to create such documents.

    33  *

    34  * @author David Brownell

    35  * @version 1.1, 00/08/05

    36  */

    37 public class XmlNames {

    38     private XmlNames() {

    39     }

    42     /**

    43      * Returns true if the value is a legal XML name.

    44      *

    45      * @param value the string being tested

    46      */

    47     public static boolean isName(String value) {

    48         if (value == null)

    49             return false;

    51         char c = value.charAt(0);

    52         if (!XmlChars.isLetter(c) && c != '_' && c != ':')

    53             return false;

    54         for (int i = 1; i < value.length(); i++)

    55             if (!XmlChars.isNameChar(value.charAt(i)))

    56                 return false;

    57         return true;

    58     }

    60     /**

    61      * Returns true if the value is a legal "unqualified" XML name, as

    62      * defined in the XML Namespaces proposed recommendation.

    63      * These are normal XML names, except that they may not contain

    64      * a "colon" character.

    65      *

    66      * @param value the string being tested

    67      */

    68     public static boolean isUnqualifiedName(String value) {

    69         if (value == null || value.length() == 0)

    70             return false;

    72         char c = value.charAt(0);

    73         if (!XmlChars.isLetter(c) && c != '_')

    74             return false;

    75         for (int i = 1; i < value.length(); i++)

    76             if (!XmlChars.isNCNameChar(value.charAt(i)))

    77                 return false;

    78         return true;

    79     }

    81     /**

    82      * Returns true if the value is a legal "qualified" XML name, as defined

    83      * in the XML Namespaces proposed recommendation.  Qualified names are

    84      * composed of an optional prefix (an unqualified name), followed by a

    85      * colon, and a required "local part" (an unqualified name).  Prefixes are

    86      * declared, and correspond to particular URIs which scope the "local

    87      * part" of the name.  (This method cannot check whether the prefix of a

    88      * name has been declared.)

    89      *

    90      * @param value the string being tested

    91      */

    92     public static boolean isQualifiedName(String value) {

    93         if (value == null)

    94             return false;

    96         // [6] QName ::= (Prefix ':')? LocalPart

    97         // [7] Prefix ::= NCName

    98         // [8] LocalPart ::= NCName

   100         int first = value.indexOf(':');

   102         // no Prefix, only check LocalPart

   103         if (first <= 0)

   104             return isUnqualifiedName(value);

   106         // Prefix exists, check everything

   108         int last = value.lastIndexOf(':');

   109         if (last != first)

   110             return false;

   112         return isUnqualifiedName(value.substring(0, first))

   113                 && isUnqualifiedName(value.substring(first + 1));

   114     }

   116     /**

   117      * This method returns true if the identifier is a "name token"

   118      * as defined in the XML specification.  Like names, these

   119      * may only contain "name characters"; however, they do not need

   120      * to have letters as their initial characters.  Attribute values

   121      * defined to be of type NMTOKEN(S) must satisfy this predicate.

   122      *

   123      * @param token the string being tested

   124      */

   125     public static boolean isNmtoken(String token) {

   126         int length = token.length();

   128         for (int i = 0; i < length; i++)

   129             if (!XmlChars.isNameChar(token.charAt(i)))

   130                 return false;

   131         return true;

   132     }

   135     /**

   136      * This method returns true if the identifier is a "name token" as

   137      * defined by the XML Namespaces proposed recommendation.

   138      * These are like XML "name tokens" but they may not contain the

   139      * "colon" character.

   140      *

   141      * @param token the string being tested

   142      * @see #isNmtoken

   143      */

   144     public static boolean isNCNmtoken(String token) {

   145         return isNmtoken(token) && token.indexOf(':') < 0;

   146     }

   147 }

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