1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.xerces.internal.impl.dv.dtd;
  23 
  24 import com.sun.org.apache.xerces.internal.impl.dv.*;
  25 import com.sun.org.apache.xerces.internal.util.XMLChar;
  26 
  27 /**
  28  * <P>IDDatatypeValidator - ID represents the ID attribute
  29  * type from XML 1.0 Recommendation. The value space
  30  * od ID is the set of all strings that match the
  31  * NCName production and have been used in an XML
  32  * document. The lexical space of ID is the set of all
  33  * strings that match the NCName production.</P>
  34  * <P>The value space of ID is scoped to a specific
  35  * instance document.</P>
  36  * <P>The following constraint applies:
  37  * An ID must not appear more than once in an XML
  38  * document as a value of this type; i.e., ID values
  39  * must uniquely identify the elements which bear
  40  * them.</P>
  41  *
  42  * @xerces.internal
  43  *
  44  * @author Jeffrey Rodriguez, IBM
  45  * @author Sandy Gao, IBM
  46  *
  47  */
  48 public class IDDatatypeValidator implements DatatypeValidator {
  49 
  50     // construct an ID datatype validator
  51     public IDDatatypeValidator() {
  52     }
  53 
  54     /**
  55      * Checks that "content" string is valid ID value.
  56      * If invalid a Datatype validation exception is thrown.
  57      *
  58      * @param content       the string value that needs to be validated
  59      * @param context       the validation context
  60      * @throws InvalidDatatypeException if the content is
  61      *         invalid according to the rules for the validators
  62      * @see InvalidDatatypeValueException
  63      */
  64     public void validate(String content, ValidationContext context) throws InvalidDatatypeValueException {
  65 
  66         //Check if is valid key-[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
  67         if(context.useNamespaces()) {
  68             if (!XMLChar.isValidNCName(content)) {
  69                 throw new InvalidDatatypeValueException("IDInvalidWithNamespaces", new Object[]{content});
  70             }
  71         }
  72         else {
  73             if (!XMLChar.isValidName(content)) {
  74                 throw new InvalidDatatypeValueException("IDInvalid", new Object[]{content});
  75             }
  76         }
  77 
  78         if (context.isIdDeclared(content)) {
  79             throw new InvalidDatatypeValueException("IDNotUnique", new Object[]{content});
  80         }
  81 
  82         context.addId(content);
  83     }
  84 
  85 }