content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package mf.org.apache.xerces.impl.dv.dtd;
  
  import mf.org.apache.xerces.impl.dv.DatatypeValidator;
  import mf.org.apache.xerces.impl.dv.InvalidDatatypeValueException;
  import mf.org.apache.xerces.impl.dv.ValidationContext;
  import mf.org.apache.xerces.util.XMLChar;
  
  
  /**
   * <P>IDDatatypeValidator - ID represents the ID attribute
   * type from XML 1.0 Recommendation. The value space
   * od ID is the set of all strings that match the
   * NCName production and have been used in an XML
   * document. The lexical space of ID is the set of all
   * strings that match the NCName production.</P>
   * <P>The value space of ID is scoped to a specific
   * instance document.</P>
   * <P>The following constraint applies:
   * An ID must not appear more than once in an XML
   * document as a value of this type; i.e., ID values
   * must uniquely identify the elements which bear
   * them.</P>
   *
   * @author Jeffrey Rodriguez, IBM
   * @author Sandy Gao, IBM
   * @version $Id: IDDatatypeValidator.java 699892 2008-09-28 21:08:27Z mrglavas $
   * @xerces.internal
   */
  public class IDDatatypeValidator implements DatatypeValidator {
  
      // construct an ID datatype validator
      public IDDatatypeValidator() {
      }
  
      /**
       * Checks that "content" string is valid ID value.
       * If invalid a Datatype validation exception is thrown.
       *
       * @param content the string value that needs to be validated
       * @param context the validation context
       * @throws InvalidDatatypeException if the content is
       *                                  invalid according to the rules for the validators
       * @see InvalidDatatypeValueException
       */
      @Override
      public void validate(String content, ValidationContext context) throws InvalidDatatypeValueException {
  
          //Check if is valid key-[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
          if (context.useNamespaces()) {
              if (!XMLChar.isValidNCName(content)) {
                  throw new InvalidDatatypeValueException("IDInvalidWithNamespaces", new Object[]{content});
              }
          } else {
              if (!XMLChar.isValidName(content)) {
                  throw new InvalidDatatypeValueException("IDInvalid", new Object[]{content});
              }
          }
  
          if (context.isIdDeclared(content)) {
              throw new InvalidDatatypeValueException("IDNotUnique", new Object[]{content});
          }
  
          context.addId(content);
      }
  
  }
  