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A processor for parsing, validating, serializing and manipulating XML, written in Java
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/*
* 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 org.apache.xerces.impl.dv.dtd;
import org.apache.xerces.impl.dv.DatatypeValidator;
import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.ValidationContext;
import org.apache.xerces.util.XMLChar;
/**
* 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.
* The value space of ID is scoped to a specific
* instance document.
* 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.
*
* @xerces.internal
*
* @author Jeffrey Rodriguez, IBM
* @author Sandy Gao, IBM
*
* @version $Id$
*/
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
*/
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);
}
}