org.apache.xerces.impl.dtd.XMLNSDTDValidator Maven / Gradle / Ivy
/*
* 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.dtd;
import org.apache.xerces.impl.XMLErrorReporter;
import org.apache.xerces.impl.msg.XMLMessageFormatter;
import org.apache.xerces.util.XMLSymbols;
import org.apache.xerces.xni.Augmentations;
import org.apache.xerces.xni.NamespaceContext;
import org.apache.xerces.xni.QName;
import org.apache.xerces.xni.XMLAttributes;
import org.apache.xerces.xni.XNIException;
/**
* The DTD validator. The validator implements a document
* filter: receiving document events from the scanner; validating
* the content and structure; augmenting the InfoSet, if applicable;
* and notifying the parser of the information resulting from the
* validation process.
* Formerly, this component also handled DTD events and grammar construction.
* To facilitate the development of a meaningful DTD grammar caching/preparsing
* framework, this functionality has been moved into the XMLDTDLoader
* class. Therefore, this class no longer implements the DTDFilter
* or DTDContentModelFilter interfaces.
*
* This component requires the following features and properties from the
* component manager that uses it:
*
* - http://xml.org/sax/features/namespaces
* - http://xml.org/sax/features/validation
* - http://apache.org/xml/features/validation/dynamic
* - http://apache.org/xml/properties/internal/symbol-table
* - http://apache.org/xml/properties/internal/error-reporter
* - http://apache.org/xml/properties/internal/grammar-pool
* - http://apache.org/xml/properties/internal/datatype-validator-factory
*
*
* @xerces.internal
*
* @author Elena Litani, IBM
*
* @version $Id: XMLNSDTDValidator.java 572055 2007-09-02 17:55:43Z mrglavas $
*/
public class XMLNSDTDValidator
extends XMLDTDValidator{
/** Attribute QName. */
private final QName fAttributeQName = new QName();
/** Bind namespaces */
protected final void startNamespaceScope (QName element, XMLAttributes attributes,
Augmentations augs) throws XNIException {
// add new namespace context
fNamespaceContext.pushContext();
if (element.prefix == XMLSymbols.PREFIX_XMLNS) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"ElementXMLNSPrefix",
new Object[]{element.rawname},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
// search for new namespace bindings
int length = attributes.getLength();
for (int i = 0; i < length; i++) {
String localpart = attributes.getLocalName(i);
String prefix = attributes.getPrefix(i);
// when it's of form xmlns="..." or xmlns:prefix="...",
// it's a namespace declaration. but prefix:xmlns="..." isn't.
if (prefix == XMLSymbols.PREFIX_XMLNS ||
prefix == XMLSymbols.EMPTY_STRING && localpart == XMLSymbols.PREFIX_XMLNS) {
// get the internalized value of this attribute
String uri = fSymbolTable.addSymbol(attributes.getValue(i));
// 1. "xmlns" can't be bound to any namespace
if (prefix == XMLSymbols.PREFIX_XMLNS && localpart == XMLSymbols.PREFIX_XMLNS) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"CantBindXMLNS",
new Object[]{attributes.getQName(i)},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
// 2. the namespace for "xmlns" can't be bound to any prefix
if (uri == NamespaceContext.XMLNS_URI) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"CantBindXMLNS",
new Object[]{attributes.getQName(i)},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
// 3. "xml" can't be bound to any other namespace than it's own
if (localpart == XMLSymbols.PREFIX_XML) {
if (uri != NamespaceContext.XML_URI) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"CantBindXML",
new Object[]{attributes.getQName(i)},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
}
// 4. the namespace for "xml" can't be bound to any other prefix
else {
if (uri ==NamespaceContext.XML_URI) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"CantBindXML",
new Object[]{attributes.getQName(i)},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
}
prefix = localpart != XMLSymbols.PREFIX_XMLNS ? localpart : XMLSymbols.EMPTY_STRING;
// http://www.w3.org/TR/1999/REC-xml-names-19990114/#dt-prefix
// We should only report an error if there is a prefix,
// that is, the local part is not "xmlns". -SG
if (uri == XMLSymbols.EMPTY_STRING && localpart != XMLSymbols.PREFIX_XMLNS) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"EmptyPrefixedAttName",
new Object[]{attributes.getQName(i)},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
continue;
}
// declare prefix in context
fNamespaceContext.declarePrefix(prefix, uri.length() != 0 ? uri : null);
}
}
// bind the element
String prefix = element.prefix != null
? element.prefix : XMLSymbols.EMPTY_STRING;
element.uri = fNamespaceContext.getURI(prefix);
if (element.prefix == null && element.uri != null) {
element.prefix = XMLSymbols.EMPTY_STRING;
}
if (element.prefix != null && element.uri == null) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"ElementPrefixUnbound",
new Object[]{element.prefix, element.rawname},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
// bind the attributes
for (int i = 0; i < length; i++) {
attributes.getName(i, fAttributeQName);
String aprefix = fAttributeQName.prefix != null
? fAttributeQName.prefix : XMLSymbols.EMPTY_STRING;
String arawname = fAttributeQName.rawname;
if (arawname == XMLSymbols.PREFIX_XMLNS) {
fAttributeQName.uri = fNamespaceContext.getURI(XMLSymbols.PREFIX_XMLNS);
attributes.setName(i, fAttributeQName);
}
else if (aprefix != XMLSymbols.EMPTY_STRING) {
fAttributeQName.uri = fNamespaceContext.getURI(aprefix);
if (fAttributeQName.uri == null) {
fErrorReporter.reportError(XMLMessageFormatter.XMLNS_DOMAIN,
"AttributePrefixUnbound",
new Object[]{element.rawname,arawname,aprefix},
XMLErrorReporter.SEVERITY_FATAL_ERROR);
}
attributes.setName(i, fAttributeQName);
}
}
// verify that duplicate attributes don't exist
// Example: