/*
* 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.dom;
import org.apache.xerces.xs.XSSimpleTypeDefinition;
import org.apache.xerces.xs.XSTypeDefinition;
import org.apache.xerces.impl.dv.xs.XSSimpleTypeDecl;
import org.apache.xerces.impl.xs.XSComplexTypeDecl;
import org.apache.xerces.util.URI;
import org.apache.xerces.xni.NamespaceContext;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
/**
* ElementNSImpl inherits from ElementImpl and adds namespace support.
* <P>
* The qualified name is the node name, and we store localName which is also
* used in all queries. On the other hand we recompute the prefix when
* necessary.
*
* @xerces.internal
*
* @author Elena litani, IBM
* @author Neeraj Bajaj, Sun Microsystems
* @version $Id: ElementNSImpl.java 449328 2006-09-23 22:58:23Z mrglavas $
*/
public class ElementNSImpl
extends ElementImpl {
//
// Constants
//
/** Serialization version. */
static final long serialVersionUID = -9142310625494392642L;
static final String xmlURI = "http://www.w3.org/XML/1998/namespace";
//
// Data
//
/** DOM2: Namespace URI. */
protected String namespaceURI;
/** DOM2: localName. */
protected String localName;
/** DOM3: type information */
// REVISIT: we are losing the type information in DOM during serialization
transient XSTypeDefinition type;
protected ElementNSImpl() {
super();
}
/**
* DOM2: Constructor for Namespace implementation.
*/
protected ElementNSImpl(CoreDocumentImpl ownerDocument,
String namespaceURI,
String qualifiedName)
throws DOMException
{
super(ownerDocument, qualifiedName);
setName(namespaceURI, qualifiedName);
}
private void setName(String namespaceURI, String qname) {
String prefix;
// DOM Level 3: namespace URI is never empty string.
this.namespaceURI = namespaceURI;
if (namespaceURI != null) {
//convert the empty string to 'null'
this.namespaceURI = (namespaceURI.length() == 0) ? null : namespaceURI;
}
int colon1, colon2 ;
//NAMESPACE_ERR:
//1. if the qualified name is 'null' it is malformed.
//2. or if the qualifiedName is null and the namespaceURI is different from null,
// We dont need to check for namespaceURI != null, if qualified name is null throw DOMException.
if(qname == null){
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.DOM_DOMAIN,
"NAMESPACE_ERR",
null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
}
else{
colon1 = qname.indexOf(':');
colon2 = qname.lastIndexOf(':');
}
ownerDocument.checkNamespaceWF(qname, colon1, colon2);
if (colon1 < 0) {
// there is no prefix
localName = qname;
if (ownerDocument.errorChecking) {
ownerDocument.checkQName(null, localName);
if (qname.equals("xmlns")
&& (namespaceURI == null
|| !namespaceURI.equals(NamespaceContext.XMLNS_URI))
|| (namespaceURI!=null && namespaceURI.equals(NamespaceContext.XMLNS_URI)
&& !qname.equals("xmlns"))) {
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.DOM_DOMAIN,
"NAMESPACE_ERR",
null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
}
}
}//there is a prefix
else {
prefix = qname.substring(0, colon1);
localName = qname.substring(colon2 + 1);
//NAMESPACE_ERR:
//1. if the qualifiedName has a prefix and the namespaceURI is null,
//2. or if the qualifiedName has a prefix that is "xml" and the namespaceURI
//is different from " http://www.w3.org/XML/1998/namespace"
if (ownerDocument.errorChecking) {
if( namespaceURI == null || ( prefix.equals("xml") && !namespaceURI.equals(NamespaceContext.XML_URI) )){
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.DOM_DOMAIN,
"NAMESPACE_ERR",
null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
}
ownerDocument.checkQName(prefix, localName);
ownerDocument.checkDOMNSErr(prefix, namespaceURI);
}
}
}
// when local name is known
protected ElementNSImpl(CoreDocumentImpl ownerDocument,
String namespaceURI, String qualifiedName,
String localName)
throws DOMException
{
super(ownerDocument, qualifiedName);
this.localName = localName;
this.namespaceURI = namespaceURI;
}
// for DeferredElementImpl
protected ElementNSImpl(CoreDocumentImpl ownerDocument,
String value) {
super(ownerDocument, value);
}
// Support for DOM Level 3 renameNode method.
// Note: This only deals with part of the pb. CoreDocumentImpl
// does all the work.
void rename(String namespaceURI, String qualifiedName)
{
if (needsSyncData()) {
synchronizeData();
}
this.name = qualifiedName;
setName(namespaceURI, qualifiedName);
reconcileDefaultAttributes();
}
/**
* NON-DOM: resets this node and sets specified values for the node
*
* @param ownerDocument
* @param namespaceURI
* @param qualifiedName
* @param localName
*/
protected void setValues (CoreDocumentImpl ownerDocument,
String namespaceURI, String qualifiedName,
String localName){
// remove children first
firstChild = null;
previousSibling = null;
nextSibling = null;
fNodeListCache = null;
// set owner document
attributes = null;
super.flags = 0;
setOwnerDocument(ownerDocument);
// synchronizeData will initialize attributes
needsSyncData(true);
super.name = qualifiedName;
this.localName = localName;
this.namespaceURI = namespaceURI;
}
//
// Node methods
//
//
//DOM2: Namespace methods.
//
/**
* Introduced in DOM Level 2. <p>
*
* The namespace URI of this node, or null if it is unspecified.<p>
*
* This is not a computed value that is the result of a namespace lookup based on
* an examination of the namespace declarations in scope. It is merely the
* namespace URI given at creation time.<p>
*
* For nodes created with a DOM Level 1 method, such as createElement
* from the Document interface, this is null.
* @since WD-DOM-Level-2-19990923
*/
public String getNamespaceURI()
{
if (needsSyncData()) {
synchronizeData();
}
return namespaceURI;
}
/**
* Introduced in DOM Level 2. <p>
*
* The namespace prefix of this node, or null if it is unspecified. <p>
*
* For nodes created with a DOM Level 1 method, such as createElement
* from the Document interface, this is null. <p>
*
* @since WD-DOM-Level-2-19990923
*/
public String getPrefix()
{
if (needsSyncData()) {
synchronizeData();
}
int index = name.indexOf(':');
return index < 0 ? null : name.substring(0, index);
}
/**
* Introduced in DOM Level 2. <p>
*
* Note that setting this attribute changes the nodeName attribute, which holds the
* qualified name, as well as the tagName and name attributes of the Element
* and Attr interfaces, when applicable.<p>
*
* @param prefix The namespace prefix of this node, or null(empty string) if it is unspecified.
*
* @exception INVALID_CHARACTER_ERR
* Raised if the specified
* prefix contains an invalid character.
* @exception DOMException
* @since WD-DOM-Level-2-19990923
*/
public void setPrefix(String prefix)
throws DOMException
{
if (needsSyncData()) {
synchronizeData();
}
if (ownerDocument.errorChecking) {
if (isReadOnly()) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NO_MODIFICATION_ALLOWED_ERR", null);
throw new DOMException(
DOMException.NO_MODIFICATION_ALLOWED_ERR,
msg);
}
if (prefix != null && prefix.length() != 0) {
if (!CoreDocumentImpl.isXMLName(prefix,ownerDocument.isXML11Version())) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null);
throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg);
}
if (namespaceURI == null || prefix.indexOf(':') >=0) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NAMESPACE_ERR", null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
} else if (prefix.equals("xml")) {
if (!namespaceURI.equals(xmlURI)) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NAMESPACE_ERR", null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
}
}
}
}
// update node name with new qualifiedName
if (prefix !=null && prefix.length() != 0) {
name = prefix + ":" + localName;
}
else {
name = localName;
}
}
/**
* Introduced in DOM Level 2. <p>
*
* Returns the local part of the qualified name of this node.
* @since WD-DOM-Level-2-19990923
*/
public String getLocalName()
{
if (needsSyncData()) {
synchronizeData();
}
return localName;
}
/**
* DOM Level 3 WD - Experimental.
* Retrieve baseURI
*/
public String getBaseURI() {
if (needsSyncData()) {
synchronizeData();
}
// Absolute base URI is computed according to XML Base (http://www.w3.org/TR/xmlbase/#granularity)
// 1. the base URI specified by an xml:base attribute on the element, if one exists
if (attributes != null) {
Attr attrNode = (Attr)attributes.getNamedItemNS("http://www.w3.org/XML/1998/namespace", "base");
if (attrNode != null) {
String uri = attrNode.getNodeValue();
if (uri.length() != 0 ) {// attribute value is always empty string
try {
uri = new URI(uri).toString();
}
catch (org.apache.xerces.util.URI.MalformedURIException e) {
// This may be a relative URI.
// Start from the base URI of the parent, or if this node has no parent, the owner node.
NodeImpl parentOrOwner = (parentNode() != null) ? parentNode() : ownerNode;
// Make any parentURI into a URI object to use with the URI(URI, String) constructor.
String parentBaseURI = (parentOrOwner != null) ? parentOrOwner.getBaseURI() : null;
if (parentBaseURI != null) {
try {
uri = new URI(new URI(parentBaseURI), uri).toString();
}
catch (org.apache.xerces.util.URI.MalformedURIException ex){
// This should never happen: parent should have checked the URI and returned null if invalid.
return null;
}
return uri;
}
// REVISIT: what should happen in this case?
return null;
}
return uri;
}
}
}
//2.the base URI of the element's parent element within the document or external entity,
//if one exists
String parentElementBaseURI = (this.parentNode() != null) ? this.parentNode().getBaseURI() : null ;
//base URI of parent element is not null
if(parentElementBaseURI != null){
try {
//return valid absolute base URI
return new URI(parentElementBaseURI).toString();
}
catch (org.apache.xerces.util.URI.MalformedURIException e){
// REVISIT: what should happen in this case?
return null;
}
}
//3. the base URI of the document entity or external entity containing the element
String baseURI = (this.ownerNode != null) ? this.ownerNode.getBaseURI() : null ;
if(baseURI != null){
try {
//return valid absolute base URI
return new URI(baseURI).toString();
}
catch (org.apache.xerces.util.URI.MalformedURIException e){
// REVISIT: what should happen in this case?
return null;
}
}
return null;
}
/**
* @see org.w3c.dom.TypeInfo#getTypeName()
*/
public String getTypeName() {
if (type !=null){
if (type instanceof XSSimpleTypeDefinition) {
return ((XSSimpleTypeDecl) type).getTypeName();
} else {
return ((XSComplexTypeDecl) type).getTypeName();
}
}
return null;
}
/**
* @see org.w3c.dom.TypeInfo#getTypeNamespace()
*/
public String getTypeNamespace() {
if (type !=null){
return type.getNamespace();
}
return null;
}
/**
* Introduced in DOM Level 2. <p>
* Checks if a type is derived from another by restriction. See:
* http://www.w3.org/TR/DOM-Level-3-Core/core.html#TypeInfo-isDerivedFrom
*
* @param typeNamespaceArg
* The namspace of the ancestor type declaration
* @param typeNameArg
* The name of the ancestor type declaration
* @param derivationMethod
* The derivation method
*
* @return boolean True if the type is derived by restriciton for the
* reference type
*/
public boolean isDerivedFrom(String typeNamespaceArg, String typeNameArg,
int derivationMethod) {
if(needsSyncData()) {
synchronizeData();
}
if (type != null) {
if (type instanceof XSSimpleTypeDefinition) {
return ((XSSimpleTypeDecl) type).isDOMDerivedFrom(
typeNamespaceArg, typeNameArg, derivationMethod);
} else {
return ((XSComplexTypeDecl) type).isDOMDerivedFrom(
typeNamespaceArg, typeNameArg, derivationMethod);
}
}
return false;
}
/**
* NON-DOM: setting type used by the DOM parser
* @see NodeImpl#setReadOnly
*/
public void setType(XSTypeDefinition type) {
this.type = type;
}
}
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