/**
* 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 nokogiri.internals.c14n;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
/**
* This is the base class to all Objects which have a direct 1:1 mapping to an
* Element in a particular namespace.
*/
public abstract class ElementProxy {
/** Field constructionElement */
protected Element constructionElement = null;
/** Field baseURI */
protected String baseURI = null;
/** Field doc */
protected Document doc = null;
/** Field prefixMappings */
private static Map<String, String> prefixMappings = new ConcurrentHashMap<String, String>();
/**
* Constructor ElementProxy
*
*/
public ElementProxy() {
}
/**
* Constructor ElementProxy
*
* @param doc
*/
public ElementProxy(Document doc) {
if (doc == null) {
throw new RuntimeException("Document is null");
}
this.doc = doc;
this.constructionElement =
createElementForFamilyLocal(this.doc, this.getBaseNamespace(), this.getBaseLocalName());
}
/**
* Constructor ElementProxy
*
* @param element
* @param BaseURI
* @throws XMLSecurityException
*/
public ElementProxy(Element element, String BaseURI) throws CanonicalizationException {
if (element == null) {
throw new CanonicalizationException("ElementProxy.nullElement");
}
if (System.getProperty("nokogiri.c14.debug") == "on") {
System.out.println("setElement(\"" + element.getTagName() + "\", \"" + BaseURI + "\")");
}
this.doc = element.getOwnerDocument();
this.constructionElement = element;
this.baseURI = BaseURI;
this.guaranteeThatElementInCorrectSpace();
}
/**
* Returns the namespace of the Elements of the sub-class.
*
* @return the namespace of the Elements of the sub-class.
*/
public abstract String getBaseNamespace();
/**
* Returns the localname of the Elements of the sub-class.
*
* @return the localname of the Elements of the sub-class.
*/
public abstract String getBaseLocalName();
protected Element createElementForFamilyLocal(
Document doc, String namespace, String localName
) {
Element result = null;
if (namespace == null) {
result = doc.createElementNS(null, localName);
} else {
String baseName = this.getBaseNamespace();
String prefix = ElementProxy.getDefaultPrefix(baseName);
if ((prefix == null) || (prefix.length() == 0)) {
result = doc.createElementNS(namespace, localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns", namespace);
} else {
result = doc.createElementNS(namespace, prefix + ":" + localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns:" + prefix, namespace);
}
}
return result;
}
/**
* This method creates an Element in a given namespace with a given localname.
* It uses the {@link ElementProxy#getDefaultPrefix} method to decide whether
* a particular prefix is bound to that namespace.
* <BR />
* This method was refactored out of the constructor.
*
* @param doc
* @param namespace
* @param localName
* @return The element created.
*/
public static Element createElementForFamily(Document doc, String namespace, String localName) {
Element result = null;
String prefix = ElementProxy.getDefaultPrefix(namespace);
if (namespace == null) {
result = doc.createElementNS(null, localName);
} else {
if ((prefix == null) || (prefix.length() == 0)) {
result = doc.createElementNS(namespace, localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns", namespace);
} else {
result = doc.createElementNS(namespace, prefix + ":" + localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns:" + prefix, namespace);
}
}
return result;
}
/**
* Returns the Element which was constructed by the Object.
*
* @return the Element which was constructed by the Object.
*/
public final Element getElement() {
return this.constructionElement;
}
/**
* Returns the Element plus a leading and a trailing CarriageReturn Text node.
*
* @return the Element which was constructed by the Object.
*/
public final NodeList getElementPlusReturns() {
HelperNodeList nl = new HelperNodeList();
nl.appendChild(this.doc.createTextNode("\n"));
nl.appendChild(this.getElement());
nl.appendChild(this.doc.createTextNode("\n"));
return nl;
}
/**
* Method getDocument
*
* @return the Document where this element is contained.
*/
public Document getDocument() {
return this.doc;
}
/**
* Method getBaseURI
*
* @return the base uri of the namespace of this element
*/
public String getBaseURI() {
return this.baseURI;
}
/**
* Method guaranteeThatElementInCorrectSpace
*
* @throws XMLSecurityException
*/
void guaranteeThatElementInCorrectSpace() throws CanonicalizationException {
String expectedLocalName = this.getBaseLocalName();
String expectedNamespaceUri = this.getBaseNamespace();
String actualLocalName = this.constructionElement.getLocalName();
String actualNamespaceUri = this.constructionElement.getNamespaceURI();
if(!expectedNamespaceUri.equals(actualNamespaceUri)
&& !expectedLocalName.equals(actualLocalName)) {
Object exArgs[] = { actualNamespaceUri + ":" + actualLocalName,
expectedNamespaceUri + ":" + expectedLocalName};
throw new CanonicalizationException("xml.WrongElement", exArgs);
}
}
/**
* Method addText
*
* @param text
*/
public void addText(String text) {
if (text != null) {
Text t = this.doc.createTextNode(text);
this.constructionElement.appendChild(t);
}
}
/**
* Method getTextFromChildElement
*
* @param localname
* @param namespace
* @return the Text of the textNode
*/
public String getTextFromChildElement(String localname, String namespace) {
return XMLUtils.selectNode(
this.constructionElement.getFirstChild(),
namespace,
localname,
0).getTextContent();
}
/**
* Method getTextFromTextChild
*
* @return the Text obtained by concatenating all the text nodes of this
* element
*/
public String getTextFromTextChild() {
return XMLUtils.getFullTextChildrenFromElement(this.constructionElement);
}
/**
* Method length
*
* @param namespace
* @param localname
* @return the number of elements {namespace}:localname under this element
*/
public int length(String namespace, String localname) {
int number = 0;
Node sibling = this.constructionElement.getFirstChild();
while (sibling != null) {
if (localname.equals(sibling.getLocalName())
&& namespace.equals(sibling.getNamespaceURI())) {
number++;
}
sibling = sibling.getNextSibling();
}
return number;
}
/**
* Method getDefaultPrefix
*
* @param namespace
* @return the default prefix bind to this element.
*/
public static String getDefaultPrefix(String namespace) {
return prefixMappings.get(namespace);
}
}