package org.springframework.util.xml;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
class DomContentHandler implements ContentHandler {
private final Document document;
private final List<Element> elements = new ArrayList<>();
private final Node node;
DomContentHandler(Node node) {
this.node = node;
if (node instanceof Document) {
this.document = (Document) node;
}
else {
this.document = node.getOwnerDocument();
}
}
private Node getParent() {
if (!this.elements.isEmpty()) {
return this.elements.get(this.elements.size() - 1);
}
else {
return this.node;
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) {
Node parent = getParent();
Element element = this.document.createElementNS(uri, qName);
for (int i = 0; i < attributes.getLength(); i++) {
String attrUri = attributes.getURI(i);
String attrQname = attributes.getQName(i);
String value = attributes.getValue(i);
if (!attrQname.startsWith("xmlns")) {
element.setAttributeNS(attrUri, attrQname, value);
}
}
element = (Element) parent.appendChild(element);
this.elements.add(element);
}
@Override
public void endElement(String uri, String localName, String qName) {
this.elements.remove(this.elements.size() - 1);
}
@Override
public void characters(char[] ch, int start, int length) {
String data = new String(ch, start, length);
Node parent = getParent();
Node lastChild = parent.getLastChild();
if (lastChild != null && lastChild.getNodeType() == Node.TEXT_NODE) {
((Text) lastChild).appendData(data);
}
else {
Text text = this.document.createTextNode(data);
parent.appendChild(text);
}
}
@Override
public void processingInstruction(String target, String data) {
Node parent = getParent();
ProcessingInstruction pi = this.document.createProcessingInstruction(target, data);
parent.appendChild(pi);
}
@Override
public void setDocumentLocator(Locator locator) {
}
@Override
public void startDocument() {
}
@Override
public void endDocument() {
}
@Override
public void startPrefixMapping(String prefix, String uri) {
}
@Override
public void endPrefixMapping(String prefix) {
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length) {
}
@Override
public void skippedEntity(String name) {
}
}