/* Licensed 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.camunda.bpm.model.xml.impl.instance;
import org.camunda.bpm.model.xml.ModelException;
import org.camunda.bpm.model.xml.impl.util.DomUtil;
import org.camunda.bpm.model.xml.impl.util.XmlQName;
import org.camunda.bpm.model.xml.instance.DomDocument;
import org.camunda.bpm.model.xml.instance.DomElement;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import javax.xml.transform.dom.DOMSource;
import java.util.List;
import static javax.xml.XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
/**
* @author Sebastian Menski
*/
public class DomDocumentImpl implements DomDocument {
public static final String GENERIC_NS_PREFIX = "ns";
private final Document document;
public DomDocumentImpl(Document document) {
this.document = document;
}
public DomElement getRootElement() {
Element documentElement = document.getDocumentElement();
if (documentElement != null) {
return new DomElementImpl(documentElement);
}
else {
return null;
}
}
public void setRootElement(DomElement rootElement) {
Element documentElement = document.getDocumentElement();
Element newDocumentElement = ((DomElementImpl) rootElement).getElement();
if (documentElement != null) {
document.replaceChild(documentElement, newDocumentElement);
}
else {
document.appendChild(newDocumentElement);
}
}
public DomElement createElement(String namespaceUri, String localName) {
XmlQName xmlQName = new XmlQName(this, namespaceUri, localName);
Element element = document.createElementNS(xmlQName.getNamespaceUri(), xmlQName.getPrefixedName());
return new DomElementImpl(element);
}
public DomElement getElementById(String id) {
Element element = document.getElementById(id);
if (element != null) {
return new DomElementImpl(element);
}
else {
return null;
}
}
public List<DomElement> getElementsByNameNs(String namespaceUri, String localName) {
NodeList elementsByTagNameNS = document.getElementsByTagNameNS(namespaceUri, localName);
return DomUtil.filterNodeListByName(elementsByTagNameNS, namespaceUri, localName);
}
public DOMSource getDomSource() {
return new DOMSource(document);
}
public String registerNamespace(String namespaceUri) {
DomElement rootElement = getRootElement();
if (rootElement != null) {
return rootElement.registerNamespace(namespaceUri);
}
else {
throw new ModelException("Unable to define a new namespace without a root document element");
}
}
public void registerNamespace(String prefix, String namespaceUri) {
DomElement rootElement = getRootElement();
if (rootElement != null) {
rootElement.registerNamespace(prefix, namespaceUri);
}
else {
throw new ModelException("Unable to define a new namespace without a root document element");
}
}
protected String getUnusedGenericNsPrefix() {
Element documentElement = document.getDocumentElement();
if (documentElement == null) {
return GENERIC_NS_PREFIX + "0";
}
else {
for (int i = 0; i < Integer.MAX_VALUE; i++) {
if (!documentElement.hasAttributeNS(XMLNS_ATTRIBUTE_NS_URI, GENERIC_NS_PREFIX + i)) {
return GENERIC_NS_PREFIX + i;
}
}
throw new ModelException("Unable to find an unused namespace prefix");
}
}
public DomDocument clone() {
return new DomDocumentImpl((Document) document.cloneNode(true));
}
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DomDocumentImpl that = (DomDocumentImpl) o;
return document.equals(that.document);
}
public int hashCode() {
return document.hashCode();
}
}