freemarker.ext.xml._DomNavigator Maven / Gradle / Ivy
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Google App Engine compliant variation of FreeMarker.
FreeMarker is a "template engine"; a generic tool to generate text output based on templates.
/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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 freemarker.ext.xml;
import java.io.StringWriter;
import java.util.List;
import org.jaxen.Context;
import org.jaxen.NamespaceContext;
import org.jaxen.dom.DOMXPath;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import freemarker.template.TemplateModelException;
import freemarker.template.utility.StringUtil;
/**
* Don't use this class; it's only public to work around Google App Engine Java
* compliance issues. FreeMarker developers only: treat this class as package-visible.
*/
public class _DomNavigator extends Navigator {
public _DomNavigator() {
}
void getAsString(Object node, StringWriter sw) {
outputContent((Node)node, sw.getBuffer());
}
private void outputContent(Node n, StringBuffer buf) {
switch(n.getNodeType()) {
case Node.ATTRIBUTE_NODE: {
buf.append(' ')
.append(getQualifiedName(n))
.append("=\"")
.append(StringUtil.XMLEncNA(n.getNodeValue())) // XmlEncNA for HTML compatibility
.append('"');
break;
}
case Node.CDATA_SECTION_NODE: {
buf.append("");
break;
}
case Node.COMMENT_NODE: {
buf.append("");
break;
}
case Node.DOCUMENT_NODE: {
outputContent(n.getChildNodes(), buf);
break;
}
case Node.DOCUMENT_TYPE_NODE: {
buf.append("');
break;
}
case Node.ELEMENT_NODE: {
buf.append('<').append(getQualifiedName(n));
outputContent(n.getAttributes(), buf);
buf.append('>');
outputContent(n.getChildNodes(), buf);
buf.append("');
break;
}
case Node.ENTITY_NODE: {
outputContent(n.getChildNodes(), buf);
break;
}
case Node.ENTITY_REFERENCE_NODE: {
buf.append('&').append(n.getNodeName()).append(';');
break;
}
case Node.PROCESSING_INSTRUCTION_NODE: {
buf.append("");
break;
}
case Node.TEXT_NODE: {
buf.append(StringUtil.XMLEncNQG(n.getNodeValue()));
break;
}
}
}
private void outputContent(NodeList nodes, StringBuffer buf) {
for(int i = 0; i < nodes.getLength(); ++i) {
outputContent(nodes.item(i), buf);
}
}
private void outputContent(NamedNodeMap nodes, StringBuffer buf) {
for(int i = 0; i < nodes.getLength(); ++i) {
outputContent(nodes.item(i), buf);
}
}
void getChildren(Object node, String localName, String namespaceUri, List result) {
if("".equals(namespaceUri)) {
namespaceUri = null;
}
NodeList children = ((Node)node).getChildNodes();
for(int i = 0; i < children.getLength(); ++i) {
Node subnode = children.item(i);
// IMO, we should get the text nodes as well -- will discuss.
if(subnode.getNodeType() == Node.ELEMENT_NODE || subnode.getNodeType() == Node.TEXT_NODE) {
if(localName == null || (equal(subnode.getNodeName(), localName) && equal(subnode.getNamespaceURI(), namespaceUri))) {
result.add(subnode);
}
}
}
}
void getAttributes(Object node, String localName, String namespaceUri, List result) {
if(node instanceof Element) {
Element e = (Element)node;
if(localName == null) {
NamedNodeMap atts = e.getAttributes();
for(int i = 0; i < atts.getLength(); ++i) {
result.add(atts.item(i));
}
}
else {
if("".equals(namespaceUri)) {
namespaceUri = null;
}
Attr attr = e.getAttributeNodeNS(namespaceUri, localName);
if(attr != null) {
result.add(attr);
}
}
}
else if (node instanceof ProcessingInstruction) {
ProcessingInstruction pi = (ProcessingInstruction)node;
if ("target".equals(localName)) {
result.add(createAttribute(pi, "target", pi.getTarget()));
}
else if ("data".equals(localName)) {
result.add(createAttribute(pi, "data", pi.getData()));
}
else {
// TODO: DOM has no facility for parsing data into
// name-value pairs...
;
}
} else if (node instanceof DocumentType) {
DocumentType doctype = (DocumentType)node;
if ("publicId".equals(localName)) {
result.add(createAttribute(doctype, "publicId", doctype.getPublicId()));
}
else if ("systemId".equals(localName)) {
result.add(createAttribute(doctype, "systemId", doctype.getSystemId()));
}
else if ("elementName".equals(localName)) {
result.add(createAttribute(doctype, "elementName", doctype.getNodeName()));
}
}
}
private Attr createAttribute(Node node, String name, String value) {
Attr attr = node.getOwnerDocument().createAttribute(name);
attr.setNodeValue(value);
return attr;
}
void getDescendants(Object node, List result) {
NodeList children = ((Node)node).getChildNodes();
for(int i = 0; i < children.getLength(); ++i) {
Node subnode = children.item(i);
if(subnode.getNodeType() == Node.ELEMENT_NODE) {
result.add(subnode);
getDescendants(subnode, result);
}
}
}
Object getParent(Object node) {
return ((Node)node).getParentNode();
}
Object getDocument(Object node) {
return ((Node)node).getOwnerDocument();
}
Object getDocumentType(Object node) {
return
node instanceof Document
? ((Document)node).getDoctype()
: null;
}
void getContent(Object node, List result) {
NodeList children = ((Node)node).getChildNodes();
for(int i = 0; i < children.getLength(); ++i) {
result.add(children.item(i));
}
}
String getText(Object node) {
StringBuffer buf = new StringBuffer();
if(node instanceof Element) {
NodeList children = ((Node)node).getChildNodes();
for(int i = 0; i < children.getLength(); ++i) {
Node child = children.item(i);
if(child instanceof Text) {
buf.append(child.getNodeValue());
}
}
return buf.toString();
}
else {
return ((Node)node).getNodeValue();
}
}
String getLocalName(Object node) {
return ((Node)node).getNodeName();
}
String getNamespacePrefix(Object node) {
return ((Node)node).getPrefix();
}
String getNamespaceUri(Object node) {
return ((Node)node).getNamespaceURI();
}
String getType(Object node) {
switch(((Node)node).getNodeType()) {
case Node.ATTRIBUTE_NODE: {
return "attribute";
}
case Node.CDATA_SECTION_NODE: {
return "cdata";
}
case Node.COMMENT_NODE: {
return "comment";
}
case Node.DOCUMENT_NODE: {
return "document";
}
case Node.DOCUMENT_TYPE_NODE: {
return "documentType";
}
case Node.ELEMENT_NODE: {
return "element";
}
case Node.ENTITY_NODE: {
return "entity";
}
case Node.ENTITY_REFERENCE_NODE: {
return "entityReference";
}
case Node.PROCESSING_INSTRUCTION_NODE: {
return "processingInstruction";
}
case Node.TEXT_NODE: {
return "text";
}
}
return "unknown";
}
XPathEx createXPathEx(String xpathString) throws TemplateModelException
{
try {
return new DomXPathEx(xpathString);
}
catch(Exception e) {
throw new TemplateModelException(e);
}
}
private static final class DomXPathEx
extends
DOMXPath
implements
XPathEx
{
DomXPathEx(String path)
throws
Exception
{
super(path);
}
public List selectNodes(Object object, NamespaceContext namespaces)
throws
TemplateModelException
{
Context context = getContext(object);
context.getContextSupport().setNamespaceContext(namespaces);
try {
return selectNodesForContext(context);
}
catch(Exception e) {
throw new TemplateModelException(e);
}
}
}
}
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