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.
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/*
* 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 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() {
}
@Override
void getAsString(Object node, StringWriter sw) {
outputContent((Node) node, sw);
}
private void outputContent(Node n, StringWriter 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, StringWriter buf) {
for (int i = 0; i < nodes.getLength(); ++i) {
outputContent(nodes.item(i), buf);
}
}
private void outputContent(NamedNodeMap nodes, StringWriter buf) {
for (int i = 0; i < nodes.getLength(); ++i) {
outputContent(nodes.item(i), buf);
}
}
@Override
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);
}
}
}
}
@Override
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;
}
@Override
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);
}
}
}
@Override
Object getParent(Object node) {
return ((Node) node).getParentNode();
}
@Override
Object getDocument(Object node) {
return ((Node) node).getOwnerDocument();
}
@Override
Object getDocumentType(Object node) {
return
node instanceof Document
? ((Document) node).getDoctype()
: null;
}
@Override
void getContent(Object node, List result) {
NodeList children = ((Node) node).getChildNodes();
for (int i = 0; i < children.getLength(); ++i) {
result.add(children.item(i));
}
}
@Override
String getText(Object node) {
StringBuilder buf = new StringBuilder();
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();
}
}
@Override
String getLocalName(Object node) {
return ((Node) node).getNodeName();
}
@Override
String getNamespacePrefix(Object node) {
return ((Node) node).getPrefix();
}
@Override
String getNamespaceUri(Object node) {
return ((Node) node).getNamespaceURI();
}
@Override
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";
}
@Override
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);
}
@Override
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);
}
}
}
}