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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program.
The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual.
Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page.
Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1.
Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.
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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 ui;
import java.io.Serializable;
import java.util.Hashtable;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Displays a DOM document in a tree control.
*
* @author Andy Clark, IBM
* @version $Id$
*/
public class DOMTree
extends JTree
{
private static final long serialVersionUID = 3977582510937224497L;
//
// Constructors
//
/** Default constructor. */
public DOMTree() {
this(null);
}
/** Constructs a tree with the specified document. */
public DOMTree(Document document) {
super(new Model());
// set tree properties
setRootVisible(false);
// set properties
setDocument(document);
} // ()
//
// Public methods
//
/** Sets the document. */
public void setDocument(Document document) {
((Model)getModel()).setDocument(document);
expandRow(0);
}
/** Returns the document. */
public Document getDocument() {
return ((Model)getModel()).getDocument();
}
/** get the org.w3c.Node for a MutableTreeNode. */
public Node getNode(Object treeNode) {
return ((Model)getModel()).getNode(treeNode);
}
//
// Classes
//
/**
* DOM tree model.
*
* @author Andy Clark, IBM
* @version
*/
static class Model
extends DefaultTreeModel
implements Serializable
{
private static final long serialVersionUID = 3257286915924571186L;
//
// Data
//
/** Document. */
private Document document;
/** Node Map. */
private Hashtable nodeMap = new Hashtable();
//
// Constructors
//
/** Default constructor. */
public Model() {
this(null);
}
/** Constructs a model from the specified document. */
public Model(Document document) {
super(new DefaultMutableTreeNode());
setDocument(document);
}
//
// Public methods
//
/** Sets the document. */
public synchronized void setDocument(Document document) {
// save document
this.document = document;
// clear tree and re-populate
((DefaultMutableTreeNode)getRoot()).removeAllChildren();
nodeMap.clear();
buildTree();
fireTreeStructureChanged(this, new Object[] { getRoot() }, new int[0], new Object[0]);
} // setDocument(Document)
/** Returns the document. */
public Document getDocument() {
return document;
}
/** get the org.w3c.Node for a MutableTreeNode. */
public Node getNode(Object treeNode) {
return (Node)nodeMap.get(treeNode);
}
//
// Private methods
//
/** Builds the tree. */
private void buildTree() {
// is there anything to do?
if (document == null) { return; }
// iterate over children of this node
NodeList nodes = document.getChildNodes();
int len = (nodes != null) ? nodes.getLength() : 0;
MutableTreeNode root = (MutableTreeNode)getRoot();
for (int i = 0; i < len; i++) {
Node node = nodes.item(i);
switch (node.getNodeType()) {
case Node.DOCUMENT_NODE: {
root = insertDocumentNode(node, root);
break;
}
case Node.ELEMENT_NODE: {
insertElementNode(node, root);
break;
}
default: // ignore
} // switch
} // for
} // buildTree()
/** Inserts a node and returns a reference to the new node. */
private MutableTreeNode insertNode(String what, MutableTreeNode where) {
MutableTreeNode node = new DefaultMutableTreeNode(what);
insertNodeInto(node, where, where.getChildCount());
return node;
} // insertNode(Node,MutableTreeNode):MutableTreeNode
/** Inserts the document node. */
private MutableTreeNode insertDocumentNode(Node what, MutableTreeNode where) {
MutableTreeNode treeNode = insertNode("<"+what.getNodeName()+'>', where);
nodeMap.put(treeNode, what);
return treeNode;
}
/** Inserts an element node. */
private MutableTreeNode insertElementNode(Node what, MutableTreeNode where) {
// build up name
StringBuffer name = new StringBuffer();
name.append('<');
name.append(what.getNodeName());
NamedNodeMap attrs = what.getAttributes();
int attrCount = (attrs != null) ? attrs.getLength() : 0;
for (int i = 0; i < attrCount; i++) {
Node attr = attrs.item(i);
name.append(' ');
name.append(attr.getNodeName());
name.append("=\"");
name.append(attr.getNodeValue());
name.append('"');
}
name.append('>');
// insert element node
MutableTreeNode element = insertNode(name.toString(), where);
nodeMap.put(element, what);
// gather up attributes and children nodes
NodeList children = what.getChildNodes();
int len = (children != null) ? children.getLength() : 0;
for (int i = 0; i < len; i++) {
Node node = children.item(i);
switch (node.getNodeType()) {
case Node.CDATA_SECTION_NODE: {
insertCDataSectionNode( node, element ); //Add a Section Node
break;
}
case Node.TEXT_NODE: {
insertTextNode(node, element);
break;
}
case Node.ELEMENT_NODE: {
insertElementNode(node, element);
break;
}
}
}
return element;
} // insertElementNode(Node,MutableTreeNode):MutableTreeNode
/** Inserts a text node. */
private MutableTreeNode insertTextNode(Node what, MutableTreeNode where) {
String value = what.getNodeValue().trim();
if (value.length() > 0) {
MutableTreeNode treeNode = insertNode(value, where);
nodeMap.put(treeNode, what);
return treeNode;
}
return null;
}
/** Inserts a CData Section Node. */
private MutableTreeNode insertCDataSectionNode(Node what, MutableTreeNode where) {
StringBuffer CSectionBfr = new StringBuffer();
//--- optional --- CSectionBfr.append( "" );
if (CSectionBfr.length() > 0) {
MutableTreeNode treeNode = insertNode(CSectionBfr.toString(), where);
nodeMap.put(treeNode, what);
return treeNode;
}
return null;
}
} // class Model
} // class DOMTree
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