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XML Tree Dumper 2
//Example XML document
/*
An XML Document Containing a Simple Contact List
Start example
<?xml version="1.0" standalone="yes"?>
<folks>
<person>
<phone>306 555-9999</phone>
<email>joe@webserver.net</email>
<name>Wang, Joe</name>
</person>
<person>
<phone>704 555-0000</phone>
<name>Pet, Rob</name>
<email>rob@server.com</email>
</person>
</folks>
*/
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Attr;
import org.w3c.dom.CDATASection;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentFragment;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.Entity;
import org.w3c.dom.EntityReference;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Notation;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class TreeDumper2 {
public void dump(Document doc) {
dumpLoop((Node) doc, "");
}
private void dumpLoop(Node node, String indent) {
switch (node.getNodeType()) {
case Node.ATTRIBUTE_NODE:
dumpAttributeNode((Attr) node, indent);
break;
case Node.CDATA_SECTION_NODE:
dumpCDATASectionNode((CDATASection) node, indent);
break;
case Node.COMMENT_NODE:
dumpCommentNode((Comment) node, indent);
break;
case Node.DOCUMENT_NODE:
dumpDocument((Document) node, indent);
break;
case Node.DOCUMENT_FRAGMENT_NODE:
dumpDocumentFragment((DocumentFragment) node, indent);
break;
case Node.DOCUMENT_TYPE_NODE:
dumpDocumentType((DocumentType) node, indent);
break;
case Node.ELEMENT_NODE:
dumpElement((Element) node, indent);
break;
case Node.ENTITY_NODE:
dumpEntityNode((Entity) node, indent);
break;
case Node.ENTITY_REFERENCE_NODE:
dumpEntityReferenceNode((EntityReference) node, indent);
break;
case Node.NOTATION_NODE:
dumpNotationNode((Notation) node, indent);
break;
case Node.PROCESSING_INSTRUCTION_NODE:
dumpProcessingInstructionNode((ProcessingInstruction) node, indent);
break;
case Node.TEXT_NODE:
dumpTextNode((Text) node, indent);
break;
default:
System.out.println(indent + "Unknown node");
break;
}
NodeList list = node.getChildNodes();
for (int i = 0; i < list.getLength(); i++)
dumpLoop(list.item(i), indent + " ");
}
/* Display the contents of a ATTRIBUTE_NODE */
private void dumpAttributeNode(Attr node, String indent) {
System.out.println(indent + "ATTRIBUTE " + node.getName() + "=""
+ node.getValue() + """);
}
/* Display the contents of a CDATA_SECTION_NODE */
private void dumpCDATASectionNode(CDATASection node, String indent) {
System.out.println(indent + "CDATA SECTION length=" + node.getLength());
System.out.println(indent + """ + node.getData() + """);
}
/* Display the contents of a COMMENT_NODE */
private void dumpCommentNode(Comment node, String indent) {
System.out.println(indent + "COMMENT length=" + node.getLength());
System.out.println(indent + " " + node.getData());
}
/* Display the contents of a DOCUMENT_NODE */
private void dumpDocument(Document node, String indent) {
System.out.println(indent + "DOCUMENT");
}
/* Display the contents of a DOCUMENT_FRAGMENT_NODE */
private void dumpDocumentFragment(DocumentFragment node, String indent) {
System.out.println(indent + "DOCUMENT FRAGMENT");
}
/* Display the contents of a DOCUMENT_TYPE_NODE */
private void dumpDocumentType(DocumentType node, String indent) {
System.out.println(indent + "DOCUMENT_TYPE: " + node.getName());
if (node.getPublicId() != null)
System.out.println(indent + " Public ID: " + node.getPublicId());
if (node.getSystemId() != null)
System.out.println(indent + " System ID: " + node.getSystemId());
NamedNodeMap entities = node.getEntities();
if (entities.getLength() > 0) {
for (int i = 0; i < entities.getLength(); i++) {
dumpLoop(entities.item(i), indent + " ");
}
}
NamedNodeMap notations = node.getNotations();
if (notations.getLength() > 0) {
for (int i = 0; i < notations.getLength(); i++)
dumpLoop(notations.item(i), indent + " ");
}
}
/* Display the contents of a ELEMENT_NODE */
private void dumpElement(Element node, String indent) {
System.out.println(indent + "ELEMENT: " + node.getTagName());
NamedNodeMap nm = node.getAttributes();
for (int i = 0; i < nm.getLength(); i++)
dumpLoop(nm.item(i), indent + " ");
}
/* Display the contents of a ENTITY_NODE */
private void dumpEntityNode(Entity node, String indent) {
System.out.println(indent + "ENTITY: " + node.getNodeName());
}
/* Display the contents of a ENTITY_REFERENCE_NODE */
private void dumpEntityReferenceNode(EntityReference node, String indent) {
System.out.println(indent + "ENTITY REFERENCE: " + node.getNodeName());
}
/* Display the contents of a NOTATION_NODE */
private void dumpNotationNode(Notation node, String indent) {
System.out.println(indent + "NOTATION");
System.out.print(indent + " " + node.getNodeName() + "=");
if (node.getPublicId() != null)
System.out.println(node.getPublicId());
else
System.out.println(node.getSystemId());
}
/* Display the contents of a PROCESSING_INSTRUCTION_NODE */
private void dumpProcessingInstructionNode(ProcessingInstruction node,
String indent) {
System.out.println(indent + "PI: target=" + node.getTarget());
System.out.println(indent + " " + node.getData());
}
/* Display the contents of a TEXT_NODE */
private void dumpTextNode(Text node, String indent) {
System.out.println(indent + "TEXT length=" + node.getLength());
System.out.println(indent + " " + node.getData());
}
static public void main(String[] arg) {
String filename = null;
boolean validate = false;
if (arg.length == 1) {
filename = arg[0];
} else if (arg.length == 2) {
if (!arg[0].equals("-v"))
usage();
validate = true;
filename = arg[1];
} else {
usage();
}
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(validate);
dbf.setNamespaceAware(true);
dbf.setIgnoringElementContentWhitespace(true);
// Parse the input to produce a parse tree with its root
// in the form of a Document object
Document doc = null;
try {
DocumentBuilder builder = dbf.newDocumentBuilder();
builder.setErrorHandler(new MyErrorHandler());
InputSource is = new InputSource(filename);
doc = builder.parse(is);
} catch (SAXException e) {
System.exit(1);
} catch (ParserConfigurationException e) {
System.err.println(e);
System.exit(1);
} catch (IOException e) {
System.err.println(e);
System.exit(1);
}
// Use a TreeDumper to list the tree
TreeDumper2 td = new TreeDumper2();
td.dump(doc);
}
private static void usage() {
System.err.println("Usage: DOMCheck [-v] <filename>");
System.exit(1);
}
}
class MyErrorHandler implements ErrorHandler {
public void warning(SAXParseException e) throws SAXException {
show("Warning", e);
throw (e);
}
public void error(SAXParseException e) throws SAXException {
show("Error", e);
throw (e);
}
public void fatalError(SAXParseException e) throws SAXException {
show("Fatal Error", e);
throw (e);
}
private void show(String type, SAXParseException e) {
System.out.println(type + ": " + e.getMessage());
System.out.println("Line " + e.getLineNumber() + " Column "
+ e.getColumnNumber());
System.out.println("System ID: " + e.getSystemId());
}
}
