/**
* Description of the Method
*
* @param th Description of the Parameter
* @param lex Description of the Parameter
* @return Description of the Return Value
* @exception Exception Description of the Exception
*/
@Override
public synchronized E parseXML(XMLTagHandler th, XMLLex lex) throws Exception {
TagPeer tagPeer;
TagPeer currentTagPeer = null;
Tag tag;
E object = null;
XMLStack stack = new XMLStack();
// show the contents of the tag handler
while ((tag = lex.getNextTag()) != null) {
if (DEBUG) {
System.out.println(this + " XMLCParser: Tag=" + tag);
}
/*
* Process this tag, also process text in between tags
*/
switch (tag.type) {
case STAG:
tagPeer = th.findTagPeer(tag.name);
if (DEBUG) {
System.out.println("Tag Peer: " + tagPeer);
}
if (tagPeer != null) {
currentTagPeer = tagPeer;
tagPeer.assignSlots(stack, tag);
if (tag.hasImplicitEndTag) {
object = (E) tagPeer.validateEntity(stack);
// need to reset otherwise possible PCDATA is assigned wrong
currentTagPeer = null;
}
}
break;
case ETAG:
tagPeer = th.findTagPeer(tag.name);
if (DEBUG) {
System.out.println("Tag Peer/End tag: " + tagPeer);
}
if (tagPeer != null) {
object = (E) tagPeer.validateEntity(stack);
}
currentTagPeer = null;
break;
default:
if (currentTagPeer != null && currentTagPeer instanceof StringPeer) {
StringPeer stringPeer = (StringPeer) currentTagPeer;
if (DEBUG) {
System.out.println("Applying string to " + stringPeer);
}
stringPeer.applyString(stack, tag);
currentTagPeer = null;
}
break;
}
}
return object;
}
/**
* Handle the end of an element.
*
* <p>The default implementation does nothing.
*
* @param elementName Description of the Parameter
* @exception Exception Derived methods may throw exceptions.
* @see dtdc_rt.parser.XMLHandler#endElement
*/
@Override
public void endElement(String elementName) throws Exception {
tag.clearAttributes();
tag.type = Tag.ETAG;
tagPeer = th.findTagPeer(elementName);
if (tagPeer != null) {
object = (E) tagPeer.validateEntity(stack);
}
currentTagPeer = null;
}
/**
* Handle the start of an element.
*
* <p>The default implementation does nothing.
*
* @param elementName Description of the Parameter
* @exception Exception Derived methods may throw exceptions.
* @see dtdc_rt.parser.XMLHandler#startElement
*/
@Override
public void startElement(String elementName) throws Exception {
tag.name = elementName;
tag.type = Tag.STAG;
if (null == th) {
throw new IllegalStateException("Tag Handler is null!");
}
tagPeer = th.findTagPeer(tag.name);
if (tagPeer != null) {
currentTagPeer = tagPeer;
tagPeer.assignSlots(stack, tag);
}
}
/**
* Description of the Method
*
* @param node Description of the Parameter
* @param args Description of the Parameter
* @return Description of the Return Value
* @exception Exception Description of the Exception
*/
private Object[] walkTree(Node node, Object[] args) throws Exception {
XMLStack stack = (XMLStack) args[1];
XMLTagHandler th = (XMLTagHandler) args[2];
TagPeer currentTagPeer = (TagPeer) args[3];
TagPeer tagPeer;
Tag tag;
Object object = null;
int type = node.getNodeType();
switch (type) {
case Node.ELEMENT_NODE:
/*
* Create a tag for this element
*/
tag = new Tag(Tag.STAG, node.getNodeName());
Attr attrs[] = sortAttributes(node.getAttributes());
for (int i = 0; i < attrs.length; i++) {
Attr attr = attrs[i];
tag.addAttribute(attr.getNodeName(), attr.getNodeValue());
}
tagPeer = th.findTagPeer(tag.name);
if (DEBUG) {
System.out.println("Tag Peer: " + tagPeer);
}
if (tagPeer != null) {
currentTagPeer = tagPeer;
tagPeer.assignSlots(stack, tag);
if (tag.hasImplicitEndTag) {
object = tagPeer.validateEntity(stack);
}
}
// recurse through all the children
NodeList children = node.getChildNodes();
if (children != null) {
int len = children.getLength();
for (int i = 0; i < len; i++) {
args[3] = currentTagPeer;
args = walkTree(children.item(i), args);
}
}
break;
case Node.CDATA_SECTION_NODE:
case Node.TEXT_NODE:
tag = new Tag(Tag.STRING, node.getNodeValue());
if (currentTagPeer != null && currentTagPeer instanceof StringPeer) {
StringPeer stringPeer = (StringPeer) currentTagPeer;
if (DEBUG) {
System.out.println("Applying string to " + stringPeer);
}
stringPeer.applyString(stack, tag);
currentTagPeer = null;
}
break;
}
if (type == Node.ELEMENT_NODE) {
tag = new Tag(Tag.ETAG, node.getNodeName());
tagPeer = th.findTagPeer(tag.name);
if (DEBUG) {
System.out.println("Tag Peer/End tag: " + tagPeer);
}
if (tagPeer != null) {
object = tagPeer.validateEntity(stack);
}
currentTagPeer = null;
}
args[0] = object;
args[3] = currentTagPeer;
return args;
}