private static void dumpNode(XmlTagHandler tag, PrintStream out, int indent)
throws XmlTagException {
XmlTagInfo[] subTags = tag.getSubTags();
out.println(StringUtil.repeatChars(' ', indent) + "Tag <" + tag.getName() + ">:");
if (tag instanceof XmlAttrHandler) {
XmlAttr[] attrs;
attrs = ((XmlAttrHandler) tag).getAttributes();
if (attrs.length == 0)
out.println(
StringUtil.repeatChars(' ', indent) + "- has no required or optional attributes");
XmlParser.dumpAttrs(attrs, "REQUIRED", XmlAttr.REQUIRED, out, indent);
XmlParser.dumpAttrs(attrs, "OPTIONAL", XmlAttr.OPTIONAL, out, indent);
} else {
out.println(StringUtil.repeatChars(' ', indent) + "- has no required or optional attributes");
}
if (tag instanceof XmlUnAttrHandler)
out.println(StringUtil.repeatChars(' ', indent) + "- handles arbitrary attributes");
subTags = tag.getSubTags();
if (subTags.length == 0) {
out.println(StringUtil.repeatChars(' ', indent) + "- has no subtags");
} else {
for (int i = 0; i < subTags.length; i++) {
String name = subTags[i].getTag().getName();
int type = subTags[i].getType();
out.print(StringUtil.repeatChars(' ', indent) + "- has subtag <" + name + ">, which ");
switch (type) {
case XmlTagInfo.REQUIRED:
out.println("is REQUIRED");
break;
case XmlTagInfo.OPTIONAL:
out.println("is OPTIONAL");
break;
case XmlTagInfo.ONE_OR_MORE:
out.println("is REQUIRED at least ONCE");
break;
case XmlTagInfo.ZERO_OR_MORE:
out.println("can be specified any # of times");
break;
}
XmlParser.dumpNode(subTags[i].getTag(), out, indent + 4);
}
}
}
public static void dump(XmlTagHandler root, PrintStream out) {
try {
XmlParser.dumpNode(root, out, 0);
} catch (XmlTagException exc) {
out.println("Error traversing tags: " + exc.getMessage());
}
}
/** General parsing used by both parse methods above */
private static void generalParse(XmlTagHandler tag, Document doc) throws XmlParseException {
Element root = doc.getRootElement();
if (!root.getName().equalsIgnoreCase(tag.getName())) {
throw new XmlParseException(
"Incorrect root tag. Expected <" + tag.getName() + "> but got <" + root.getName() + ">");
}
XmlParser.processNode(root, tag, new DummyFilter());
}
private static void processNode(Element elem, XmlTagHandler tag, XmlFilterHandler filter)
throws XmlAttrException, XmlTagException {
if (tag instanceof XmlTagEntryHandler) {
((XmlTagEntryHandler) tag).enter();
}
if (tag instanceof XmlFilterHandler) {
filter = (XmlFilterHandler) tag;
}
XmlParser.checkAttributes(elem, tag, filter);
if (tag instanceof XmlTextHandler) {
((XmlTextHandler) tag).handleText(elem.getText());
}
XmlParser.checkSubNodes(elem, tag, filter);
if (tag instanceof XmlTagExitHandler) {
((XmlTagExitHandler) tag).exit();
}
}
public Document newDocument() throws SAXException {
Document docResult = null;
try {
DocumentBuilderFactory factory = XmlParser.createDocumentBuilderFactory();
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setErrorHandler(new ErrorHandler());
docResult = builder.newDocument();
} catch (ParserConfigurationException e) {
throw new SAXException(e);
}
return docResult;
}
public void writeDocument(Document doc, String file) throws IOException, SAXException {
try {
TransformerFactory factory = XmlParser.createTransformerFactory();
Transformer trans = factory.newTransformer();
trans.setOutputProperty("indent", "yes");
trans.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
DOMSource src = new DOMSource(doc);
StreamResult result = new StreamResult(new File(file));
trans.transform(src, result);
} catch (TransformerException e) {
throw new SAXException(e);
}
}
private static void checkSubNodes(Element elem, XmlTagHandler tag, XmlFilterHandler filter)
throws XmlAttrException, XmlTagException {
XmlTagInfo[] subTags = tag.getSubTags();
Map hash;
hash = new HashMap();
// First, count how many times each sub-tag is referenced
for (Iterator i = elem.getChildren().iterator(); i.hasNext(); ) {
Element e = (Element) i.next();
String name;
Integer val;
name = e.getName().toLowerCase();
if ((val = (Integer) hash.get(name)) == null) {
val = new Integer(0);
}
val = new Integer(val.intValue() + 1);
hash.put(name, val);
}
for (int i = 0; i < subTags.length; i++) {
String name = subTags[i].getTag().getName().toLowerCase();
Integer iVal = (Integer) hash.get(name);
int threshold = 0, val;
val = iVal == null ? 0 : iVal.intValue();
switch (subTags[i].getType()) {
case XmlTagInfo.REQUIRED:
if (val == 0) {
throw new XmlMissingTagException(elem, name);
} else if (val != 1) {
throw new XmlTooManyTagException(elem, name);
}
break;
case XmlTagInfo.OPTIONAL:
if (val > 1) {
throw new XmlTooManyTagException(elem, name);
}
break;
case XmlTagInfo.ONE_OR_MORE:
threshold++;
case XmlTagInfo.ZERO_OR_MORE:
if (val < threshold) {
throw new XmlMissingTagException(elem, name);
}
break;
}
hash.remove(name);
}
// Now check for excess sub-tags
if (hash.size() != 0) {
Set keys = hash.keySet();
throw new XmlTooManyTagException(elem, (String) keys.iterator().next());
}
// Recurse to all sub-tags
for (Iterator i = elem.getChildren().iterator(); i.hasNext(); ) {
Element child = (Element) i.next();
for (int j = 0; j < subTags.length; j++) {
XmlTagHandler subTag = subTags[j].getTag();
String subName = subTag.getName();
if (child.getName().equalsIgnoreCase(subName)) {
XmlParser.processNode(child, subTag, filter);
break;
}
}
}
}
public Document readDocument(Object source, Node after) throws IOException, SAXException {
Document docResult = null;
try {
DocumentBuilderFactory factory = XmlParser.createDocumentBuilderFactory();
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setErrorHandler(new ErrorHandler());
File f = null;
if (source instanceof String) {
f = new File((String) source);
docResult = builder.parse(f);
} else if (source instanceof InputStream) {
docResult = builder.parse((InputStream) source);
}
Node nodeRoot = docResult.getFirstChild();
// //////////////////////////////////////////////////////
// Make sure we have a DBSetup XML file.
// This is dumb, because there could be an XML comment before
// the root element. The root node is not the same thing as the
// root element.
if (nodeRoot.getNodeName().equalsIgnoreCase("Covalent.DBSetup") == false) {
if (source instanceof String) {
throw new IOException(source.toString() + " is not a DBSetup XML file.");
} else {
throw new IOException("Source is not a DBSetup XML file.");
}
}
// ///////////////////////////////////////////////////////
// Look for include tags
NodeList listNodes = nodeRoot.getChildNodes();
for (int iNode = 0; iNode < listNodes.getLength(); iNode++) {
Node node = listNodes.item(iNode);
if (node.getNodeName().equalsIgnoreCase("include") == true) {
NamedNodeMap map = node.getAttributes();
for (int iAttr = 0; iAttr < map.getLength(); iAttr++) {
Node nodeMap = map.item(iAttr);
if (nodeMap.getNodeName().equalsIgnoreCase("file") == true) {
File fileInclude = new File(nodeMap.getNodeValue());
if (fileInclude.isAbsolute() == false) {
if (!(source instanceof String)) {
throw new IOException("Cannot resolve paths" + " relative to a " + "stream.");
}
String strPath = f.getAbsolutePath();
int iIndex = strPath.lastIndexOf(File.separatorChar);
strPath = strPath.substring(0, iIndex);
fileInclude = new File(strPath + File.separatorChar + fileInclude.getPath());
}
this.readDocument(fileInclude.getAbsolutePath(), node);
nodeRoot.removeChild(node);
}
}
} else if (after != null) DBSetup.importNodeAfter(after, node, true);
}
} catch (ParserConfigurationException e) {
throw new SAXException(e);
}
return docResult;
}
