/** returns a child request which is not a "context, paramSet, documentation or meta" element */
public FXRequest getSubRequest(int position) throws Exception // which kind
{
SafeNodeIterator nl = getChildNodes();
if (nl == null) {
return null;
}
Node n = nl.next();
while (n != null) {
if (n.getType() == Node.ELEMENT) {
String tagname = ((Node) n).getName().getLocalPart();
NodeExtension ne = n.getNodeExtension();
if ((ne instanceof FXContextImpl)
|| (ne instanceof Import)
|| (ne instanceof DocumentationImpl)
|| (ne instanceof ParamSetImpl)
|| "context".equals(tagname)) {
// skip the context, we already got it
} else {
if (--position == 0) {
return (FXRequest) ne;
}
}
}
n = nl.next();
}
return null;
}
private void stashDefaultParams(FXContextImpl context, SafeNodeIterator nl) {
Node n = nl.next();
while (n != null) {
String name = n.getAttributeValue(name("name"));
if (name != null && name.length() > 0) {
Object val = FXContextImpl.getParamBindingValue(n, context);
context.putDefault(name, val);
}
n = nl.next();
}
}
public NodeIterator eval(Node node, ExprContext context) {
return new SingleNodeIterator(node.getParent());
}
public NodeIterator eval(Node node, ExprContext context) {
return node.getChildren();
}
/** copy the element, and contents to the result */
protected void evalCopy(ContentHandler responseTarget, FXContext context) throws Exception {
// System.out.println("FXRequestServerSide::evalCopy()");
context = extendContext(context);
if (context == null) {
throw new Exception("null context");
}
try {
// copy the attributes
AttributesImpl atts = new AttributesImpl();
// NamedNodeMap attsList = getAttributes();
SafeNodeIterator ni = getNode().getAttributes();
for (; ; ) {
Node att = ni.next();
if (att == null) {
break;
}
Name attName = att.getName();
String attNS = attName.getNamespace();
if (attNS == null) {
attNS = "";
}
String localName = attName.getLocalPart();
String anp = attName.getPrefix();
String qname = anp == null ? localName : (anp + ":" + localName);
if (localName == null) {
localName = qname;
}
String val = att.getData();
try {
// FIXME: do not do unless needed
if (val.indexOf('{') >= 0) {
val = FXContextImpl.parseAttributeExpr(val, (FXContextImpl) context);
//
// Expression exp =
// XRExp.parseExpr(new StringReader((String)val));
// StringWriter sw = new StringWriter();
// exp.eval(context, sw);
// val = sw.toString();
}
} catch (Throwable ex) {
ex.printStackTrace();
val =
"** expression error: "
+ // ex.getMessage() +
"in ["
+ val
+ "] **";
}
atts.addAttribute(attNS, localName, qname, "CDATA", val);
}
String nsURI = getNamespaceURI();
if (nsURI == null) {
nsURI = "";
}
String tagName = getTagName();
String localName = getNode().getName().getLocalPart(); // getLocalName();
evalBody(responseTarget, context, nsURI, localName, tagName, atts);
} catch (Exception ex) {
ex.printStackTrace();
errorResponse(ex, responseTarget, context);
}
}
public String getAttributeValue(String attName) {
Node mine = getNode();
return mine.getAttributeValue(name(attName));
}
/** adds a new context frame, attaching any locally bound parameters */
public FXContext extendContext(FXContext parentContext) throws Exception {
FXContext ctx = null;
if (parentContext == null) {
Name self = getNode().getName();
System.out.println("no context in " + self.getNamespace() + ":" + self.getLocalPart());
throw new Exception("null context in " + self.getNamespace() + ":" + self.getLocalPart());
}
parentContext = parentContext.extend();
ctx = parentContext;
ctx.setNode(this.getNode());
// first, we pick up attributes
SafeNodeIterator atts = this.getNode().getAttributes();
// FIXME: do we really wanna always add attrs to context?
// what about arbitrary, non-echo elements?
if (atts != null) {
Node n = atts.next();
while (n != null) {
String attrName = n.getName().getLocalPart();
/// System.out.println("FXRequestServerSide:: extending context with : " + attrName);
if (!attrName.equals("userID") && !attrName.startsWith("xmlns")) {
if (!"{''}".equals(n.getData())) {
// new behavior resolves attribute expressions during extend context
ctx.put(
n.getName().getLocalPart(),
FXContextImpl.parseAttributeExpr(n.getData(), parentContext));
} else {
ctx.put(n.getName().getLocalPart(), n.getData());
}
}
n = atts.next();
}
}
// process context and paramset children, in order
SafeNodeIterator nl = this.getNode().getChildren();
Node n = nl.next();
while (n != null) {
if (n.getType() == Node.ELEMENT) {
// String tagname = ((Element) n).getTagName();
NodeExtension ne = n.getNodeExtension();
if (ne instanceof FXContext) {
ctx = ((FXContextImpl) parentContext).extend((FXContext) ne);
parentContext = ctx;
} else if (ne instanceof Import) {
ctx = ((Import) ne).getBindings(parentContext);
parentContext = ctx;
} else if (ne instanceof ParamSetImpl) {
// stashDefaultParams((FXContextImpl) parentContext,
// ((Element)
// n).getElementsByTagNameNS(FXHome.NAMESPACE,
// "param"));
// stashDefaultParams((FXContextImpl) parentContext,
// ((Element)
// n).getElementsByTagNameNS("http://namespaces.snapbridge.com/xrap",
// "param"));
// stashDefaultParams((FXContextImpl) parentContext,
// ((Element)
// n).getElementsByTagNameNS(FXHome.NAMESPACE,
//
// "function"));
// stashDefaultParams((FXContextImpl) parentContext,
// ((Element)
// n).getElementsByTagNameNS("http://namespaces.snapbridge.com/xrap",
//
// "function"));
// // FIXME: we should deprecate non-namespaced params?
// stashDefaultParams((FXContextImpl) parentContext,
// ((Element) n).getElementsByTagName("param"));
}
}
n = nl.next();
}
parentContext.put("ctx:elementName", this.getTagName());
parentContext.put("ctx:commandName", this.getClass().getName());
SourceLocator loc = this.getNode(); // FIXME: location from node! this.getLocation();
if (loc != null) {
parentContext.put("ctx:sysID", "" + loc.getSystemId());
parentContext.put("ctx:lineNo", "" + loc.getLineNumber());
parentContext.put("ctx:colNo", "" + loc.getColumnNumber());
}
return parentContext;
}
public void processChildren(ContentHandler responseTarget, FXContext context, boolean trim)
throws Exception {
SafeNodeIterator kids = getChildNodes();
char[] chars;
Node n = kids.next();
while (n != null) {
NodeExtension ne = n.getNodeExtension();
if (ne instanceof FXRequest) {
if (!(ne instanceof FXContextImpl)
&& !(ne instanceof ParamSetImpl)
&& !(ne instanceof Import)
&& !(ne instanceof DocumentationImpl)
&& !(ne instanceof NullTransformImpl)) {
FXRequest child = (FXRequest) ne;
XMLReader reader = new NullDocEventXMLFilter(context, child);
String uri = child.getURI(context);
InputSource is = new InputSource(uri);
reader.setContentHandler(responseTarget);
reader.parse(is);
} else {
// we ignore these guys
}
} else {
switch (n.getType()) {
case Node.PROCESSING_INSTRUCTION:
responseTarget.processingInstruction(n.getName().getLocalPart(), n.getData());
break;
case Node.TEXT:
chars = n.getData().toCharArray();
if (trim) {
int cl = chars.length;
int j = 0;
for (; j < cl; ++j) {
if (!Character.isWhitespace(chars[j])) {
break;
}
}
for (; j < cl; --cl) {
if (!Character.isWhitespace(chars[cl - 1])) {
responseTarget.characters(chars, j, cl - j);
break;
}
}
} else {
responseTarget.characters(chars, 0, chars.length);
}
break;
case Node.COMMENT:
//
if (responseTarget instanceof LexicalHandler) {
chars = n.getData().toCharArray();
((LexicalHandler) responseTarget).comment(chars, 0, chars.length);
}
break;
default:
throw new Exception("FX unable to process DOM node type");
}
}
n = kids.next();
}
}