OraTLVpublic class OraTLV extends TagLibraryValidator | This is an example of a TagLibraryValidator class. It only validates
the use of the dummy <xmp:child> action element in a dummy tag
library, but it serves as an extendable validator for a real tag
library. |
| Fields Summary |
|---|
| private SAXBuilder | builder | | private Namespace | jspNamespace |
| Methods Summary |
|---|
| private Element | findParent(Element e, Namespace ns, java.lang.String name)Returns the closest parent element of the specified element that
matches the specified namespace and name.
if (e.getName().equals(name) &&
ns.equals(e.getNamespace())) {
return e;
}
Element parent = e.getParent();
if (parent != null) {
return findParent(parent, ns, name);
}
return null;
| | public ValidationMessage[] | validate(java.lang.String prefix, java.lang.String uri, PageData pd)Returns a ValidationMessage array with information about validation
errors, or null if no errors are found.
ValidationMessage[] vms = null;
ArrayList msgs = new ArrayList();
Namespace taglibNamespace = Namespace.getNamespace(uri);
try {
Document doc = builder.build(pd.getInputStream());
Element root = doc.getRootElement();
validateElement(root, taglibNamespace, msgs);
}
catch (Exception e) {
vms = new ValidationMessage[1];
vms[0] = new ValidationMessage(null, e.getMessage());
}
if (msgs.size() != 0) {
vms = new ValidationMessage[msgs.size()];
msgs.toArray(vms);
}
return vms;
| | private void | validateChild(Element e, Namespace ns, java.util.ArrayList msgs)Validates that a "child" element is only used within the body of
a "parent" element. If not, a ValidationMessage is added to the
message array.
Element parent = findParent(e, ns, "parent");
if (parent == null) {
String id = e.getAttributeValue("id", jspNamespace);
ValidationMessage vm = new ValidationMessage(id,
e.getQualifiedName() + " must only be used with 'parent'");
msgs.add(vm);
}
| | private void | validateElement(Element e, Namespace ns, java.util.ArrayList msgs)Dispatches to the appropriate validation method for the
specified element, and calls itself recursively for all
children of the element.
if (ns.equals(e.getNamespace())) {
if (e.getName().equals("child")) {
validateChild(e, ns, msgs);
}
}
if (e.hasChildren()) {
List kids = e.getChildren();
Iterator i = kids.iterator();
while(i.hasNext()) {
validateElement((Element) i.next(), ns, msgs);
}
}
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