use of org.apache.commons.jelly.impl.TagScript in project hudson-2.x by hudson.
the class MorphTagLibrary method createTagScript.
@Override
public TagScript createTagScript(final String tagName, Attributes attributes) throws JellyException {
return new TagScript() {
private Object evalAttribute(String name, JellyContext context) {
ExpressionAttribute e = attributes.get(name);
if (e == null)
return null;
return e.exp.evaluate(context);
}
private Collection<?> getExclusions(JellyContext context) {
Object exclusion = evalAttribute(EXCEPT_ATTRIBUTES, context);
if (exclusion == null)
return Collections.emptySet();
if (exclusion instanceof String)
// split by whitespace
return Arrays.asList(exclusion.toString().split("\\s+"));
if (exclusion instanceof Collection)
return (Collection) exclusion;
throw new IllegalArgumentException("Expected collection for exclusion but found :" + exclusion);
}
@Override
public void run(JellyContext context, XMLOutput output) throws JellyTagException {
AttributesImpl actual = new AttributesImpl();
Collection<?> exclusions = getExclusions(context);
Map<String, ?> meta = (Map) evalAttribute(META_ATTRIBUTES, context);
if (meta != null) {
for (Map.Entry<String, ?> e : meta.entrySet()) {
String key = e.getKey();
// @see jelly.impl.DynamicTag.setAttribute() -- ${attrs} has duplicates with "Attr" suffix
if (key.endsWith("Attr") && meta.containsKey(key.substring(0, key.length() - 4)))
continue;
// @see http://github.com/hudson/jelly/commit/4ae67d15957b5b4d32751619997a3cb2a6ad56ed
if (key.equals("ownerTag"))
continue;
if (!exclusions.contains(key)) {
Object v = e.getValue();
if (v != null)
actual.addAttribute("", key, key, "CDATA", v.toString());
}
}
} else {
meta = Collections.emptyMap();
}
for (Map.Entry<String, ExpressionAttribute> e : attributes.entrySet()) {
String name = e.getKey();
// already handled
if (name.equals(META_ATTRIBUTES) || name.equals(EXCEPT_ATTRIBUTES))
continue;
if (meta.containsKey(name)) {
// if the explicit value is also generated by a map, delete it first.
// this is O(N) operation, but we don't expect there to be a lot of collisions.
int idx = actual.getIndex(name);
if (idx >= 0)
actual.removeAttribute(idx);
}
Expression expression = e.getValue().exp;
actual.addAttribute("", name, name, "CDATA", expression.evaluateAsString(context));
}
try {
output.startElement(tagName, actual);
getTagBody().run(context, output);
output.endElement(tagName);
} catch (SAXException x) {
throw new JellyTagException(x);
}
}
};
}
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