/** Returns a id unique within the facelet context. */
public String generateUniqueId() {
String id;
TagAttribute idAttr = tagConfig.getTag().getAttributes().get("id");
if (idAttr != null) {
id = idAttr.getValue(context);
} else {
id = context.getFacesContext().getViewRoot().createUniqueId();
}
return generateUniqueId(id);
}
/**
* Copies tag attributes with given names from the tag config, using given id as base for the id
* attribute.
*/
public TagAttributes copyTagAttributes(String id, String... names) {
List<TagAttribute> list = new ArrayList<TagAttribute>();
list.add(createIdAttribute(id));
for (String name : names) {
if ("id".equals(name)) {
// ignore
continue;
}
TagAttribute attr = tagConfig.getTag().getAttributes().get(name);
if (attr != null) {
list.add(attr);
}
}
TagAttribute[] attrs = list.toArray(new TagAttribute[list.size()]);
return new TagAttributes(attrs);
}
/**
* Creates an attribute with given name and value.
*
* <p>The attribute namespace is assumed to be empty.
*/
public TagAttribute createAttribute(String name, String value) {
if (value == null || value instanceof String) {
return new TagAttribute(tagConfig.getTag().getLocation(), "", name, name, value);
}
return null;
}
/** Creates a unique id and returns corresponding attribute, using given string id as base. */
public TagAttribute createIdAttribute(String base) {
String value = generateUniqueId(base);
return new TagAttribute(tagConfig.getTag().getLocation(), "", "id", "id", value);
}