/**
* Resolve locale-specific inheritance. First, resolve parent's inheritance, then set template to
* the parent's template. Also copy attributes setted in parent, and not set in child If instance
* doesn't extend anything, do nothing.
*
* @param definition The definition to resolve
* @param locale The locale to use.
* @param alreadyResolvedDefinitions The set of the definitions that have been already resolved.
* @throws NoSuchDefinitionException If an inheritance can not be solved.
*/
protected void resolveInheritance(
Definition definition, Locale locale, Set<String> alreadyResolvedDefinitions)
throws NoSuchDefinitionException {
// Already done, or not needed ?
if (!definition.isExtending() || alreadyResolvedDefinitions.contains(definition.getName())) {
return;
}
if (log.isDebugEnabled()) {
log.debug(
"Resolve definition for child name='"
+ definition.getName()
+ "' extends='"
+ definition.getExtends()
+ "'.");
}
// Set as visited to avoid endless recurisvity.
alreadyResolvedDefinitions.add(definition.getName());
// Resolve parent before itself.
Definition parent = getDefinition(definition.getExtends(), locale);
if (parent == null) { // error
String msg =
"Error while resolving definition inheritance: child '"
+ definition.getName()
+ "' can't find its ancestor '"
+ definition.getExtends()
+ "'. Please check your description file.";
log.error(msg);
// to do : find better exception
throw new NoSuchDefinitionException(msg);
}
resolveInheritance(parent, locale, alreadyResolvedDefinitions);
overload(parent, definition);
}
// FIXME This is the same as DefinitionManager.overload.
protected void overload(Definition parent, Definition child) {
// Iterate on each parent's attribute and add it if not defined in child.
for (Map.Entry<String, Attribute> entry : parent.getAttributes().entrySet()) {
if (!child.hasAttributeValue(entry.getKey())) {
child.putAttribute(entry.getKey(), new Attribute(entry.getValue()));
}
}
// Set template and role if not setted
if (child.getTemplate() == null) {
child.setTemplate(parent.getTemplate());
}
if (child.getRole() == null) {
child.setRole(parent.getRole());
}
if (child.getPreparer() == null) {
child.setPreparer(parent.getPreparer());
}
}
