/**
* Finds the parent layout template that will surround the inner layout template. By default it
* will look in the same directory as the inner template for a template called 'layout'.
*
* @param newViewName not null.
* @param templateLoader not null.
* @return null if not found.
* @throws Exception
*/
protected String findParentLayoutTemplate(String newViewName, TemplateLoader templateLoader)
throws Exception {
String parentTemplate = null;
String[] paths = StringUtils.tokenizeToStringArray(newViewName, "/");
if (paths == null) return null;
List<String> ps = new ArrayList<String>();
String cur = "";
for (String p : paths) {
if (hasText(p)) {
cur = cur + "/" + p;
ps.add(cur);
}
}
reverse(ps);
if (!ps.isEmpty()) {
ps.remove(0);
for (String p : ps) {
try {
String n = p + "/" + getLayoutTemplateName();
templateLoader.getTemplate(n);
parentTemplate = n;
break;
} catch (FileNotFoundException e1) {
// Ignore as there is no layout template.
}
}
}
return parentTemplate;
}
@Override
protected AbstractUrlBasedView buildView(String viewName) throws Exception {
final MustacheView view = (MustacheView) super.buildView(viewName);
URI uri = new URI(viewName);
String newViewName = uri.getPath();
Map<String, String> aliases = parseQueryString(uri.getQuery());
view.setPartialAliases(aliases);
/*
* Normalize the path.
*/
if (endsWithIgnoreCase(getPrefix(), "/") && startsWithIgnoreCase(newViewName, "/")) {
newViewName = trimLeadingCharacter(newViewName, '/');
}
TemplateLoader templateLoader = this.templateLoader.withPartialAliases(aliases);
Compiler compiler = this.compiler.withLoader(templateLoader);
/*
* Reset the view url
*/
view.setUrl(getPrefix() + newViewName + getSuffix());
aliases.put(getInnerPartialAlias(), newViewName);
/*
* Go find the parent layout template if one is not defined.
* We walk up the tree to find the parent.
*/
if (!hasText(aliases.get(getLayoutPartialAlias()))) {
String parentTemplate = findParentLayoutTemplate(newViewName, templateLoader);
if (hasText(parentTemplate)) aliases.put(getLayoutPartialAlias(), parentTemplate);
}
String templateName = null;
boolean found =
hasText(templateName = aliases.get(getLayoutPartialAlias()))
|| hasText(templateName = aliases.get(getInnerPartialAlias()));
if (found) view.setTemplate(compiler.compile(templateLoader.getTemplate(templateName)));
else throw new IllegalStateException("Body is missing");
return view;
}