/**
* Do you smell something? I'm smelling that this class needs to be redesigned to not need a
* central method this large and hard to test. I think a lot of instance and local variables need
* to be bundled up into some kind of process object. This code is effectively too big to be
* tested except through integration testing.
*/
private void loadTemplateForComponent(final ComponentPageElement loadingElement) {
this.loadingElement = loadingElement;
loadingComponentModel = loadingElement.getComponentResources().getComponentModel();
String componentClassName = loadingComponentModel.getComponentClassName();
ComponentTemplate template = templateSource.getTemplate(loadingComponentModel, locale);
// When the template for a component is missing, we pretend it consists of just a RenderBody
// phase. Missing is not an error ... many component simply do not have a template.
if (template.isMissing()) {
this.loadingElement.addToTemplate(new RenderBodyElement(this.loadingElement));
return;
}
// Pre-allocate ids to avoid later name collisions.
// Don't have a case-insensitive Set, so we'll make due with a Map
Map<String, Boolean> embeddedIds = collectedEmbeddedComponentIds(loadingComponentModel);
idAllocator.clear();
final Map<String, Location> componentIdsMap = template.getComponentIds();
for (String id : componentIdsMap.keySet()) {
idAllocator.allocateId(id);
embeddedIds.remove(id);
}
if (!embeddedIds.isEmpty())
throw new RuntimeException(
ServicesMessages.embeddedComponentsNotInTemplate(
embeddedIds.keySet(), componentClassName, template.getResource()));
addAttributesAsComponentBindings = false;
// The outermost elements of the template belong in the loading component's template list,
// not its body list. This shunt allows everyone else to not have to make that decision,
// they can add to the "body" and (if there isn't an active component), the shunt will
// add the element to the component's template.
BodyPageElement shunt =
new BodyPageElement() {
public void addToBody(PageElement element) {
loadingElement.addToTemplate(element);
}
};
bodyPageElementStack.push(shunt);
for (TemplateToken token : template.getTokens()) {
switch (token.getTokenType()) {
case TEXT:
text((TextToken) token);
break;
case EXPANSION:
expansion((ExpansionToken) token);
break;
case BODY:
body();
break;
case START_ELEMENT:
startElement((StartElementToken) token);
break;
case START_COMPONENT:
startComponent((StartComponentToken) token);
break;
case ATTRIBUTE:
attribute((AttributeToken) token);
break;
case END_ELEMENT:
endElement();
break;
case COMMENT:
comment((CommentToken) token);
break;
case BLOCK:
block((BlockToken) token);
break;
case PARAMETER:
parameter((ParameterToken) token);
break;
case DTD:
dtd((DTDToken) token);
break;
case DEFINE_NAMESPACE_PREFIX:
defineNamespacePrefix((DefineNamespacePrefixToken) token);
break;
case CDATA:
cdata((CDATAToken) token);
break;
default:
throw new IllegalStateException("Not implemented yet: " + token);
}
}
// For neatness / symmetry:
bodyPageElementStack.pop(); // the shunt
// TODO: Check that all stacks are empty. That should never happen, as long
// as the ComponentTemplate is valid.
}
