/**
* Generates a new instance of an anonymous inner class that implements the PageNode interface.
*
* @param pageClass The class providing the widget content for the page.
* @param pageName The name of the page (to be used in the URL history fragment).
*/
private ObjectBuilder generateNewInstanceOfPageImpl(MetaClass pageClass, String pageName) {
AnonymousClassStructureBuilder pageImplBuilder =
ObjectBuilder.newInstanceOf(
MetaClassFactory.parameterizedAs(
PageNode.class, MetaClassFactory.typeParametersOf(pageClass)))
.extend();
pageImplBuilder
.publicMethod(String.class, "name")
.append(Stmt.loadLiteral(pageName).returnValue())
.finish()
.publicMethod(Class.class, "contentType")
.append(Stmt.loadLiteral(pageClass).returnValue())
.finish()
.publicMethod(
void.class, "produceContent", Parameter.of(CreationalCallback.class, "callback"))
.append(
Stmt.nestedCall(Refs.get("bm"))
.invoke("lookupBean", Stmt.loadLiteral(pageClass))
.invoke("getInstance", Stmt.loadVariable("callback")))
.finish();
appendPageHidingMethod(pageImplBuilder, pageClass);
appendPageHiddenMethod(pageImplBuilder, pageClass);
appendPageShowingMethod(pageImplBuilder, pageClass);
appendPageShownMethod(pageImplBuilder, pageClass);
return pageImplBuilder.finish();
}
public static Collection<Statement> createAllPropertyBindings(final Statement proxyRef,
final Map<String, ProxyProperty> proxyProperties) {
final List<Statement> statementList = new ArrayList<Statement>();
for (final Map.Entry<String, ProxyProperty> entry : proxyProperties.entrySet()) {
statementList.add(Stmt.nestedCall(proxyRef).invoke("$set_" + entry.getKey(), entry.getValue().getOriginalValueReference()));
}
return statementList;
}
public static Statement closeProxy(final Statement proxyReference, final Statement beanInstance) {
return Stmt.nestedCall(proxyReference).invoke(PROXY_BIND_METHOD, beanInstance);
}
@Override
protected String generate(TreeLogger logger, GeneratorContext context) {
final ClassStructureBuilder<?> classBuilder =
Implementations.extend(NavigationGraph.class, GENERATED_CLASS_NAME);
// accumulation of (name, pageclass) mappings for dupe detection and dot file generation
BiMap<String, MetaClass> pageNames = HashBiMap.create();
// accumulation UniquePageRoles for ensuring there is exactly one.
Multimap<Class<?>, MetaClass> pageRoles = ArrayListMultimap.create();
ConstructorBlockBuilder<?> ctor = classBuilder.publicConstructor();
final Collection<MetaClass> pages = ClassScanner.getTypesAnnotatedWith(Page.class, context);
for (MetaClass pageClass : pages) {
if (!pageClass.isAssignableTo(IsWidget.class)) {
throw new GenerationException(
"Class "
+ pageClass.getFullyQualifiedName()
+ " is annotated with @Page, so it must implement IsWidget");
}
Page annotation = pageClass.getAnnotation(Page.class);
String pageName = getPageName(pageClass);
List<Class<? extends PageRole>> annotatedPageRoles = Arrays.asList(annotation.role());
MetaClass prevPageWithThisName = pageNames.put(pageName, pageClass);
if (prevPageWithThisName != null) {
throw new GenerationException(
"Page names must be unique, but "
+ prevPageWithThisName
+ " and "
+ pageClass
+ " are both named ["
+ pageName
+ "]");
}
Statement pageImplStmt = generateNewInstanceOfPageImpl(pageClass, pageName);
if (annotatedPageRoles.contains(DefaultPage.class)) {
// need to assign the page impl to a variable and add it to the map twice
ctor.append(Stmt.declareFinalVariable("defaultPage", PageNode.class, pageImplStmt));
pageImplStmt = Variable.get("defaultPage");
ctor.append(Stmt.nestedCall(Refs.get("pagesByName")).invoke("put", "", pageImplStmt));
ctor.append(
Stmt.nestedCall(Refs.get("pagesByRole"))
.invoke("put", DefaultPage.class, pageImplStmt));
} else if (pageName.equals("")) {
throw new GenerationException(
"Page "
+ pageClass.getFullyQualifiedName()
+ " has an empty path. Only the"
+ " page with startingPage=true is permitted to have an empty path.");
}
final String fieldName = StringUtils.uncapitalize(pageClass.getName());
ctor.append(Stmt.declareFinalVariable(fieldName, PageNode.class, pageImplStmt));
ctor.append(
Stmt.nestedCall(Refs.get("pagesByName")).invoke("put", pageName, Refs.get(fieldName)));
for (Class<? extends PageRole> annotatedPageRole : annotatedPageRoles) {
pageRoles.put(annotatedPageRole, pageClass);
// DefaultPage is already added above.
if (!annotatedPageRole.equals(DefaultPage.class))
ctor.append(
Stmt.nestedCall(Refs.get("pagesByRole"))
.invoke("put", annotatedPageRole, Refs.get(fieldName)));
}
}
ctor.finish();
renderNavigationToDotFile(pageNames);
validateDefaultPagePresent(pages, pageRoles);
validateUnique(pageRoles);
return classBuilder.toJavaString();
}