/**
* Loads a design for the given root component.
*
* <p>This methods assumes that the component class (or a super class) has been marked with an
* {@link DesignRoot} annotation and will either use the value from the annotation to locate the
* design file, or will fall back to using a design with the same same as the annotated class file
* (with an .html extension)
*
* <p>Any {@link Component} type fields in the root component which are not assigned (i.e. are
* null) are mapped to corresponding components in the design. Matching is done based on field
* name in the component class and id/local id/caption in the design file.
*
* <p>The type of the root component must match the root element in the design
*
* @param rootComponent The root component of the layout
* @return The design context used in the load operation
* @throws DesignException If the design could not be loaded
*/
public static DesignContext read(Component rootComponent) throws DesignException {
// Try to find an @DesignRoot annotation on the class or any parent
// class
Class<? extends Component> annotatedClass =
findClassWithAnnotation(rootComponent.getClass(), DesignRoot.class);
if (annotatedClass == null) {
throw new IllegalArgumentException(
"The class "
+ rootComponent.getClass().getName()
+ " or any of its superclasses do not have an @DesignRoot annotation");
}
DesignRoot designAnnotation = annotatedClass.getAnnotation(DesignRoot.class);
String filename = designAnnotation.value();
if (filename.equals("")) {
// No value, assume the html file is named as the class
filename = annotatedClass.getSimpleName() + ".html";
}
InputStream stream = annotatedClass.getResourceAsStream(filename);
if (stream == null) {
throw new DesignException(
"Unable to find design file "
+ filename
+ " in "
+ annotatedClass.getPackage().getName());
}
Document doc = parse(stream);
DesignContext context = designToComponentTree(doc, rootComponent, annotatedClass);
return context;
}
/**
* Loads a design from the given file name using the given root component.
*
* <p>Any {@link Component} type fields in the root component which are not assigned (i.e. are
* null) are mapped to corresponding components in the design. Matching is done based on field
* name in the component class and id/local id/caption in the design file.
*
* <p>The type of the root component must match the root element in the design.
*
* @param filename The file name to load. Loaded from the same package as the root component
* @param rootComponent The root component of the layout
* @return The design context used in the load operation
* @throws DesignException If the design could not be loaded
*/
public static DesignContext read(String filename, Component rootComponent)
throws DesignException {
InputStream stream = rootComponent.getClass().getResourceAsStream(filename);
if (stream == null) {
throw new DesignException(
"File "
+ filename
+ " was not found in the package "
+ rootComponent.getClass().getPackage().getName());
}
return read(stream, rootComponent);
}
/**
* Constructs a component hierarchy from the design specified as an html tree.
*
* <p>If a component root is given, the component instances created during reading the design are
* assigned to its member fields based on their id, local id, and caption
*
* @param doc the html tree
* @param componentRoot optional component root instance. The type must match the type of the root
* element in the design. Any member fields whose type is assignable from {@link Component}
* are bound to fields in the design based on id/local id/caption
*/
private static DesignContext designToComponentTree(Document doc, Component componentRoot) {
if (componentRoot == null) {
return designToComponentTree(doc, null, null);
} else {
return designToComponentTree(doc, componentRoot, componentRoot.getClass());
}
}
private void bindEventHandler(
Component componentRoot, Object controller, Method method, UiHandler eventListener) {
String componentId = eventListener.value();
Component component = Clara.findComponentById(componentRoot, componentId);
if (component == null) {
throw new BinderException("No component found for id: " + componentId + ".");
}
Class<?> eventType =
(method.getParameterTypes().length > 0 ? method.getParameterTypes()[0] : null);
if (eventType == null) {
throw new BinderException("Couldn't figure out event type for method " + method + ".");
}
Method addListenerMethod = getAddListenerMethod(component.getClass(), eventType);
if (addListenerMethod != null) {
try {
Object listener =
createListenerProxy(
addListenerMethod.getParameterTypes()[0], eventType, method, controller);
addListenerMethod.invoke(component, listener);
// TODO exception handling
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
@Override
public String componentToTag(Component component, DesignContext context) {
Class<?> componentClass = component.getClass();
String packageName = componentClass.getPackage().getName();
String prefix = context.getPackagePrefix(packageName);
if (prefix == null) {
prefix = packageName.replace('.', '_');
context.addPackagePrefix(prefix, packageName);
}
prefix = prefix + "-";
String className = classNameToElementName(componentClass.getSimpleName());
String tagName = prefix + className;
return tagName;
}
