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package com.vaadin.tests.components;
import java.io.File;
import java.io.FileInputStream;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.Component;
import com.vaadin.ui.declarative.Design;
/**
* Declarative test UI. Provides simple instantiation of HTML designs located
* under {@code uitest/src}. Also provides {@link OnLoad} annotation that lets
* you easily hook up methods to run after the UI has been created. Note: you
* <i>must</i> add the {@link DeclarativeUI} annotation to your subclass; not
* doing this will result in program failure.
*/
@SuppressWarnings("serial")
public class DeclarativeTestUI extends AbstractTestUI {
private Logger logger;
private Component component;
/**
* Class marker indicating the design .html file to load
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public static @interface DeclarativeUI {
String value();
/**
* Set this property to true if you provide an absolute path to your
* design; otherwise, the DeclarativeTestUI logic will look for the HTML
* design file under {@code vaadin_project/uitest/src/<package path>/}.
*/
boolean absolutePath() default false;
}
/**
* Method marker interface indicating that a method should be run after the
* declarative UI has been created
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public static @interface OnLoad {
}
/**
* Figure out the proper path for the HTML design file
*/
private String getDesignPath() {
Class<?> clazz = getClass();
String designFilePath = null;
if (clazz.getAnnotation(DeclarativeUI.class).absolutePath()) {
designFilePath = "";
} else {
// This is rather nasty.. but it works well enough for now.
String userDir = System.getProperty("user.dir");
designFilePath = userDir + "/uitest/src/"
+ clazz.getPackage().getName().replace('.', '/') + "/";
}
String designFileName = clazz.getAnnotation(DeclarativeUI.class)
.value();
return designFilePath + designFileName;
}
private Component readDesign() throws Exception {
String path = getDesignPath();
getLogger().log(Level.INFO, "Reading design from " + path);
File file = new File(path);
return Design.read(new FileInputStream(file));
}
@Override
protected void setup(VaadinRequest request) {
Class<?> clazz = getClass();
if (clazz.isAnnotationPresent(DeclarativeUI.class)) {
// Create component
try {
component = readDesign();
} catch (Exception e1) {
getLogger().log(Level.SEVERE, "Error reading design", e1);
return;
}
addComponent(component);
// Call on-load methods (if applicable)
Method[] methods = clazz.getMethods();
for (Method m : methods) {
if (m.isAnnotationPresent(OnLoad.class)) {
try {
m.invoke(this, (Object[]) null);
} catch (IllegalAccessException e) {
getLogger().log(Level.SEVERE,
"Error invoking @OnLoad method", e);
return;
} catch (IllegalArgumentException e) {
getLogger().log(Level.SEVERE,
"Error invoking @OnLoad method", e);
return;
} catch (InvocationTargetException e) {
getLogger().log(Level.SEVERE,
"Error invoking @OnLoad method", e);
return;
}
}
}
} else {
throw new IllegalStateException(
"Cannot find declarative UI annotation");
}
}
/**
* Get access to the declaratively created component. This method typecasts
* the component to the receiving type; if there's a mismatch between what
* you expect and what's written in the design, this will fail with a
* ClassCastException.
*
* @return a Vaadin component
*/
@SuppressWarnings("unchecked")
public <T extends Component> T getComponent() {
try {
return (T) component;
} catch (ClassCastException ex) {
getLogger().log(Level.SEVERE, "Component code/design type mismatch",
ex);
}
return null;
}
/**
* Get access to the logger of this class
*
* @return a Logger instance
*/
protected Logger getLogger() {
if (logger == null) {
logger = Logger.getLogger(getClass().getName());
}
return logger;
}
}
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