package com.googlecode.gwt.test.gxt3.internal.handlers;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import com.googlecode.gwt.test.GwtCreateHandler;
import com.googlecode.gwt.test.exceptions.GwtTestException;
import com.googlecode.gwt.test.internal.GwtConfig;
import com.googlecode.gwt.test.utils.JavassistUtils;
import com.sencha.gxt.core.client.BindingPropertySet;
import com.sencha.gxt.core.client.BindingPropertySet.PropertyName;
import com.sencha.gxt.core.client.BindingPropertySet.PropertyValue;
/**
* Custom {@link GwtCreateHandler} implementation for {@link BindingPropertySet}
* subtype instanciation.<strong>For internal use only.</strong>
*
* @author Gael Lazzari
*
*/
public class BindingPropertySetCreateHandler implements GwtCreateHandler {
private static final class BindingPropertySetInvocationHandler implements
InvocationHandler {
private final String propertyName;
private final Class<?> proxiedClass;
private BindingPropertySetInvocationHandler(Class<?> proxiedClass) {
this.proxiedClass = proxiedClass;
this.propertyName = JavassistUtils.getInvisibleAnnotationStringValue(
proxiedClass, PropertyName.class, "value");
if (propertyName == null) {
throw new GwtTestException(proxiedClass.getName()
+ " must be annotated with @" + PropertyName.class.getSimpleName());
}
}
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
String propertyValue = JavassistUtils.getInvisibleAnnotationStringValue(
method, PropertyValue.class, "value");
if (propertyValue == null) {
throw new GwtTestException(method.toString()
+ " must be annotated with @" + PropertyValue.class.getSimpleName());
}
if (method.getReturnType() != Boolean.TYPE
&& method.getReturnType() != Boolean.class) {
throw new GwtTestException(proxiedClass.getName()
+ " must return a boolean");
}
return propertyValue.equals(GwtConfig.get().getModuleRunner().getClientProperty(
propertyName));
}
}
/*
* (non-Javadoc)
*
* @see com.googlecode.gwt.test.GwtCreateHandler#create(java.lang.Class)
*/
public Object create(Class<?> classLiteral) throws Exception {
if (!BindingPropertySet.class.isAssignableFrom(classLiteral)) {
return null;
}
InvocationHandler ih = new BindingPropertySetInvocationHandler(classLiteral);
return Proxy.newProxyInstance(classLiteral.getClassLoader(),
new Class<?>[]{classLiteral}, ih);
}
}