com.googlecode.gwt.test.guice.GwtGuiceHelper Maven / Gradle / Ivy
package com.googlecode.gwt.test.guice;
import com.google.gwt.core.client.GWT;
import com.google.inject.Injector;
import com.google.inject.servlet.GuiceServletContextListener;
import com.google.inject.servlet.ServletDefinitionReader;
import com.googlecode.gwt.test.exceptions.GwtTestConfigurationException;
import com.googlecode.gwt.test.internal.utils.WebXmlUtils;
import com.googlecode.gwt.test.utils.GwtReflectionUtils;
/**
* Helper for gwt-test-utils / Guice integration. For internal use only.
*
* @author Alex Dobjanschi
* @author Gael Lazzari
*/
class GwtGuiceHelper {
private static final GwtGuiceHelper INSTANCE = new GwtGuiceHelper();
private boolean hasSearchedInjector = false;
private Injector injector;
private ServletDefinitionReader servletDefinitionReader;
private GwtGuiceHelper() {
}
public static GwtGuiceHelper get() {
return INSTANCE;
}
public Injector getInjector() {
if (this.injector == null && !hasSearchedInjector) {
for (String listenerClassName : WebXmlUtils.get().getListenerClasses()) {
try {
Class clazz = GwtReflectionUtils.getClass(listenerClassName);
if (GuiceServletContextListener.class.isAssignableFrom(clazz)) {
Object instance = GwtReflectionUtils.instantiateClass(clazz);
this.injector = GwtReflectionUtils.callPrivateMethod(instance, "getInjector");
}
} catch (Exception e) {
throw new GwtTestConfigurationException(
"Error while parsing web.xml searching for a Guice Injector in a configured GuiceServletContextListener",
e);
}
}
hasSearchedInjector = true;
}
// can be null
return this.injector;
}
public Object getRpcServiceFromInjector(Injector injector, Class remoteServiceClass,
String remoteServiceRelativePath) {
if (servletDefinitionReader == null) {
servletDefinitionReader = new ServletDefinitionReader(injector);
}
// Try from Guice injection.
String moduleName = GWT.getModuleName();
return servletDefinitionReader.getServletForPath("/" + moduleName + "/" + remoteServiceRelativePath);
}
}