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package com.sun.jersey.server.impl.application;
import java.util.Collections;
import java.util.Set;
import java.util.logging.Logger;
import javax.ws.rs.core.Application;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.DefaultResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.core.spi.component.ComponentProvider;
import com.sun.jersey.core.spi.component.ProviderFactory;
/**
* @author Paul Sandoz (paul.sandoz at oracle.com)
* @author Michal Gajdos (michal.gajdos at oracle.com)
*/
public class DeferredResourceConfig extends DefaultResourceConfig {
private static final Logger LOGGER = Logger.getLogger(DeferredResourceConfig.class.getName());
private final Class<? extends Application> appClass;
private final Set<Class<?>> defaultClasses;
public DeferredResourceConfig(Class<? extends Application> appClass) {
this(appClass, Collections.<Class<?>>emptySet());
}
public DeferredResourceConfig(Class<? extends Application> appClass, Set<Class<?>> defaultClasses) {
this.appClass = appClass;
this.defaultClasses = defaultClasses;
}
public ApplicationHolder getApplication(ProviderFactory pf) {
return new ApplicationHolder(pf);
}
public class ApplicationHolder {
private final Application originalApp;
private final DefaultResourceConfig adaptedApp;
private ApplicationHolder(ProviderFactory pf) {
final ComponentProvider cp = pf.getComponentProvider(appClass);
if (cp == null) {
throw new ContainerException("The Application class " + appClass.getName() + " could not be instantiated");
}
this.originalApp = (Application) cp.getInstance();
if ((originalApp.getClasses() == null || originalApp.getClasses().isEmpty())
&& (originalApp.getSingletons() == null || originalApp.getSingletons().isEmpty())) {
LOGGER.info("Instantiated the Application class " + appClass.getName() +
". The following root resource and provider classes are registered: " + defaultClasses);
this.adaptedApp = new DefaultResourceConfig(defaultClasses);
adaptedApp.add(originalApp);
} else {
LOGGER.info("Instantiated the Application class " + appClass.getName());
adaptedApp = null;
}
if (originalApp instanceof ResourceConfig) {
final ResourceConfig rc = (ResourceConfig)originalApp;
getFeatures().putAll(rc.getFeatures());
getProperties().putAll(rc.getProperties());
getExplicitRootResources().putAll(rc.getExplicitRootResources());
getMediaTypeMappings().putAll(rc.getMediaTypeMappings());
getLanguageMappings().putAll(rc.getLanguageMappings());
}
}
public Application getOriginalApplication() {
return originalApp;
}
public Application getApplication() {
return (adaptedApp != null) ? adaptedApp : originalApp;
}
}
}