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package com.sun.jersey.api.container;
import com.sun.jersey.api.core.DefaultResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.api.core.ClasspathResourceConfig;
import com.sun.jersey.core.spi.component.ioc.IoCComponentProviderFactory;
import com.sun.jersey.spi.container.ContainerProvider;
import com.sun.jersey.spi.container.ContainerListener;
import com.sun.jersey.spi.container.ContainerNotifier;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.WebApplicationFactory;
import com.sun.jersey.spi.service.ServiceFinder;
import java.io.File;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
/**
* Factory for creating specific HTTP-based containers.
*
* @author Paul.Sandoz@Sun.Com
*/
public final class ContainerFactory {
private ContainerFactory() {
}
/**
* Create a container according to the class requested.
* <p>
* The list of service-provider supporting the {@link ContainerProvider}
* service-provider will be iterated over until one returns a non-null
* container instance.
* <p>
* @param <A> the type of the container.
* @param type the type of the container.
* @param resourceClasses the list of Web resources to be managed by the
* Web application.
* @return the container.
* @throws ContainerException if there is an error creating the container.
* @throws IllegalArgumentException if no container provider supports the type.
*/
@SuppressWarnings("unchecked")
public static <A> A createContainer(Class<A> type, Class<?>... resourceClasses)
throws ContainerException, IllegalArgumentException {
Set<Class<?>> resourceClassesSet = new HashSet<Class<?>>(
Arrays.asList(resourceClasses));
return createContainer(type, new DefaultResourceConfig(resourceClassesSet),
null);
}
/**
* Create a container according to the class requested.
* <p>
* The list of service-provider supporting the {@link ContainerProvider}
* service-provider will be iterated over until one returns a non-null
* container instance.
* <p>
* @param <A> the type of the container.
* @param type the type of the container.
* @param resourceClasses the set of Web resources to be managed by the
* Web application.
* @return the container.
* @throws ContainerException if there is an error creating the container.
* @throws IllegalArgumentException if no container provider supports the type.
*/
@SuppressWarnings("unchecked")
public static <A> A createContainer(Class<A> type, Set<Class<?>> resourceClasses)
throws ContainerException, IllegalArgumentException {
return createContainer(type, new DefaultResourceConfig(resourceClasses),
null);
}
/**
* Create a container according to the class requested.
* <p>
* The list of service-provider supporting the {@link ContainerProvider}
* service-provider will be iterated over until one returns a non-null
* container instance.
* <p>
* @param <A> the type of the container.
* @param type the type of the container.
* @param resourceConfig the resource configuration containing the set
* of Web resources to be managed by the Web application.
* @return the container.
* @throws ContainerException if there is an error creating the container.
* @throws IllegalArgumentException if no container provider supports the type.
*/
public static <A> A createContainer(Class<A> type, ResourceConfig resourceConfig)
throws ContainerException, IllegalArgumentException {
return createContainer(type, resourceConfig, null);
}
/**
* Create a container according to the class requested.
* <p>
* The list of service-provider supporting the {@link ContainerProvider}
* service-provider will be iterated over until one returns a non-null
* container instance.
* <p>
* @param <A> the type of the container.
* @param type the type of the container.
* @param resourceConfig the resource configuration containing the set
* of Web resources to be managed by the Web application.
* @param factory the IoC component provider factory the web application
* delegates to for obtaining instances of resource and provider
* classes. May be null if the web application is responsible for
* instantiating resource and provider classes.
* @return the container.
* @throws ContainerException if there is an error creating the container.
* @throws IllegalArgumentException if no container provider supports the type.
*/
@SuppressWarnings("unchecked")
public static <A> A createContainer(Class<A> type, ResourceConfig resourceConfig,
IoCComponentProviderFactory factory)
throws ContainerException, IllegalArgumentException {
WebApplication wa = WebApplicationFactory.createWebApplication();
// Reverse the order so that applications may override
LinkedList<ContainerProvider> cps = new LinkedList<ContainerProvider>();
for (ContainerProvider cp : ServiceFinder.find(ContainerProvider.class, true))
cps.addFirst(cp);
for (ContainerProvider<A> cp : cps) {
A c = cp.createContainer(type, resourceConfig, wa);
if (c != null) {
// Initiate the web application
if (!wa.isInitiated()) {
wa.initiate(resourceConfig, factory);
}
// Register a container listener
Object o = resourceConfig.getProperties().get(
ResourceConfig.PROPERTY_CONTAINER_NOTIFIER);
if (o instanceof List) {
List list = (List) o;
for (Object elem : list) {
if (elem instanceof ContainerNotifier &&
c instanceof ContainerListener) {
ContainerNotifier crf = (ContainerNotifier) elem;
crf.addListener((ContainerListener) c);
}
}
} else if (o instanceof ContainerNotifier &&
c instanceof ContainerListener) {
ContainerNotifier crf = (ContainerNotifier) o;
crf.addListener((ContainerListener) c);
}
return c;
}
}
throw new IllegalArgumentException("No container provider supports the type " + type);
}
/**
* Create an instance of a container according to the class requested.
*
* @param <A> the type of the container.
* @param type the type of the container.
* @param packageName the name of the package where to find the resource configuration
* class.
* @return the HTTP handler, if a handler could not be created then null is
* returned.
* @throws ContainerException if the resource configuration class could not
* be found and instantiated or there is an error creating the container.
* @throws IllegalArgumentException if no container provider supports the type.
* @deprecated
*/
@Deprecated
@SuppressWarnings("unchecked")
public static <A> A createContainer(Class<A> type, String packageName)
throws ContainerException, IllegalArgumentException {
String resourcesClassName = packageName + ".WebResources";
try {
Class<?> resourcesClass = ContainerFactory.class.getClassLoader().loadClass(resourcesClassName);
ResourceConfig config = (ResourceConfig) resourcesClass.newInstance();
return createContainer(type, config, null);
} catch (ClassNotFoundException e) {
throw new ContainerException(e);
} catch (InstantiationException e) {
throw new ContainerException(e);
} catch (IllegalAccessException e) {
throw new ContainerException(e);
}
}
/**
* Create an instance of a container according to the class requested.
* <p>
* All java classpath will be scanned for Root Resource Classes.
* </p>
* @param <A> the type of the container.
* @param type the type of the container.
*
* @return the HTTP handler, if a handler could not be created then null is
* returned.
* @throws IllegalArgumentException if no container provider supports the type.
*/
public static <A> A createContainer(Class<A> type) {
String classPath = System.getProperty("java.class.path");
String[] paths = classPath.split(File.pathSeparator);
return createContainer(type, paths);
}
/**
* Create an instance of a container according to the class requested.
* <p>
* Root Resource Classes will be scanned in paths.
* </p>
* @param <A> the type of the container.
* @param type the type of the container.
* @param paths a list of paths to be scanned for resource classes.
*
* @return the HTTP handler, if a handler could not be created then null is
* returned.
* @throws IllegalArgumentException if no container provider supports the type.
*/
public static <A> A createContainer(Class<A> type, String... paths) {
ClasspathResourceConfig config = new ClasspathResourceConfig(paths);
return createContainer(type, config, null);
}
}