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package org.atmosphere.jersey;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.spi.inject.Injectable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResourceEvent;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.Context;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Proxy;
import java.lang.reflect.Type;
/**
* Allow {@link AtmosphereResourceEvent} injection via the {@link Context} annotation supported
* by Jersey.
*
* @author Jeanfrancois Arcand
* @author Paul Sandoz
*/
abstract class AtmosphereResourceInjector extends BaseInjectableProvider {
boolean isValidType(Type c) {
if (c == AtmosphereResource.class) return true;
if (c instanceof ParameterizedType){
ParameterizedType pt = (ParameterizedType) c;
if (pt.getRawType() != AtmosphereResource.class) return false;
if (pt.getActualTypeArguments().length != 2) return false;
if (pt.getActualTypeArguments()[0] != HttpServletRequest.class) return false;
if (pt.getActualTypeArguments()[1] != HttpServletResponse.class) return false;
return true;
}
return false;
}
public static final class PerRequest extends AtmosphereResourceInjector {
@Override
public ComponentScope getScope() {
return ComponentScope.PerRequest;
}
@Override
public Injectable<AtmosphereResource> getInjectable(ComponentContext ic, Context a, Type c) {
if (!isValidType(c))
return null;
return new Injectable<AtmosphereResource>() {
@Override
public AtmosphereResource getValue() {
return getAtmosphereResource(AtmosphereResource.class, false);
}
};
}
}
public static final class Singleton extends AtmosphereResourceInjector {
@Override
public ComponentScope getScope() {
return ComponentScope.Singleton;
}
@Override
public Injectable<AtmosphereResource> getInjectable(ComponentContext ic, Context a, Type c) {
if (!isValidType(c))
return null;
return new Injectable<AtmosphereResource>() {
@Override
public AtmosphereResource getValue() {
return (AtmosphereResource)Proxy.newProxyInstance(this.getClass().getClassLoader(),
new Class[] { AtmosphereResource.class }, new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
return method.invoke(getAtmosphereResource(AtmosphereResource.class, false), args);
}
});
}
};
}
}
}