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package com.sun.jersey.server.impl.model.method.dispatch;
import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.model.AbstractResourceMethod;
import com.sun.jersey.core.spi.factory.ResponseBuilderImpl;
import com.sun.jersey.server.impl.inject.InjectableValuesProvider;
import com.sun.jersey.server.impl.inject.ServerInjectableProviderContext;
import com.sun.jersey.spi.dispatch.RequestDispatcher;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Type;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.GenericEntity;
import javax.ws.rs.core.Response;
/**
* A partial implementation of {@link ResourceMethodDispatchProvider} that
* creates instances of {@link RequestDispatcher}.
*
* Implementing classes are required to override the
* {@link #getInjectableValuesProvider(com.sun.jersey.api.model.AbstractResourceMethod) }
* method to return a {@link InjectableValuesProvider} associated with the parameters
* of the abstract resource method.
*
* @author [email protected]
*/
public abstract class AbstractResourceMethodDispatchProvider implements ResourceMethodDispatchProvider {
public RequestDispatcher create(AbstractResourceMethod abstractResourceMethod) {
InjectableValuesProvider pp = getInjectableValuesProvider(abstractResourceMethod);
if (pp == null)
return null;
Class returnType = abstractResourceMethod.getReturnType();
if (Response.class.isAssignableFrom(returnType)) {
return new ResponseOutInvoker(abstractResourceMethod, pp);
} else if (returnType != void.class) {
if (returnType == Object.class || GenericEntity.class.isAssignableFrom(returnType)) {
return new ObjectOutInvoker(abstractResourceMethod, pp);
} else {
return new TypeOutInvoker(abstractResourceMethod, pp);
}
} else {
return new VoidOutInvoker(abstractResourceMethod, pp);
}
}
private @Context ServerInjectableProviderContext sipc;
/**
* Get the server-specific injectable provider context.
*
* @return the server-specific injectable provider context
*/
protected ServerInjectableProviderContext getInjectableProviderContext() {
return sipc;
}
/**
* Get the injectable values provider for an abstract resource method.
*
* @param abstractResourceMethod the abstract resource method.
* @return the injectable values provider, or null if no injectable values
* can be created for the parameters of the abstract
* resource method.
*/
protected abstract InjectableValuesProvider getInjectableValuesProvider(
AbstractResourceMethod abstractResourceMethod);
private static abstract class EntityParamInInvoker extends ResourceJavaMethodDispatcher {
private final InjectableValuesProvider pp;
EntityParamInInvoker(AbstractResourceMethod abstractResourceMethod,
InjectableValuesProvider pp) {
super(abstractResourceMethod);
this.pp = pp;
}
final Object[] getParams(HttpContext context) {
return pp.getInjectableValues(context);
}
}
private static final class VoidOutInvoker extends EntityParamInInvoker {
VoidOutInvoker(AbstractResourceMethod abstractResourceMethod,
InjectableValuesProvider pp) {
super(abstractResourceMethod, pp);
}
public void _dispatch(Object resource, HttpContext context)
throws IllegalAccessException, InvocationTargetException {
final Object[] params = getParams(context);
method.invoke(resource, params);
}
}
private static final class TypeOutInvoker extends EntityParamInInvoker {
private final Type t;
TypeOutInvoker(AbstractResourceMethod abstractResourceMethod,
InjectableValuesProvider pp) {
super(abstractResourceMethod, pp);
this.t = abstractResourceMethod.getGenericReturnType();
}
public void _dispatch(Object resource, HttpContext context)
throws IllegalAccessException, InvocationTargetException {
final Object[] params = getParams(context);
Object o = method.invoke(resource, params);
if (o != null) {
Response r = new ResponseBuilderImpl().
entityWithType(o, t).status(200).build();
context.getResponse().setResponse(r);
}
}
}
private static final class ResponseOutInvoker extends EntityParamInInvoker {
ResponseOutInvoker(AbstractResourceMethod abstractResourceMethod,
InjectableValuesProvider pp) {
super(abstractResourceMethod, pp);
}
public void _dispatch(Object resource, HttpContext context)
throws IllegalAccessException, InvocationTargetException {
final Object[] params = getParams(context);
Response r = (Response)method.invoke(resource, params);
if (r != null) {
context.getResponse().setResponse(r);
}
}
}
private static final class ObjectOutInvoker extends EntityParamInInvoker {
ObjectOutInvoker(AbstractResourceMethod abstractResourceMethod,
InjectableValuesProvider pp) {
super(abstractResourceMethod, pp);
}
public void _dispatch(Object resource, HttpContext context)
throws IllegalAccessException, InvocationTargetException {
final Object[] params = getParams(context);
Object o = method.invoke(resource, params);
if (o instanceof Response) {
Response r = (Response)o;
context.getResponse().setResponse(r);
} else if (o != null) {
Response r = new ResponseBuilderImpl().status(200).entity(o).build();
context.getResponse().setResponse(r);
}
}
}
}