package org.jboss.resteasy.client.jaxrs.internal.proxy;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.SecureClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.NoSuchElementException;
import java.util.Set;
import javax.ws.rs.Path;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import org.jboss.resteasy.client.jaxrs.ProxyBuilder;
import org.jboss.resteasy.client.jaxrs.ProxyConfig;
import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;
import org.jboss.resteasy.client.jaxrs.i18n.Messages;
import org.jboss.resteasy.util.IsHttpMethod;
public class ProxyBuilderImpl<T> extends ProxyBuilder<T>
{
private static final Class<?>[] cClassArgArray = {Class.class};
private final Class<T> iface;
private final WebTarget webTarget;
private ClassLoader loader;
private MediaType serverConsumes;
private MediaType serverProduces;
private static <T> ClientInvoker createClientInvoker(Class<T> clazz, Method method, ResteasyWebTarget base,
ProxyConfig config)
{
Set<String> httpMethods = IsHttpMethod.getHttpMethods(method);
if (httpMethods == null || httpMethods.size() != 1)
{
throw new RuntimeException(Messages.MESSAGES.mustUseExactlyOneHttpMethod(method.toString()));
}
ClientInvoker invoker = new ClientInvoker(base, clazz, method, config);
invoker.setHttpMethod(httpMethods.iterator().next());
return invoker;
}
public ProxyBuilderImpl(final Class<T> iface, final WebTarget webTarget)
{
if (System.getSecurityManager() == null)
{
this.loader = Thread.currentThread().getContextClassLoader();
}
else
{
this.loader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>()
{
@Override
public ClassLoader run()
{
return Thread.currentThread().getContextClassLoader();
}
});
}
this.iface = iface;
this.webTarget = webTarget;
}
public ProxyBuilderImpl<T> classloader(ClassLoader cl)
{
this.loader = cl;
return this;
}
public ProxyBuilderImpl<T> defaultProduces(MediaType type)
{
this.serverProduces = type;
return this;
}
public ProxyBuilderImpl<T> defaultConsumes(MediaType type)
{
this.serverConsumes = type;
return this;
}
public ProxyBuilderImpl<T> defaultProduces(String type)
{
this.serverProduces = MediaType.valueOf(type);
return this;
}
public ProxyBuilderImpl<T> defaultConsumes(String type)
{
this.serverConsumes = MediaType.valueOf(type);
return this;
}
public T build()
{
return build(new ProxyConfig(loader, serverConsumes, serverProduces));
}
@SuppressWarnings("unchecked")
public T build(final ProxyConfig config)
{
WebTarget base = webTarget;
if (iface.isAnnotationPresent(Path.class))
{
Path path = iface.getAnnotation(Path.class);
if (!path.value().equals("") && !path.value().equals("/"))
{
base = base.path(path.value());
}
}
HashMap<Method, MethodInvoker> methodMap = new HashMap<Method, MethodInvoker>();
for (Method method : iface.getMethods())
{
if ("as".equals(method.getName()) && Arrays.equals(method.getParameterTypes(), cClassArgArray))
{
continue;
}
MethodInvoker invoker;
Set<String> httpMethods = IsHttpMethod.getHttpMethods(method);
if ((httpMethods == null || httpMethods.size() == 0) && method.isAnnotationPresent(Path.class)
&& method.getReturnType().isInterface())
{
invoker = new SubResourceInvoker((ResteasyWebTarget) base, method, config);
}
else if (httpMethods == null)
{
continue;
}
else if (base instanceof ClientInvokerFactory)
{
invoker = ((ClientInvokerFactory) base).createClientInvoker(iface, method, config);
}
else
{
invoker = createClientInvoker(iface, method, (ResteasyWebTarget) base, config);
}
methodMap.put(method, invoker);
}
Class<?>[] intfs = {iface, ResteasyClientProxy.class};
ClientProxy clientProxy = new ClientProxy(methodMap, base, config);
clientProxy.setClazz(iface);
ClassLoader cl = config.getLoader();
try {
cl.loadClass(iface.getName());
} catch (Throwable t) {
cl = new DelegateClassLoader(iface.getClassLoader(), cl);
}
return (T) Proxy.newProxyInstance(cl, intfs, clientProxy);
}
public class DelegateClassLoader extends SecureClassLoader
{
private final ClassLoader delegate;
private final ClassLoader parent;
public DelegateClassLoader(final ClassLoader delegate, final ClassLoader parent)
{
super(parent);
this.delegate = delegate;
this.parent = parent;
}
@Override
public Class<?> loadClass(final String className) throws ClassNotFoundException
{
if (parent != null)
{
try
{
return parent.loadClass(className);
}
catch (ClassNotFoundException cnfe)
{
}
}
return delegate.loadClass(className);
}
@Override
public URL getResource(final String name)
{
URL url = null;
if (parent != null)
{
url = parent.getResource(name);
}
return (url == null) ? delegate.getResource(name) : url;
}
@Override
public Enumeration<URL> getResources(final String name) throws IOException
{
final ArrayList<Enumeration<URL>> foundResources = new ArrayList<Enumeration<URL>>();
foundResources.add(delegate.getResources(name));
if (parent != null)
{
foundResources.add(parent.getResources(name));
}
return new Enumeration<URL>()
{
private int position = foundResources.size() - 1;
public boolean hasMoreElements()
{
while (position >= 0)
{
if (foundResources.get(position).hasMoreElements())
{
return true;
}
position--;
}
return false;
}
public URL nextElement()
{
while (position >= 0)
{
try
{
return (foundResources.get(position)).nextElement();
}
catch (NoSuchElementException e)
{
}
position--;
}
throw new NoSuchElementException();
}
};
}
@Override
public InputStream getResourceAsStream(final String name)
{
InputStream is = null;
if (parent != null)
{
is = parent.getResourceAsStream(name);
}
return (is == null) ? delegate.getResourceAsStream(name) : is;
}
}
}