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//
// ========================================================================
// Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.common.events;
import java.io.InputStream;
import java.io.Reader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketClose;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketError;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketFrame;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
import org.eclipse.jetty.websocket.api.extensions.Frame;
import org.eclipse.jetty.websocket.common.events.annotated.AbstractMethodAnnotationScanner;
import org.eclipse.jetty.websocket.common.events.annotated.CallableMethod;
import org.eclipse.jetty.websocket.common.events.annotated.InvalidSignatureException;
import org.eclipse.jetty.websocket.common.events.annotated.OptionalSessionCallableMethod;
public class JettyAnnotatedScanner extends AbstractMethodAnnotationScanner
{
private static final Logger LOG = Log.getLogger(JettyAnnotatedScanner.class);
/**
* Parameter list for @OnWebSocketMessage (Binary mode)
*/
private static final ParamList validBinaryParams;
/**
* Parameter list for @OnWebSocketConnect
*/
private static final ParamList validConnectParams;
/**
* Parameter list for @OnWebSocketClose
*/
private static final ParamList validCloseParams;
/**
* Parameter list for @OnWebSocketError
*/
private static final ParamList validErrorParams;
/**
* Parameter list for @OnWebSocketFrame
*/
private static final ParamList validFrameParams;
/**
* Parameter list for @OnWebSocketMessage (Text mode)
*/
private static final ParamList validTextParams;
static
{
validConnectParams = new ParamList();
validConnectParams.addParams(Session.class);
validCloseParams = new ParamList();
validCloseParams.addParams(int.class,String.class);
validCloseParams.addParams(Session.class,int.class,String.class);
validErrorParams = new ParamList();
validErrorParams.addParams(Throwable.class);
validErrorParams.addParams(Session.class,Throwable.class);
validTextParams = new ParamList();
validTextParams.addParams(String.class);
validTextParams.addParams(Session.class,String.class);
validTextParams.addParams(Reader.class);
validTextParams.addParams(Session.class,Reader.class);
validBinaryParams = new ParamList();
validBinaryParams.addParams(byte[].class,int.class,int.class);
validBinaryParams.addParams(Session.class,byte[].class,int.class,int.class);
validBinaryParams.addParams(InputStream.class);
validBinaryParams.addParams(Session.class,InputStream.class);
validFrameParams = new ParamList();
validFrameParams.addParams(Frame.class);
validFrameParams.addParams(Session.class,Frame.class);
}
@Override
public void onMethodAnnotation(JettyAnnotatedMetadata metadata, Class pojo, Method method, Annotation annotation)
{
if (LOG.isDebugEnabled())
LOG.debug("onMethodAnnotation({}, {}, {}, {})",metadata,pojo,method,annotation);
if (isAnnotation(annotation,OnWebSocketConnect.class))
{
assertValidSignature(method,OnWebSocketConnect.class,validConnectParams);
assertUnset(metadata.onConnect,OnWebSocketConnect.class,method);
metadata.onConnect = new CallableMethod(pojo,method);
return;
}
if (isAnnotation(annotation,OnWebSocketMessage.class))
{
if (isSignatureMatch(method,validTextParams))
{
// Text mode
assertUnset(metadata.onText,OnWebSocketMessage.class,method);
metadata.onText = new OptionalSessionCallableMethod(pojo,method);
return;
}
if (isSignatureMatch(method,validBinaryParams))
{
// Binary Mode
// TODO
assertUnset(metadata.onBinary,OnWebSocketMessage.class,method);
metadata.onBinary = new OptionalSessionCallableMethod(pojo,method);
return;
}
throw InvalidSignatureException.build(method,OnWebSocketMessage.class,validTextParams,validBinaryParams);
}
if (isAnnotation(annotation,OnWebSocketClose.class))
{
assertValidSignature(method,OnWebSocketClose.class,validCloseParams);
assertUnset(metadata.onClose,OnWebSocketClose.class,method);
metadata.onClose = new OptionalSessionCallableMethod(pojo,method);
return;
}
if (isAnnotation(annotation,OnWebSocketError.class))
{
assertValidSignature(method,OnWebSocketError.class,validErrorParams);
assertUnset(metadata.onError,OnWebSocketError.class,method);
metadata.onError = new OptionalSessionCallableMethod(pojo,method);
return;
}
if (isAnnotation(annotation,OnWebSocketFrame.class))
{
assertValidSignature(method,OnWebSocketFrame.class,validFrameParams);
assertUnset(metadata.onFrame,OnWebSocketFrame.class,method);
metadata.onFrame = new OptionalSessionCallableMethod(pojo,method);
return;
}
}
public JettyAnnotatedMetadata scan(Class pojo)
{
JettyAnnotatedMetadata metadata = new JettyAnnotatedMetadata();
scanMethodAnnotations(metadata,pojo);
return metadata;
}
}
