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//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// 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;
}
}
