| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 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.annotated; |
| |
| import java.io.InputStream; |
| import java.io.Reader; |
| import java.lang.reflect.InvocationTargetException; |
| 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.WebSocketException; |
| import org.eclipse.jetty.websocket.api.util.QuoteUtil; |
| |
| public class EventMethod |
| { |
| private static final Logger LOG = Log.getLogger(EventMethod.class); |
| |
| private static Object[] dropFirstArg(Object[] args) |
| { |
| if (args.length == 1) |
| { |
| return new Object[0]; |
| } |
| Object ret[] = new Object[args.length - 1]; |
| System.arraycopy(args,1,ret,0,ret.length); |
| return ret; |
| } |
| |
| protected Class<?> pojo; |
| protected Method method; |
| private boolean hasSession = false; |
| private boolean isStreaming = false; |
| private Class<?>[] paramTypes; |
| |
| public EventMethod(Class<?> pojo, Method method) |
| { |
| this.pojo = pojo; |
| this.paramTypes = method.getParameterTypes(); |
| this.method = method; |
| identifyPresentParamTypes(); |
| } |
| |
| public EventMethod(Class<?> pojo, String methodName, Class<?>... paramTypes) |
| { |
| try |
| { |
| this.pojo = pojo; |
| this.paramTypes = paramTypes; |
| this.method = pojo.getMethod(methodName,paramTypes); |
| identifyPresentParamTypes(); |
| } |
| catch (NoSuchMethodException | SecurityException e) |
| { |
| LOG.warn("Cannot use method {}({}): {}",methodName,paramTypes,e.getMessage()); |
| this.method = null; |
| } |
| } |
| |
| public void call(Object obj, Object... args) |
| { |
| if ((this.pojo == null) || (this.method == null)) |
| { |
| LOG.warn("Cannot execute call: pojo={}, method={}",pojo,method); |
| return; // no call event method determined |
| } |
| if (obj == null) |
| { |
| LOG.warn("Cannot call {} on null object",this.method); |
| return; |
| } |
| if (args.length > paramTypes.length) |
| { |
| Object trimArgs[] = dropFirstArg(args); |
| call(obj,trimArgs); |
| return; |
| } |
| if (args.length < paramTypes.length) |
| { |
| throw new IllegalArgumentException("Call arguments length [" + args.length + "] must always be greater than or equal to captured args length [" |
| + paramTypes.length + "]"); |
| } |
| |
| try |
| { |
| this.method.invoke(obj,args); |
| } |
| catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) |
| { |
| String err = String.format("Cannot call method %s on %s with args: %s",method,pojo, QuoteUtil.join(args,",")); |
| throw new WebSocketException(err,e); |
| } |
| } |
| |
| public Method getMethod() |
| { |
| return method; |
| } |
| |
| protected Class<?>[] getParamTypes() |
| { |
| return this.paramTypes; |
| } |
| |
| private void identifyPresentParamTypes() |
| { |
| this.hasSession = false; |
| this.isStreaming = false; |
| |
| if (paramTypes == null) |
| { |
| return; |
| } |
| |
| for (Class<?> paramType : paramTypes) |
| { |
| if (Session.class.isAssignableFrom(paramType)) |
| { |
| this.hasSession = true; |
| } |
| if (Reader.class.isAssignableFrom(paramType) || InputStream.class.isAssignableFrom(paramType)) |
| { |
| this.isStreaming = true; |
| } |
| } |
| } |
| |
| public boolean isHasSession() |
| { |
| return hasSession; |
| } |
| |
| public boolean isStreaming() |
| { |
| return isStreaming; |
| } |
| } |