/**
    * Copyright (C) 2010 Daniel Manzke <daniel.manzke@googlemail.com>
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.onami.autobind.aop;
  
  import java.lang.reflect.Method;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import javax.interceptor.Interceptor;
  
  import org.aopalliance.intercept.MethodInvocation;
  
  import com.google.inject.matcher.Matcher;
  import com.google.inject.matcher.Matchers;
  
  /**
   * Interceptor Example which monitors all Methods and logs their Signatures.
   * 
   * @author Daniel Manzke
   * 
   */
  @Interceptor
  public class MethodCallingInterceptor {
  	private Logger _logger = Logger.getLogger(MethodCallingInterceptor.class.getName());
  
  	@Invoke
  	public Object invoke(MethodInvocation invocation) throws Throwable {
  		Object destination = invocation.getThis();
  		StringBuilder logMessageBuilder = new StringBuilder(250);
  
  		logMessageBuilder.append("Invoking Method \"");
  		logMessageBuilder.append(invocation.getMethod().getName());
  		logMessageBuilder.append("\" on ");
  		logMessageBuilder.append(destination.getClass().getName());
  		logMessageBuilder.append(" with Arguments: ");
  
  		Class<?>[] types = invocation.getMethod().getParameterTypes();
  		Object[] parameters = invocation.getArguments();
  
  		for (int i = 0; i < types.length; i++) {
  			Object parameter = parameters[i];
  			Class<?> type = types[i];
  
  			logMessageBuilder.append(" \"");
  			logMessageBuilder.append(type.getSimpleName());
  			logMessageBuilder.append("\": ");
  			logMessageBuilder.append(parameter);
  		}
  		_logger.log(Level.SEVERE, logMessageBuilder.toString());
  
  		return invocation.proceed();
  	}
  
  	@ClassMatcher
  	public Matcher<? super Class<?>> getClassMatcher() {
  		return Matchers.any();
  	}
  
  	@MethodMatcher
  	public Matcher<? super Method> getMethodMatcher() {
  		return Matchers.annotatedWith(Intercept.class);
  	}
  
  }