/**

  * 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);

         }

 }