Coverage Report - org.mule.component.BindingInvocationHandler
 
Classes in this File Line Coverage Branch Coverage Complexity
BindingInvocationHandler
0%
0/52
0%
0/32
0
 
 1  
 /*
 2  
  * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 3  
  * The software in this package is published under the terms of the CPAL v1.0
 4  
  * license, a copy of which has been included with this distribution in the
 5  
  * LICENSE.txt file.
 6  
  */
 7  
 package org.mule.component;
 8  
 
 9  
 import org.mule.DefaultMuleEvent;
 10  
 import org.mule.DefaultMuleMessage;
 11  
 import org.mule.RequestContext;
 12  
 import org.mule.api.MuleContext;
 13  
 import org.mule.api.MuleEvent;
 14  
 import org.mule.api.MuleMessage;
 15  
 import org.mule.api.component.InterfaceBinding;
 16  
 import org.mule.api.config.MuleProperties;
 17  
 import org.mule.config.i18n.CoreMessages;
 18  
 import org.mule.transport.NullPayload;
 19  
 import org.mule.util.StringMessageUtils;
 20  
 
 21  
 import java.lang.reflect.InvocationHandler;
 22  
 import java.lang.reflect.Method;
 23  
 import java.util.Map;
 24  
 
 25  
 import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap;
 26  
 
 27  
 import org.apache.commons.logging.Log;
 28  
 import org.apache.commons.logging.LogFactory;
 29  
 
 30  
 public class BindingInvocationHandler implements InvocationHandler
 31  
 {
 32  
 
 33  
     public static final String DEFAULT_METHOD_NAME_TOKEN = "default";
 34  
 
 35  0
     protected static Log logger = LogFactory.getLog(BindingInvocationHandler.class);
 36  
 
 37  0
     protected Map<String, InterfaceBinding> routers = null;
 38  
 
 39  
     protected MuleContext muleContext;
 40  
 
 41  
     @SuppressWarnings("unchecked")
 42  
     public BindingInvocationHandler(InterfaceBinding router)
 43  0
     {
 44  0
         routers = new ConcurrentHashMap();
 45  0
         addRouterForInterface(router);
 46  0
     }
 47  
 
 48  
     public void addRouterForInterface(InterfaceBinding router)
 49  
     {
 50  0
         if (router.getMethod() == null)
 51  
         {
 52  0
             if (routers.size() == 0)
 53  
             {
 54  0
                 routers.put(DEFAULT_METHOD_NAME_TOKEN, router);
 55  
             }
 56  
             else
 57  
             {
 58  0
                 throw new IllegalArgumentException(CoreMessages.mustSetMethodNamesOnBinding().getMessage());
 59  
             }
 60  
         }
 61  
         else
 62  
         {
 63  0
             routers.put(router.getMethod(), router);
 64  
         }
 65  0
         muleContext = router.getEndpoint().getMuleContext();
 66  0
     }
 67  
 
 68  
     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
 69  
     {
 70  0
         if (method.getName().equals("toString"))
 71  
         {
 72  0
             return toString();
 73  
         }
 74  
 
 75  0
         MuleMessage message = createMuleMessage(args);
 76  
 
 77  
         // Some transports such as Axis, RMI and EJB can use the method information
 78  0
         message.setInvocationProperty(MuleProperties.MULE_METHOD_PROPERTY, method.getName());
 79  
 
 80  0
         InterfaceBinding router = routers.get(method.getName());
 81  0
         if (router == null)
 82  
         {
 83  0
             router = routers.get(DEFAULT_METHOD_NAME_TOKEN);
 84  
         }
 85  
 
 86  0
         if (router == null)
 87  
         {
 88  0
             throw new IllegalArgumentException(CoreMessages.cannotFindBindingForMethod(method.getName()).toString());
 89  
         }
 90  
 
 91  0
         MuleEvent currentEvent = RequestContext.getEvent();
 92  0
         MuleEvent replyEvent = router.process(new DefaultMuleEvent(message,currentEvent));
 93  
 
 94  0
         if (replyEvent != null && replyEvent.getMessage()!=null)
 95  
         {
 96  0
             MuleMessage reply = replyEvent.getMessage();
 97  0
             if (reply.getExceptionPayload() != null)
 98  
             {
 99  0
                 throw findDeclaredMethodException(method, reply.getExceptionPayload().getException());
 100  
             }
 101  
             else
 102  
             {
 103  0
                 return determineReply(reply, method);
 104  
             }
 105  
         }
 106  
         else
 107  
         {
 108  0
             return null;
 109  
         }
 110  
     }
 111  
     
 112  
     private MuleMessage createMuleMessage(Object[] args)
 113  
     {
 114  0
         if (args == null)
 115  
         {
 116  0
             return new DefaultMuleMessage(NullPayload.getInstance(), muleContext);
 117  
         }
 118  0
         else if (args.length == 1)
 119  
         {
 120  0
             return new DefaultMuleMessage(args[0], muleContext);
 121  
         }
 122  
         else
 123  
         {
 124  0
             return new DefaultMuleMessage(args, muleContext);
 125  
         }
 126  
     }
 127  
 
 128  
     /**
 129  
      * Return the causing exception instead of the general "container" exception (typically 
 130  
      * UndeclaredThrowableException) if the cause is known and the type matches one of the
 131  
      * exceptions declared in the given method's "throws" clause.
 132  
      */
 133  
     private Throwable findDeclaredMethodException(Method method, Throwable throwable) throws Throwable 
 134  
     {       
 135  0
         Throwable cause = throwable.getCause();
 136  0
         if (cause != null)
 137  
         {
 138  
             // Try to find a matching exception type from the method's "throws" clause, and if so
 139  
             // return that exception.
 140  0
             Class[] exceptions = method.getExceptionTypes();         
 141  0
             for (int i = 0; i < exceptions.length; i++)
 142  
             {
 143  0
                 if (cause.getClass().equals(exceptions[i]))
 144  
                 {
 145  0
                     return cause; 
 146  
                 }                       
 147  
             }   
 148  
         }
 149  
         
 150  0
         return throwable;
 151  
     }
 152  
     
 153  
     private Object determineReply(MuleMessage reply, Method bindingMethod)
 154  
     {
 155  0
         if (MuleMessage.class.isAssignableFrom(bindingMethod.getReturnType()))
 156  
         {
 157  0
             return reply;
 158  
         }
 159  0
         else if (reply.getPayload() == NullPayload.getInstance() && !bindingMethod.getReturnType().isInstance(reply.getPayload()))
 160  
         {
 161  0
             return null;
 162  
         }
 163  
         else
 164  
         {
 165  0
             return reply.getPayload();
 166  
         }
 167  
     }
 168  
     
 169  
     @Override
 170  
     public String toString()
 171  
     {
 172  0
         final StringBuffer sb = new StringBuffer();
 173  0
         sb.append("BindingInvocation");
 174  0
         sb.append("{routers='").append(StringMessageUtils.toString(routers));
 175  0
         sb.append('}');
 176  0
         return sb.toString();
 177  
     }
 178  
     
 179  
 }