Coverage Report - org.mule.util.scan.InterfaceClassScanner
 
Classes in this File Line Coverage Branch Coverage Complexity
InterfaceClassScanner
0%
0/40
0%
0/16
2.857
 
 1  
 /*
 2  
  * $Id: InterfaceClassScanner.java 19191 2010-08-25 21:05:23Z tcarlson $
 3  
  * --------------------------------------------------------------------------------------
 4  
  * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 5  
  *
 6  
  * The software in this package is published under the terms of the CPAL v1.0
 7  
  * license, a copy of which has been included with this distribution in the
 8  
  * LICENSE.txt file.
 9  
  */
 10  
 package org.mule.util.scan;
 11  
 
 12  
 import org.mule.util.scan.annotations.ClosableClassReader;
 13  
 
 14  
 import java.io.IOException;
 15  
 import java.io.InputStream;
 16  
 import java.net.URL;
 17  
 
 18  
 import org.objectweb.asm.ClassReader;
 19  
 import org.objectweb.asm.commons.EmptyVisitor;
 20  
 
 21  
 /**
 22  
  * Will determine if the class provide is assignable from the interface class provied.
 23  
  */
 24  
 public class InterfaceClassScanner extends EmptyVisitor implements ClassScanner
 25  
 {
 26  
     private Class interfaceClass;
 27  
 
 28  
     private boolean match;
 29  
 
 30  
     private String className;
 31  
 
 32  
     private ClassLoader classLoader;
 33  
 
 34  
     public InterfaceClassScanner(Class interfaceClass)
 35  
     {
 36  0
         this(interfaceClass, Thread.currentThread().getContextClassLoader());
 37  0
     }
 38  
 
 39  
     public InterfaceClassScanner(Class interfaceClass, ClassLoader classLoader)
 40  0
     {
 41  0
         if(!interfaceClass.isInterface())
 42  
         {
 43  0
             throw new IllegalArgumentException("The class need to be an interface");
 44  
         }
 45  0
         this.interfaceClass = interfaceClass;
 46  
 
 47  0
         this.classLoader = classLoader;
 48  0
     }
 49  
 
 50  
     public void visit(int i, int i1, String s, String s1, String superName, String[] interfaces)
 51  
     {
 52  0
         if (interfaces != null && interfaces.length > 0)
 53  
         {
 54  0
             for (int j = 0; j < interfaces.length; j++)
 55  
             {
 56  0
                 String anInterface = interfaces[j].replace("/", ".");
 57  0
                 if (interfaceClass.getName().equals(anInterface))
 58  
                 {
 59  0
                     match = true;
 60  0
                     className = s;
 61  0
                     break;
 62  
                 }
 63  
                 else
 64  
                 {
 65  
                     //No exact match, lets can the Inferface next
 66  0
                     ClassScanner scanner = scan(anInterface);
 67  0
                     match = scanner.isMatch();
 68  0
                     className = s;
 69  
                 }
 70  
 
 71  
             }
 72  
         }
 73  
         //We're processing java.lang.Object
 74  0
         else if (superName == null)
 75  
         {
 76  0
             return;
 77  
         }
 78  
         else
 79  
         {
 80  
             //Lets check the super class
 81  0
             ClassScanner scanner = scan(superName);
 82  0
             match = scanner.isMatch();
 83  0
             className = scanner.getClassName();
 84  
             //If there is a match we need to set the super class not the subclass that matched
 85  0
             if(match)
 86  
             {
 87  0
                 className = s;
 88  
             }
 89  
         }
 90  0
     }
 91  
 
 92  
     protected ClassScanner scan(String name)
 93  
     {
 94  
         try
 95  
         {
 96  0
             InterfaceClassScanner scanner = new InterfaceClassScanner(interfaceClass, classLoader);
 97  0
             URL classURL = getClassURL(name);
 98  0
             if(classURL==null)
 99  
             {
 100  0
                 throw new RuntimeException("Failed to read class URL for name: " + name);
 101  
             }
 102  0
             InputStream classStream = classURL.openStream();
 103  0
             ClassReader r = new ClosableClassReader(classStream);
 104  
             
 105  0
             r.accept(scanner, 0);
 106  0
             return scanner;
 107  
         }
 108  0
         catch (IOException e)
 109  
         {
 110  0
             throw new RuntimeException(name, e);
 111  
         }
 112  
     }
 113  
 
 114  
     public boolean isMatch()
 115  
     {
 116  0
         return match;
 117  
     }
 118  
 
 119  
     public String getClassName()
 120  
     {
 121  0
         return className;
 122  
     }
 123  
 
 124  
     public URL getClassURL(String className)
 125  
     {
 126  0
         String resource = className.replace(".", "/") + ".class";
 127  0
         return classLoader.getResource(resource);
 128  
     }
 129  
 }