--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/util/IntrospectionUtil.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,300 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 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.util;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * IntrospectionUtil
+ *
+ *
+ */
+public class IntrospectionUtil
+{
+    
+    public static boolean isJavaBeanCompliantSetter (Method method)
+    {
+        if (method == null)
+            return false;
+        
+        if (method.getReturnType() != Void.TYPE)
+            return false;
+        
+        if (!method.getName().startsWith("set"))
+            return false;
+        
+        if (method.getParameterTypes().length != 1)
+            return false;
+        
+        return true;
+    }
+    
+    public static Method findMethod (Class<?> clazz, String methodName, Class<?>[] args, boolean checkInheritance, boolean strictArgs)
+    throws NoSuchMethodException
+    {
+        if (clazz == null)
+            throw new NoSuchMethodException("No class");
+        if (methodName==null || methodName.trim().equals(""))
+            throw new NoSuchMethodException("No method name");
+        
+        Method method = null;
+        Method[] methods = clazz.getDeclaredMethods();
+        for (int i=0;i<methods.length && method==null;i++)
+        {
+            if (methods[i].getName().equals(methodName) && checkParams(methods[i].getParameterTypes(), (args==null?new Class[] {}:args), strictArgs))
+            {
+                method = methods[i];
+            }
+            
+        }
+        if (method!=null)
+        {
+            return method;
+        }
+        else if (checkInheritance)
+                return findInheritedMethod(clazz.getPackage(), clazz.getSuperclass(), methodName, args, strictArgs);
+        else
+            throw new NoSuchMethodException("No such method "+methodName+" on class "+clazz.getName());
+
+    }
+    
+    
+    
+    
+
+    public static Field findField (Class<?> clazz, String targetName, Class<?> targetType, boolean checkInheritance, boolean strictType)
+    throws NoSuchFieldException
+    {
+        if (clazz == null)
+            throw new NoSuchFieldException("No class");
+        if (targetName==null)
+            throw new NoSuchFieldException("No field name");
+        
+        try
+        {
+            Field field = clazz.getDeclaredField(targetName);
+            if (strictType)
+            {
+                if (field.getType().equals(targetType))
+                    return field;
+            }
+            else
+            {
+                if (field.getType().isAssignableFrom(targetType))
+                    return field;
+            }
+            if (checkInheritance)
+            {
+                    return findInheritedField(clazz.getPackage(), clazz.getSuperclass(), targetName, targetType, strictType);
+            }
+            else
+                throw new NoSuchFieldException("No field with name "+targetName+" in class "+clazz.getName()+" of type "+targetType);
+        }
+        catch (NoSuchFieldException e)
+        {
+            return findInheritedField(clazz.getPackage(),clazz.getSuperclass(), targetName,targetType,strictType);
+        }
+    }
+    
+    
+    
+    
+    
+    public static boolean isInheritable (Package pack, Member member)
+    {
+        if (pack==null)
+            return false;
+        if (member==null)
+            return false;
+        
+        int modifiers = member.getModifiers();
+        if (Modifier.isPublic(modifiers))
+            return true;
+        if (Modifier.isProtected(modifiers))
+            return true;
+        if (!Modifier.isPrivate(modifiers) && pack.equals(member.getDeclaringClass().getPackage()))
+            return true;
+       
+        return false;
+    }
+    
+   
+    
+    
+    public static boolean checkParams (Class<?>[] formalParams, Class<?>[] actualParams, boolean strict)
+    {
+        if (formalParams==null)
+            return actualParams==null;
+        if (actualParams==null)
+            return false;
+
+        if (formalParams.length!=actualParams.length)
+            return false;
+
+        if (formalParams.length==0)
+            return true; 
+        
+        int j=0;
+        if (strict)
+        {
+            while (j<formalParams.length && formalParams[j].equals(actualParams[j]))
+                j++;
+        }
+        else
+        { 
+            while ((j<formalParams.length) && (formalParams[j].isAssignableFrom(actualParams[j])))
+            {
+                j++;
+            }
+        }
+
+        if (j!=formalParams.length)
+        {
+            return false;
+        }
+
+        return true;
+    }
+    
+    
+    public static boolean isSameSignature (Method methodA, Method methodB)
+    {
+        if (methodA==null)
+            return false;
+        if (methodB==null)
+            return false;
+        
+        List<Class<?>> parameterTypesA = Arrays.asList(methodA.getParameterTypes());
+        List<Class<?>> parameterTypesB = Arrays.asList(methodB.getParameterTypes());
+       
+        if (methodA.getName().equals(methodB.getName())
+            &&
+            parameterTypesA.containsAll(parameterTypesB))
+            return true;
+        
+        return false;
+    }
+    
+    public static boolean isTypeCompatible (Class<?> formalType, Class<?> actualType, boolean strict)
+    {
+        if (formalType==null)
+            return actualType==null;
+        if (actualType==null)
+            return false;
+        
+        if (strict)
+            return formalType.equals(actualType);
+        else
+            return formalType.isAssignableFrom(actualType);
+    }
+
+    
+    
+    
+    public static boolean containsSameMethodSignature (Method method, Class<?> c, boolean checkPackage)
+    {
+        if (checkPackage)
+        {
+            if (!c.getPackage().equals(method.getDeclaringClass().getPackage()))
+                return false;
+        }
+        
+        boolean samesig = false;
+        Method[] methods = c.getDeclaredMethods();
+        for (int i=0; i<methods.length && !samesig; i++)
+        {
+            if (IntrospectionUtil.isSameSignature(method, methods[i]))
+                samesig = true;
+        }
+        return samesig;
+    }
+    
+    
+    public static boolean containsSameFieldName(Field field, Class<?> c, boolean checkPackage)
+    {
+        if (checkPackage)
+        {
+            if (!c.getPackage().equals(field.getDeclaringClass().getPackage()))
+                return false;
+        }
+        
+        boolean sameName = false;
+        Field[] fields = c.getDeclaredFields();
+        for (int i=0;i<fields.length && !sameName; i++)
+        {
+            if (fields[i].getName().equals(field.getName()))
+                sameName = true;
+        }
+        return sameName;
+    }
+    
+    
+    
+    protected static Method findInheritedMethod (Package pack, Class<?> clazz, String methodName, Class<?>[] args, boolean strictArgs)
+    throws NoSuchMethodException
+    {
+        if (clazz==null)
+            throw new NoSuchMethodException("No class");
+        if (methodName==null)
+            throw new NoSuchMethodException("No method name");
+        
+        Method method = null;
+        Method[] methods = clazz.getDeclaredMethods();
+        for (int i=0;i<methods.length && method==null;i++)
+        {
+            if (methods[i].getName().equals(methodName) 
+                    && isInheritable(pack,methods[i])
+                    && checkParams(methods[i].getParameterTypes(), args, strictArgs))
+                method = methods[i];
+        }
+        if (method!=null)
+        {
+            return method;
+        }
+        else
+            return findInheritedMethod(clazz.getPackage(), clazz.getSuperclass(), methodName, args, strictArgs);
+    }
+    
+    protected static Field findInheritedField (Package pack, Class<?> clazz, String fieldName, Class<?> fieldType, boolean strictType)
+    throws NoSuchFieldException
+    {
+        if (clazz==null)
+            throw new NoSuchFieldException ("No class");
+        if (fieldName==null)
+            throw new NoSuchFieldException ("No field name");
+        try
+        {
+            Field field = clazz.getDeclaredField(fieldName);
+            if (isInheritable(pack, field) && isTypeCompatible(fieldType, field.getType(), strictType))
+                return field;
+            else
+                return findInheritedField(clazz.getPackage(), clazz.getSuperclass(),fieldName, fieldType, strictType);
+        }
+        catch (NoSuchFieldException e)
+        {
+            return findInheritedField(clazz.getPackage(), clazz.getSuperclass(),fieldName, fieldType, strictType); 
+        }
+    }
+    
+}