Mozilla/mozilla/java/dom/tests/src/ReflectionTest.java

/*
 The contents of this file are subject to the Mozilla Public
 License Version 1.1 (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.mozilla.org/MPL/

 Software distributed under the License is distributed on an "AS
 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 implied. See the License for the specific language governing
 rights and limitations under the License.

 The Original Code is mozilla.org code.

 The Initial Developer of the Original Code is Sun Microsystems,
 Inc. Portions created by Sun are
 Copyright (C) 1999 Sun Microsystems, Inc. All
 Rights Reserved.

 Contributor(s):
*/

package org.mozilla.dom.test;

import java.lang.reflect.*;


public class ReflectionTest
{  public static void main(String[] args)
   {  String name = readLine("Please enter a class name (e.g. java.util.Date): ");
      try
      {  Class cl = Class.forName(name);
         Class supercl = cl.getSuperclass();
         System.out.print("class " + name);
         if (supercl != null && !supercl.equals(Object.class))
            System.out.print(" extends " + supercl.getName());
         System.out.print("\n{\n");
         printConstructors(cl);
         System.out.println();
         printMethods(cl);
         System.out.println();
         printFields(cl);
         System.out.println("}");
      }
      catch(ClassNotFoundException e)
      {  System.out.println("Class not found.");
      }
   }

   public static String readLine(String str)
   {  int ch;
      String r = "";
      boolean done = false;
      System.out.println(str);
      while (!done)
      {  try
         {  ch = System.in.read();
            if (ch < 0 || (char)ch == '\n')
               done = true;
            else if ((char)ch != '\r') // weird--it used to do \r\n translation
               r = r + (char) ch;
         }
         catch(java.io.IOException e)
         {  done = true;
         }
      }
      return r;
   }



   public static void printConstructors(Class cl)
   {  Constructor[] constructors = cl.getDeclaredConstructors();

      for (int i = 0; i < constructors.length; i++)
      {  Constructor c = constructors[i];
         Class[] paramTypes = c.getParameterTypes();
         String name = c.getName();
         System.out.print(Modifier.toString(c.getModifiers()));
         System.out.print(" " + name + "(");
         for (int j = 0; j < paramTypes.length; j++)
         {  if (j > 0) System.out.print(", ");
            System.out.print(paramTypes[j].getName());
         }
         System.out.println(");");
      }
   }
   
   public static void printMethods(Class cl)
   {  Method[] methods = cl.getDeclaredMethods();

      for (int i = 0; i < methods.length; i++)
      {  Method m = methods[i];
         Class retType = m.getReturnType();
         Class[] paramTypes = m.getParameterTypes();
         String name = m.getName();
         System.out.print(Modifier.toString(m.getModifiers()));
         System.out.print(" " + retType.getName() + " " + name 
            + "(");
         for (int j = 0; j < paramTypes.length; j++)
         {  if (j > 0) System.out.print(", ");
            System.out.print(paramTypes[j].getName());
         }
         System.out.println(");");
      }
   }

   public static void printFields(Class cl)
   {  Field[] fields = cl.getDeclaredFields();

      for (int i = 0; i < fields.length; i++)
      {  Field f = fields[i];
         Class type = f.getType();
         String name = f.getName();
         System.out.print(Modifier.toString(f.getModifiers()));
         System.out.println(" " + type.getName() + " " + name 
            + ";");
      }
   }


   public Method[] getMethods(Class cl)
   {  
      Method[] methods = cl.getDeclaredMethods();
      return methods;
   }

   public Class[] getParameters(Method m)
   {  
      Class[] paramTypes = m.getParameterTypes();
      return paramTypes;
   }

   public Constructor[] getConstructors(Class cl)
   {  
      Constructor[] constructors = cl.getDeclaredConstructors();
      return constructors;
   }

   
}