package typeinfo;  

import java.lang.reflect.*;
import java.util.regex.*;

/**
 * RUN:
 *         javac typeinfo/ShowMethods.java && java typeinfo.ShowMethods typeinfo.ShowMethods
 * OUTPUT:
 *         public static void main(String[])
 *         public final native Class getClass()
 *         public native int hashCode()
 *         public boolean equals(Object)
 *         public String toString()
 *         public final native void notify()
 *         public final native void notifyAll()
 *         public final void wait(long,int) throws InterruptedException
 *         public final void wait() throws InterruptedException
 *         public final native void wait(long) throws InterruptedException
 *         public ShowMethods()
 */

public class ShowMethods {

    private static String usage = "usage:\n"
        + "ShowMethods qualified.class.name\n"
        + "To show all methods in class or:\n"
        + "ShowMethods qualified.class.name word\n"
        + "To search for methods involving 'word'";

    private static Pattern p = Pattern.compile("\\w+\\.");

    public static void main(String[] args)
    {
        if (args.length < 1) {
            System.out.println(usage);
            System.exit(0);
        }

        int lines = 0;
        try {
            Class<?> c          = Class.forName(args[0]);
            Method[] methods    = c.getMethods();
            Constructor[] ctors = c.getConstructors();

            if (args.length == 1) {
                for (Method method : methods) {
                    System.out.println(p.matcher(method.toString()).replaceAll(""));
                }
                for (Constructor ctor : ctors) {
                    System.out.println(p.matcher(ctor.toString()).replaceAll(""));    
                }

                lines = methods.length + ctors.length;
            }
            else {
                for (Method method : methods) {
                    if (method.toString().indexOf(args[1]) != -1) {
                        System.out.println(p.matcher(method.toString()).replaceAll(""));
                        lines++;
                    }                    
                }

                for (Constructor ctor : ctors) {
                    if (ctor.toString().indexOf(args[1]) != -1) {
                        System.out.println(p.matcher(ctor.toString()).replaceAll(""));
                        lines++;
                    }                    
                }
            }
        }
        catch(ClassNotFoundException e) {
            System.out.println("No such class: " + e);
        }
    }
}