package bradleyross.library.helpers;
import java.net.URL;
import java.net.URLConnection;
import java.io.File;
import java.io.FileReader;
import java.io.OutputStream;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.util.Map;
import java.util.List;
import java.io.FileOutputStream;
import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import java.awt.Image;
import java.awt.Graphics;
/**
 * Methods to read and write files designed to be
 * used within other programs.
 * <p>Note: {@link java.net.SocketTimeoutException} is a subclass of
 *    {@link java.io.IOException}.</p>
 * <p>Note: Using the {@link URLConnection#setReadTimeout(int) } and
 *    {@link URLConnection#setConnectTimeout(int) } methods should
 *    prevent the methods in this class from hanging.</p>
 * <p>It looks like the best approach is to rerun the process if an
 *    error occurs.  Start with small timeout values and increase them
 *    on each iteration.</p>
 * @author Bradley Ross
 */
public class FileHelpers
{
        /**
         * Since all of the methods and fields are static, the constructor
         * should never be used.
         */
        protected FileHelpers() { ; }
        /**
         * Number of milliseconds to wait for a read or
         * socket operation.
         * @see #getTimeout()
         * @see #setTimeout(int)
         * @see URLConnection#setReadTimeout(int)
         * @see URLConnection#setConnectTimeout(int)
         * @deprecated
         */
        protected static int timeout = 10000;
        /**
         * Length of time allowed for connect operations.
         * 
         * @see URLConnection#setConnectTimeout(int)
         * @see #setConnectTimeout(int)
         * @see #getConnectTimeout()
         */
        protected static int connectTimeout = 500;
        /**
         * Length of time allowed for read operations.
         * 
         * @see URLConnection#setReadTimeout(int)
         * @see #setReadTimeout(int)
         * @see #getReadTimeout()
         */
        protected static int readTimeout = 500;
        /**
         * Timeout for entire transfer in milliseconds.
         * @see #getCombinedTime()
         * @see #setConnectTimeout(int)
         */
        protected static long combinedTime = 80000;
        /**
         * Getter for connectTimeout.
         * 
         * @see #connectTimeout
         * @return Timeout value for connect operations
         */
        public static int getConnectTimeout()
        { return connectTimeout; }
        /**
         * Setter for connectTimeout.
         * 
         * @see #connectTimeout
         * @param value Value to be used for timeout for socket operations.
         */
        public static void setConnectTimeout(int value)
        { connectTimeout = value; }
        /**
         * Getter for readTimeout.
         * 
         * @see #readTimeout
         * @return Timeout value for socket operations
         */
        public static int getReadTimeout()
        { return readTimeout; }
        /**
         * Setter for readTimeout.
         * 
         * @see #readTimeout
         * @param value Value to be used for timeout for read operations
         */
        public static void setReadTimeout(int value)
        { readTimeout = value; }
        /** 
         * Getter for combinedTime
         * @return Milliseconds allowed for entire file transfer
         * @see #combinedTime
         */
        public static long getCombinedTime()
        { return combinedTime; }
        /**
         * Setter for combinedTimeout
         * @param value Number of milliseconds to be allowed for the entire file transfer
         * @see #combinedTime
         */
        public static void setCombinedTime(long value)
        { combinedTime = value; }
        /** 
         * Setter for timeout.
         * 
         * @param value Milliseconds to wait for read or socket operation
         * @see #timeout
         * @deprecated
         */
        public void setTimeout(int value)
        { timeout = value; }
        /**
         * Getter for timeout
         * 
         * @return Milliseconds to wait for read or socket operation
         * @see #timeout
         * @deprecated
         */
        public int getTimeout()
        { return timeout; }
        /** 
         * Determines quantity of diagnostic output to be generated. 
         * @see #getDebugLevel()
         * @see #setDebugLevel(int)
         */
        protected static int debugLevel = 0;
        /**
         * Getter for debugLevel
         * @see #debugLevel
         * @return Value of debugLevel
         */
        public static int getDebugLevel()
        { return debugLevel; }
        /**
         * Setter for debugLevel
         * @see #debugLevel
         * @param value to be used for debugLevel
         */
        public static void setDebugLevel(int value)
        { debugLevel = value; }
        /**
         * Calculates 2 to the power i as a helper in determining timings
         * for some of the operations.
         * @param i Power to which 2 is raised  
         * @return  2 to the power i
         */
        protected static int power(int i)
        {
                if (i <= 0) { return 1; }
                else if (i == 1) { return 2; }
                else if (i == 2) { return 4; }
                else if (i > 32) { return Integer.MAX_VALUE; }
                else
                {
                        int working = 2;
                        for (int i2 = 1; i2 < i; i2++)
                        { working = working * 2; }
                        return working;
                }
        }
        /**
         * Reads the contents of a text file into a String object
         * given the name of the file.
         * @param name  File name
         * @return Contents of file
         * @throws IOException if io problems
         */
        public static String readTextFile(String name)
        throws java.io.IOException
        {
                File inputFile = new File(name);
                if (!inputFile.exists())
                {
                        return (String) null;
                }
                FileReader reader = null;
                StringBuffer working = new StringBuffer();
                char[] buffer = new char[4096];
                try
                {
                        reader = new FileReader(inputFile);
                        while (true)
                        {
                                int length = reader.read(buffer, 0, buffer.length);
                                if (length < 0) { break; }
                                working.append(buffer, 0, length);
                        }
                        reader.close();
                }
                catch (java.io.IOException e)
                {
                        if (Thread.currentThread().isInterrupted()) 
                        { 
                                System.out.println("*****Interrupted");
                                Thread.yield(); 
                                return (String) null; 
                        }
                        System.out.println("Exception encountered " + e.getClass().getName());
                        System.out.println(e.getMessage());
                        e.printStackTrace(System.out);
                        /*
                         * Throwing the exception to the calling program added
                         * 06-November-2008.
                         */
                        throw e;
                }
                return new String(working);
        }
        /**
         * Read the contents referenced by a URL into a String
         * object.
         * <p>The java.net.URL object required as a parameter is
         *    created by a call of the type
         *    <code>java.net.URL url =
         *    new java.net.URL(urlString)</code> where urlString
         *    is a String object containing the URL identifier.</p>
         * <p>This should only be used for text files.  Results are
         *    unpredictable and probably undesirable when working
         *    with binary files.</p>
         *
         * <ul>
         * <li><p>ftp:  <code>ftp://userid:password@host:port/file</code></p>
         *     </li>
         * <li><p>file:  <code>file:// (file name starting with / indicating root)</code></p>
         *     </li>
         * </ul>
         * @param address URL of desired contents
         * @return String
         * @throws IOException if io problems
         */
        public static String readTextFile(java.net.URL address)
        throws java.io.IOException
        {
                StringBuffer working = new StringBuffer();
                long startTime = System.currentTimeMillis();
                long currentTime = System.currentTimeMillis();
                long endTime = System.currentTimeMillis() + combinedTime;
                int totalLength = 0;
                boolean success = false;
                int tries = 0;
                for (int i = 0; i < 4; i++)
                {
                        tries++;
                        try
                        {
                                URLConnection connection = null;
                                connection = address.openConnection();
                                connection.setConnectTimeout(connectTimeout * power(i));
                                connection.setReadTimeout(readTimeout * power(i));
                                connection.connect();
                                java.io.FilterInputStream contents = 
                                        (java.io.FilterInputStream) connection.getContent();
                                if (debugLevel > 0)
                                {
                                        System.out.println("Class is " + contents.getClass().getName());
                                        System.out.println("Superclass is " +
                                                        contents.getClass().getSuperclass().getName());
                                }
                                byte[] line = new byte[500];
                                java.io.BufferedInputStream buffer = new 
                                java.io.BufferedInputStream(contents);
                                int charsRead;
                                /*  When obtaining the contents, the class of contents is
                                 *   sun.net.www.content.text.PlainTextInputStream
                                 *   whose superclass is
                                 *   java.io.FilterInputStream
                                 */
                                while (true)
                                {
                                        charsRead = buffer.read(line, 0, 490);
                                        if (charsRead < 0) { break; }
                                        // System.out.println("** " + Integer.toString(charsRead) + " **");
                                        working.append(new String(line, 0, charsRead));
                                        totalLength = totalLength + charsRead;
                                        currentTime = System.currentTimeMillis();
                                        if (currentTime > endTime)
                                        { 
                                                throw new java.io.IOException("Time limit of " +
                                                                Long.toString(combinedTime) + " milliseconds exceeded" +
                                                " readTextFile(URL)"); 
                                        }
                                }
                                if (currentTime - startTime > 30000l)
                                { 
                                        System.out.println(Long.toString(currentTime - startTime) + " milliseconds for " +
                                                        Integer.toString(totalLength) + " bytes"); 
                                }
                                if (debugLevel > 0)
                                { 
                                        System.out.print(" " + Integer.toString(totalLength) +
                                        " bytes "); 
                                }
                                success = true;
                        }
                        catch (java.io.IOException e)
                        {
                                if (Thread.currentThread().isInterrupted()) 
                                { 
                                        System.out.println("***** Interrupted");
                                        Thread.yield(); 
                                        return (String) null; 
                                }
                                System.out.println("Exception encountered in readTextFile " +
                                                "(Attempt " + Integer.toString(tries) + ") ");
                                System.out.println("   " + e.getClass().getName() + " " + e.getMessage());
                                if (tries > 4) { throw e; }
                        }
                        if (success) {break; }
                }
                if (success && tries > 1)
                { System.out.println("Success after " + Integer.toString(tries) + " tries"); }
                return new String(working);
        }
        /**
         * Write the contents of a byte array to a URL as a binary data stream.
         * <p>It appears that you can write to protocol ftp but not to protocol
         *    file.</p>
         * @param address URL of destination
         * @param data Byte array to be sent
         * @throws java.io.IOException if io problems
         * @throws java.net.SocketTimeoutException if timeout
         * 
         * @see java.net.URLConnection
         */
        public static void sendBytes (java.net.URL address, byte[] data) 
        throws java.io.IOException
        {
                int tries = 0;
                boolean success = false;
                for (int i = 0; i < 4; i++)
                {
                        URLConnection connection = null;
                        java.io.OutputStream output = null;
                        try
                        {
                                connection = address.openConnection();
                                connection.setDoInput(false);
                                connection.setDoOutput(true);
                                connection.setReadTimeout(readTimeout * power(i));
                                connection.setConnectTimeout(connectTimeout * power(i));
                                showProperties(connection);
                                connection.connect();
                                output = connection.getOutputStream();
                                output.write(data);
                                output.close();
                                success = true;
                        }
                        catch (java.io.IOException e)
                        {
                                if (Thread.currentThread().isInterrupted()) 
                                { 
                                        System.out.println("***** Interrupted");
                                        Thread.yield(); 
                                        return; 
                                }
                                System.out.println("Error in sendBytes: " + e.getClass().getName() + " " +
                                                e.getMessage());
                        }
                        tries++;
                        if (success) { break; }
                }
                if (!success)
                {
                        System.out.println("Failure after " + Integer.toString(tries) + " tries");
                        throw new IOException("Failure after " + Integer.toString(tries) + " tries");
                }
                if (success && tries > 1)
                { 
                        System.out.println("Success after " + Integer.toString(tries) + " tries"); 
                }
        }
        /**
         * Write the contents of a file to a URL, passing the data as
         * a byte stream (binary data).
         * @param address URL of destination
         * @param data File object containing data to be sent
         * @throws java.io.IOException if io problems
         */
        public static void sendBytes (java.net.URL address, java.io.File data) 
        throws java.io.IOException
        {
                int tries = 0;
                boolean success = false;
                for (int i = 0; i < 4; i++)
                {
                        long startTime = System.currentTimeMillis();
                        long currentTime = startTime;
                        long endTime = startTime + combinedTime;
                        URLConnection connection = null;
                        java.io.FileInputStream input = null;
                        java.io.OutputStream output = null;
                        byte[] buffer = new byte[32768];
                        int byteCounter = 0;
                        int readCounter = 0;
                        try
                        {
                                connection = address.openConnection();
                                connection.setDoInput(false);
                                connection.setDoOutput(true);
                                /*
                                 * I changed the multiplier from (i+1) to
                                 * power(i)
                                 */
                                connection.setReadTimeout(readTimeout * power(i));
                                connection.setConnectTimeout(connectTimeout * power(i));
                                showProperties(connection);
                                connection.connect();
                                output = connection.getOutputStream();
                                input = new java.io.FileInputStream(data);
                                while (true)
                                {
                                        int length = input.read(buffer);
                                        if (length < 0) { break; }
                                        output.write(buffer, 0, length);
                                        byteCounter = byteCounter + length;
                                        readCounter++;
                                        // Thread.yield();
                                        if (System.currentTimeMillis() > endTime)
                                        { 
                                                throw new java.io.IOException("Time limit of " +
                                                                Long.toString(combinedTime) + 
                                                " milliseconds exceeded in sendBytes(URL, File)"); 
                                        }
                                }
                                currentTime = System.currentTimeMillis();
                                if (currentTime - startTime > 30000l)
                                {
                                        System.out.println("sendBytes(URL, File) required " + Long.toString(currentTime - startTime) +
                                                        " milliseconds to process " + data.getCanonicalPath() + " : " +
                                                        Integer.toString(byteCounter) + " bytes in " + Integer.toString(readCounter) +
                                        " reads");
                                        String name = address.getFile();
                                        /*
                                         * It is necessary to remove the portion of the name following the semicolon since the
                                         * URL methods include the type designation (;type=i or ;type=a) with the name portion of the
                                         * URL.
                                         */
                                        if (name.indexOf(";") > 0)
                                        {
                                                name = name.substring(0, name.indexOf(";"));
                                        }
                                        System.out.println("Guessed MIME type for " + name +
                                                        " is " + URLConnection.guessContentTypeFromName(name));
                                }
                                input.close();
                                output.close();
                                success = true;
                        }
                        catch (java.io.IOException e)
                        {
                                if (Thread.interrupted()) { Thread.yield(); return; }
                                System.out.println("Error in sendBytes: " + e.getClass().getName() + " " +
                                                e.getMessage());
                        }
                        tries++;
                        if (success) { break; }
                }
                if (!success)
                { 
                        System.out.println("Failure after " + Integer.toString(tries) + " tries");
                        throw new IOException("Failure after " + Integer.toString(tries) + " tries");
                }
                if (success && tries > 1)
                { 
                        System.out.println("Success after " + Integer.toString(tries) + " tries");
                }
        }
        /**
         * Send the contents of an InputStream to a File.
         * @param output File object for output.
         * @param input InputStream for input.
         */
        public static void sendBytes (File output, InputStream input)
        {
                byte buffer[] = new byte[65536];
                int charsRead = 0;
                int totalChars = 0;
                try
                {
                        FileOutputStream sender = new FileOutputStream(output);
                        while (true)
                        {
                                charsRead = input.read(buffer);

                                if (charsRead < 0)
                                {
                                        break;
                                }
                                totalChars = totalChars + charsRead;
                                sender.write (buffer, 0, charsRead);
                                System.out.println(Integer.toString(charsRead) + " " + Integer.toString(totalChars));
                        }
                        sender.close();
                }
                catch (FileNotFoundException e)
                {
                        System.out.println(e.getClass().getName() + " " + e.getMessage());
                }
                catch (IOException e)
                {
                        System.out.println(e.getClass().getName() + " " + e.getMessage());
                }
        }
        /**
         * Read the contents of a URL into a file, passing the
         * data as  byte (binary) stream.
         * 
         * <p>In case of failure, the algorithm retries with
         *    increased values of connectTimeout and
         *    readTimeout.</p>
         * <p>This modification may eventually be added to the
         *    other methods.</p>
         * @param url Location of data to be read
         * @param file File where data is to be written
         * @see URLConnection#setReadTimeout(int)
         * @see URLConnection#setConnectTimeout(int)
         * @throws java.io.IOException if io errors
         */
        public static void getBytes(URL url, File file)
        throws java.io.IOException
        {
                boolean success = false;
                int tries = 0;
                int totalLength = 0;
                URLConnection connection = null;
                java.io.FileOutputStream output = null;
                java.io.InputStream input = null;
                byte[] buffer = new byte[32768];
                long startTime = System.currentTimeMillis();
                long endTime = startTime + combinedTime;
                long currentTime = System.currentTimeMillis();
                for (int i = 0; i < 4; i++) 
                {
                        if (output != null)
                        {
                                output.close();
                                output = null;
                        }
                        if (input != null)
                        {
                                input = null; 
                        }
                        if (connection != null)
                        {
                                connection = null;
                        }
                        output = null;
                        input = null;
                        try {
                                connection = url.openConnection();
                                connection.setDoInput(true);
                                connection.setDoOutput(false);
                                connection.setReadTimeout(readTimeout * power(i));
                                connection.setConnectTimeout(connectTimeout * power(i));
                                showProperties(connection);
                                connection.connect();
                                input = connection.getInputStream();
                                while (true) 
                                {
                                        /* 
                                         * The read statement blocks until there
                                         * are characters available to be read.
                                         * 
                                         * I thought that using 
                                         * URLConnection.setReadTimeout
                                         * would result in an exception if the
                                         * time out was exceeded but it doesn't seem
                                         * to be happening.
                                         */
                                        int length = input.read(buffer);
                                        if (length < 0) 
                                        {
                                                break;
                                        }
                                        if (output == null) {
                                                output = new java.io.FileOutputStream(file);
                                        }
                                        output.write(buffer, 0, length);
                                        totalLength = totalLength + length;
                                        Thread.yield();
                                        if (debugLevel > 0) 
                                        {
                                                System.out.print("*");
                                        }
                                        currentTime = System.currentTimeMillis();
                                        if (currentTime > endTime) {
                                                throw new java.io.IOException("Time limit of "
                                                                + Long.toString(combinedTime)
                                                                + " milliseconds exceeded "
                                                                + "in getBytes(URL,File)");
                                        }
                                } /*  End of while loop */

                                input.close();
                                if (output != null) 
                                {
                                        output.close(); 
                                }
                                success = true;
                        } 
                        catch (java.io.IOException e) 
                        {
                                if (Thread.currentThread().isInterrupted()) 
                                {
                                        System.out.println("***** Interrupted");
                                        Thread.yield();
                                        return;
                                }
                                if (i == 3 || debugLevel > 0)
                                {
                                        System.out.println("Error in getBytes: "
                                                        + e.getClass().getName() + " " + e.getMessage());
                                        System.out.println("     Number of bytes moved: "
                                                        + Integer.toString(totalLength));
                                }
                                if (i == 3)
                                {
                                        throw e;
                                }
                        }
                        tries = i + 1;
                        if (success) { break; }
                }
                if (!success)
                {
                        System.out.println("Failure after " + Integer.toString(tries) + " tries"); 
                }
                else if (success && tries > 1 && debugLevel > 0)
                {
                        System.out.println("Success after " + Integer.toString(tries) + " tries");
                }
                if (debugLevel > 0)
                { System.out.print("      " + Integer.toString(totalLength) + " bytes "); }
                if (currentTime - startTime > 30000)
                {
                        System.out.println(Long.toString(currentTime - startTime) +
                                        " milliseconds for " + Integer.toString(totalLength) +
                        " bytes");
                }
        }
        /**
         * Read the contents of a  a file and then sends
         * the data to a OutputStream object.
         * 
         * @param input File containing data to be written
         * @param output OutputStream object where data is to be written
         * @throws java.io.IOException if io errors
         * @see File
         */
        public static void getBytes(File input, OutputStream output)
        throws java.io.IOException
        {
                FileInputStream reader = new FileInputStream(input);
                int totalLength = 0;
                byte[] buffer = new byte[4096];
                long startTime = System.currentTimeMillis();
                long currentTime = startTime;
                long endTime = startTime + combinedTime;
                if (debugLevel > 1)
                {
                        System.out.println("getBytes(File,OutputStream: " + input.getName() + " exists: " +
                                        Boolean.toString(input.exists()));
                        System.out.println("getBytes(File,OutputStream): ");
                }
                try
                {
                        while (true)
                        {
                                /* 
                                 * The read statement blocks until there
                                 * are characters available to be read.
                                 * 
                                 * I thought that using 
                                 * URLConnection.setReadTimeout
                                 * would result in an exception if the
                                 * time out was exceeded but it doesn't seem
                                 * to be happening.
                                 */
                                int length = reader.read(buffer);
                                if (debugLevel > 1)
                                {
                                        System.out.println(Integer.toString(length) + " bytes read");
                                }
                                if (length < 0) { break; }

                                output.write(buffer, 0, length);
                                totalLength = totalLength + length;
                                Thread.yield();
                                if (debugLevel > 0) { System.out.print("*"); }
                                currentTime = System.currentTimeMillis();
                                if (currentTime > endTime)
                                { 
                                        reader.close();
                                        throw new java.io.IOException("Time limit of " +
                                                        Long.toString(combinedTime) + 
                                        " milliseconds exceeded in getBytes(File, OutputStream)"); 
                                }
                        }
                        if (debugLevel > 0)
                        { System.out.println("Total of " + Integer.toString(totalLength) + " bytes processed "); }
                        if (currentTime - startTime > 30000)
                        {
                                System.out.println(Long.toString(currentTime - startTime) + " milliseconds for " +
                                                Integer.toString(totalLength) + " bytes");
                        }
                }
                catch (java.io.IOException e)
                {
                        if (Thread.currentThread().isInterrupted()) 
                        { 
                                System.out.println("***** Interrupted");
                                Thread.yield(); 
                                return; 
                        }
                        System.out.println("Error in getBytes: " + e.getClass().getName() + " " +
                                        e.getMessage());
                        System.out.println("Number of bytes moved: " +
                                        Integer.toString(totalLength));
                        throw e;
                }
                reader.close();
        }       
        /**
         * Read the contents of a  a URL and then sends
         * the data to a OutputStream object.
         * 
         * @param url URL of item to be copied
         * @param output OutputStream object where data is to be written
         * @throws java.io.IOException if io errors
         * 
         */
        public static void getBytes(URL url, OutputStream output)
        throws IOException
        {
                boolean success = false;
                int tries = 0;
                int totalLength = 0;
                URLConnection connection = null;
                java.io.InputStream input = null;
                byte[] buffer = new byte[32768];
                long startTime = System.currentTimeMillis();
                long endTime = startTime + combinedTime;
                long currentTime = System.currentTimeMillis();
                for (int i = 0; i < 4; i++) 
                {
                        if (input != null)
                        {
                                input = null; 
                        }
                        if (connection != null)
                        {
                                connection = null;
                        }
                        input = null;
                        try {
                                connection = url.openConnection();
                                connection.setDoInput(true);
                                connection.setDoOutput(false);
                                connection.setReadTimeout(readTimeout * power(i));
                                connection.setConnectTimeout(connectTimeout * power(i));
                                showProperties(connection);
                                connection.connect();
                                input = connection.getInputStream();

                                while (true) {
                                        /* 
                                         * The read statement blocks until there
                                         * are characters available to be read.
                                         * 
                                         * I thought that using 
                                         * URLConnection.setReadTimeout
                                         * would result in an exception if the
                                         * time out was exceeded but it doesn't seem
                                         * to be happening.
                                         */
                                        int length = input.read(buffer);
                                        if (length < 0) {
                                                break;
                                        }

                                        output.write(buffer, 0, length);
                                        totalLength = totalLength + length;
                                        Thread.yield();
                                        if (debugLevel > 0) {
                                                System.out.print("*");
                                        }
                                        currentTime = System.currentTimeMillis();
                                        if (currentTime > endTime) {
                                                throw new java.io.IOException("Time limit of "
                                                                + Long.toString(combinedTime)
                                                                + " milliseconds exceeded "
                                                                + "in getBytes(URL,File)");
                                        }
                                } /*  End of while loop */

                                input.close();
                                if (output != null) 
                                {
                                        output.close(); 
                                }
                                success = true;
                        } 
                        catch (java.io.IOException e) 
                        {
                                if (Thread.currentThread().isInterrupted()) {
                                        System.out.println("***** Interrupted");
                                        Thread.yield();
                                        return;
                                }
                                System.out.println("Error in getBytes: "
                                                + e.getClass().getName() + " " + e.getMessage());
                                System.out.println("     Number of bytes moved: "
                                                + Integer.toString(totalLength));
                                if (i == 3)
                                {
                                        throw e;
                                }
                        }
                        tries = i + 1;
                        if (success) { break; }
                }
                if (!success)
                {
                        System.out.println("Failure after " + Integer.toString(tries) + " tries"); 
                }
                else if (success && tries > 1)
                {
                        System.out.println("Success after " + Integer.toString(tries) + " tries");
                }
                if (debugLevel > 0)
                { System.out.print("      " + Integer.toString(totalLength) + " bytes "); }
                if (currentTime - startTime > 30000)
                {
                        System.out.println(Long.toString(currentTime - startTime) +
                                        " milliseconds for " + Integer.toString(totalLength) +
                        " bytes");
                }
        }
        /**
         * Copy a file.
         * 
         *    
         * @param input File object for file to be copied
         * @param output File object for copy of file to be created
         * @throws IOException if io errors
         * @see FileOutputStream
         */
        public static void copyFile (File input, File output)
        throws IOException
        {
                boolean test;
                if (!input.exists())
                {
                        throw new IOException("copyFile: input file does not exist");
                }
                if (!input.canRead())
                {
                        throw new IOException("copyFile: unable to read input file");
                }
                if (!output.getParentFile().exists())
                {
                        System.out.println("Creating directory " + output.getParent());
                        fixDirs(output);
                }
                if (!output.exists())
                {
                        test = output.createNewFile();
                        if (!test)
                        {
                                System.out.println("Error creating new file");
                                throw new IOException("Unable to create new file");
                        }
                }
                if (!output.canWrite())
                {
                        throw new IOException("copyFile: unable to write output file");
                }
                if (debugLevel > 1)
                {
                        System.out.println("copyFile(File,File): Starting copyFile");
                        System.out.println("*** " + input.getName() + " exists: " + Boolean.toString(input.exists()));
                        System.out.println("***     " + input.getCanonicalPath());
                        System.out.println("***     length:    " + Long.toString(input.length()));
                        System.out.println("***     canRead(): " + Boolean.toString(input.canRead()));
                        System.out.println("*** " + output.getName() + " exists: " + Boolean.toString(output.exists()));
                }
                FileOutputStream outputStream = new FileOutputStream(output);
                getBytes(input, outputStream);
                outputStream.close();
        }
        /**
         * Copy a file.
         * 
         * @param inputFileName Name of file to be copied
         * @param outputFileName Name of copy of file to be created
         * @throws IOException if io errors
         * @see  bradleyross.library.helpers.tests.TestCopyFile
         */
        public static void copyFile (String inputFileName, String outputFileName)
        throws IOException
        {
                File input = new File(inputFileName);
                File output = new File(outputFileName);
                copyFile(input, output);
        }
        /**
         * Checks to see if directories for a file exist, and then
         * creates directories as appropriate.
         * @param newFile File object to be created
         * @throws java.io.IOException if io errors
         * @see File
         */
        public static void fixDirs(File newFile)
        throws java.io.IOException
        {
                try
                {
                        File directory = newFile.getParentFile();
                        if (directory == null) { return; }
                        if (directory.exists()) 
                        { return; }
                        else
                        { 
                                directory.mkdirs();
                                return;
                        }
                }
                catch (Exception e)
                {
                        System.out.println("Error in fixDirs: unable to create directories " +
                                        "for " + newFile.toString());
                        System.out.println(e.getClass().getName() + " " +
                                        e.getMessage());
                        e.printStackTrace(System.out);
                        throw new java.io.IOException("Unable to create directories for " +
                                        newFile.toString() + "  " +
                                        e.getClass().getName() + " " + e.getMessage());
                }
        }       

        /**
         * Checks to see if directories for a file exist, and then
         * creates directories as appropriate.
         * @param name Name of file or directory to be created
         * @throws java.io.IOException if io problems
         * @see File
         */
        public static void fixDirs(String name)
        throws IOException
        {
                try
                {
                        File newFile = new File(name);
                        File directory = newFile.getParentFile();
                        if (directory == null) { return; }
                        if (directory.exists()) 
                        { return; }
                        else
                        { 
                                directory.mkdirs();
                                return;
                        }
                }
                catch (Exception e)
                {
                        System.out.println("Error in fixDirs: unable to create directories " +
                                        "for " + name);
                        System.out.println(e.getClass().getName() + " " +
                                        e.getMessage());
                        e.printStackTrace(System.out);
                        throw new java.io.IOException("Unable to create directories for " +
                                        e.getClass().getName() + " " + e.getMessage());
                }
        }
        /**
         * Send properties for connection to System.out
         * <p>This is intended for diagnostic purposes.
         * @param connection Connection object
         */
        public static void showProperties(URLConnection connection)
        {
                if (debugLevel <= 0) { return; }
                Map<String,List<String>> properties = connection.getRequestProperties();
                System.out.println("There are " + Integer.toString(properties.size()) + " properties");
                Object keySet[] = properties.keySet().toArray();
                for (int i = 0; i < keySet.length; i++)
                {
                        System.out.println((String) keySet[i]);
                }
        }
        /**
         * This is a test driver to check out the copyFile method.
         * 
         * @param args Names of original file and copy to be created
         */
        public static void main (String[] args)
        {
                String test = "1, 2, alpha, beta, gamma , ,,,";
                String tokens[] = lineSplitterCommas(test);
                System.out.println("There are " + Integer.toString(tokens.length) + " items");
                for (int i = 0; i < tokens.length; i++)
                {
                        System.out.print("*" + tokens[i] + "  ");
                }
                System.out.println();
                /**
                if (args.length < 2)
                {
                        System.out.println("Not enough arguments");
                }
                try 
                {
                        System.out.println("Copying " + args[0] + " to " + args[1]);
                        copyFile(args[0], args[1]);
                } 
                catch (IOException e) 
                {
                        System.out.println("Error in running driver");
                        System.out.println(e.getClass().getName() + " " + 
                                        e.getMessage());
                        e.printStackTrace();
                }
                 */
        }
        /**
         * Split a line into tokens using spaces as the field separators.
         *
         * <p>This method can be used as an example of processing regular
         *    expressions in Java.</p>
         * @param input Line to be split into tokens
         * @return Array of strings containing the tokens.
         */
        public static String[] lineSplitterSpaces (String input)
        {
                java.util.regex.Pattern pattern = java.util.regex.Pattern.compile ("\\s+");
                java.util.regex.Matcher matcher = pattern.matcher(input.trim());
                String result = matcher.replaceAll(" ");
                return result.split(" ");
        }       
        /**
         * Split a line into tokens using commas as the field separators.
         *
         * <p>The space is suffixed to the input parameter because the system
         *    doesn't seem to recognize a comma as the last character in the
         *    string as signifying a new token.</p>
         * @param input Line to be split into tokens
         * @return Array of strings containing the tokens.
         */
        public static String[] lineSplitterCommas (String input)
        {
                String tokens[] = (input + " ").split(",");
                for (int i = 0; i < tokens.length; i ++)
                {
                        tokens[i] = tokens[i].trim();
                }
                return  tokens;
        }
        /**
         * Create a file containing a thumbnail image from another file.
         * @param inputFile Name of file to be read
         * @param outputFile Name of file to be generated
         * @param sizeX Width of generated image in pixels
         * @param sizeY Height of generated image in pixels
         * @throws IOException if io problems
         * @see BufferedImage
         * @see javax.imageio.ImageIO
         * @see java.awt.image.RenderedImage
         */
        public static void thumbnail(String inputFile, String outputFile, int sizeX, int sizeY) throws IOException {
                thumbnail(new File(inputFile), new File(outputFile), sizeX, sizeY);
        }
        /**
         * Create a file containing a thumbnail image from another file.
         * @param input  file to be read
         * @param output  file to be generated
         * @param sizeX Width of generated image in pixels
         * @param sizeY Height of generated image in pixels
         * @throws IOException if io errors
         * @see BufferedImage
         * @see javax.imageio.ImageIO
         * @see java.awt.image.RenderedImage
         */
        public static void thumbnail(File input, File output, int sizeX, int sizeY) throws IOException
        {
                if (debugLevel > 2)
                {
                        System.out.println("Arguments: " + input.getCanonicalPath() + ", " + output.getCanonicalPath() + ", " +
                                        Integer.toString(sizeX) + ", " + Integer.toString(sizeY));
                }
                Integer targetX = 0;
                Integer targetY = 0;
                if (sizeX <= 0 && sizeY <= 0)
                {
                        throw new IOException("Either target width or target height must be positive");
                }
                else if (sizeX == 0 || sizeY == 0)
                {
                        throw new IOException("Zero not acceptable for target width or target height");
                }
                String inputFileName = input.getCanonicalPath();
                BufferedImage image = null;
                BufferedImage thumb = null;
                Image intermediate = null;
                String format = null;
                String suffix = null;
                FileOutputStream outputStream = null;
                String outputName = output.getName();
                suffix = outputName.substring(outputName.lastIndexOf(".") + 1);
                if (suffix == null)
                {
                        throw new IOException("No suffix found for output file " +
                                        outputName + " (null value)");
                }
                else if (suffix.equalsIgnoreCase("jpg") || suffix.equalsIgnoreCase("jpeg"))
                { format = "jpeg"; }
                else if (suffix.equalsIgnoreCase("png"))
                { format = "png"; }
                else if (suffix.equalsIgnoreCase("gif"))
                { format = "gif"; }
                else
                { throw new IOException("Unable to process suffix " + suffix + 
                                " for file " + outputName); }
                try 
                {
                        image = javax.imageio.ImageIO.read(new FileInputStream(input));
                } 
                catch (FileNotFoundException e) 
                {
                        throw new IOException("Unable to find file " + inputFileName + " " +
                                        e.getMessage());
                } 
                catch (IOException e) 
                {
                        throw new IOException("Unexpected error while reading file " + inputFileName + " " +
                                        e.getMessage());
                }
                if (sizeX <= 0 || sizeY <= 0)
                {
                        if (debugLevel > 2)
                        {
                                System.out.println("Must adjust one parameter");
                        }
                        Double ratio = (double) image.getWidth() / (double) image.getHeight();
                        if (sizeX < 0)
                        {
                                targetY = sizeY;
                                targetX = (int) (Math.floor((double) sizeY * ratio));
                        }
                        else if (sizeY < 0)
                        {
                                targetX = sizeX;
                                targetY = (int) (Math.floor((double) sizeX / ratio));
                        }
                }
                else if (sizeX > 0 && sizeY > 0)
                {
                        targetX = sizeX;
                        targetY = sizeY;
                }
                intermediate = image.getScaledInstance(targetX, targetY, BufferedImage.SCALE_FAST);
                thumb = new BufferedImage(targetX, targetY, BufferedImage.TYPE_INT_RGB);
                Graphics g = thumb.createGraphics();
                g.drawImage(intermediate, 0, 0, null);
                outputStream = new FileOutputStream(output);
                ImageIO.write(thumb, format, outputStream);
        }
        /**
         * Makes file with thumbnail image
         * @param input Input file
         * @param output Output file
         * @param size Height and width of output image in pixels
         * @throws IOException if io errors
         */
        public static void thumbnail(String input, String output, int size) throws IOException
        {
                thumbnail(new File(input), new File(output), size, size);
        }
        /**
         * Makes file with thumbnail image
         * @param input Input file
         * @param output Output file
         * @throws IOException if io problems
         */
        public static void thumbnail(String input, String output) throws IOException
        {
                thumbnail(new File(input), new File(output), 150, 150);
        }
}