/*
 * @Author : Abhijeet Kulkarni
 * @Version 1.0
 * Copyright (C) 2003 Oracle Corporation
 *
 * Development Environment : Oracle9i JDeveloper
 * Creation / Modification History
 * Abhijeet Kulkarni            1-July-2003       Created
 *
 */

//Package definition
package oracle.otnsamples.orajaxb;


//Importing the required classes generated by the JAXB Class Generator
import jaxbderived.profile.Address;
import jaxbderived.profile.Claims;
import jaxbderived.profile.Profile;
import jaxbderived.profile.Customer;
import jaxbderived.profile.Record;
import jaxbderived.profile.ObjectFactory;

//Importing the required IO classes
import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.PrintWriter;
import java.io.StringWriter;

import java.net.URL;

//Importing the required utility classes
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.List;
import java.util.ListIterator;

//Importing the required Swing classes
import javax.swing.JTextArea;

//Importing the required XML classes
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;


/**
 * This is the base class that implements IProfileManager interface. This class
 * is extended by DBRecordHolder class to offer functionality specific to
 * database storage handling. This class has methods that allow users to
 * navigate and manage list of Record objects. It also has support methods
 * that is used to load sample Record objects from the local directory.
 */
public class RecordHolder implements IProfileManager {
    public Record currentRecord;
    protected JTextArea textArea;
    protected List list = Collections.synchronizedList(new ArrayList());
    protected ListIterator listiterator = null;
    protected MainFrame mainFrame;
    protected String dirPath = null;
    protected boolean valid = false;

    /**
     * Creates a new RecordHolder object.
     *
     * @param frame Reference to the MainFrame object
     * @param area Reference to the text area where message logs are displayed
     */
    public RecordHolder(MainFrame frame, JTextArea area) {
        mainFrame = frame;
        textArea = area;
    }

    /**
     * Returns the previous record in the list
     *
     * @param rec Reference to the current record object
     *
     * @return Reference to the previous object
     */
    public Record getPreviousRecord(Record rec) {
        try {
            int i = list.indexOf(currentRecord);

            list.set(i, rec);

            if (i >= 0) {
                currentRecord = (Record) list.get(i - 1);
            } else {
                currentRecord = (Record) list.get(i);
            }
        } catch (Exception e) {
        } finally {
            return currentRecord;
        }
    }

    /**
     * Returns reference of the next record
     *
     * @param rec Reference to the current record object
     *
     * @return Reference to the next object
     */
    public Record getNextRecord(Record rec) {
        try {
            int i = list.indexOf(currentRecord);

            list.set(i, rec);

            if (i < (list.size() - 1)) {
                currentRecord = (Record) list.get(++i);
            } else {
                currentRecord = (Record) list.get(i);
            }
        } catch (Exception e) {
        } finally {
            return currentRecord;
        }
    }

    /**
     * Saves the current record
     *
     * @param rec Saves the current record in the active database  repository
     */
    public void saveRecord(Record rec) {
        try {
            //Create a JAXBContext instance
            JAXBContext jc = JAXBContext.newInstance(
                    "jaxbderived.profile"
                );
            String filename = null;
            if ( !dirPath.endsWith(".xml"))    
              filename = dirPath + "/" + currentRecord.getCustomerID() +".xml";
            else filename = dirPath;  

            textArea.append(" Saving file  " + filename + "\n");

            File f = new File(filename);

            f.delete();

            //Create a marshaler object
            Marshaller m = jc.createMarshaller();
            StringWriter swriter = new StringWriter();

            //Marshal the record object
            m.marshal(rec, swriter);

            //Store the marshaled object in the String
            String s = swriter.toString();

            //Output this String to a file
            FileOutputStream fout = new FileOutputStream(filename);
            PrintWriter pw = new PrintWriter(fout);

            pw.write(s);

            //Flush and close file and printWriter
            pw.flush();

            if (pw != null) {
                pw.close();
            }

            if (fout != null) {
                fout.close();
            }

            textArea.append("Record saved... \n");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Creates a new record
     *
     * @return Creates an empty new record with the help of getEmptyRecord()
     */
    public Record createNewRecord() {
        //Create an empty record object
        Record r = this.getEmptyRecord();

        //Point currentRecord to newly created object
        currentRecord = r;

        //Add newly created object to list
        list.add(list.size(), r);

        //Update the listiterator object
        listiterator = list.listIterator(list.size() - 1);

        return currentRecord;
    }

    /**
     * Removes newly created record
     *
     * @return Returns reference to previous Record
     */
    public Record removeNewRecord() {
        list.remove(currentRecord);
        currentRecord = (Record) list.get(list.size() - 1);

        return currentRecord;
    }

    /**
     * Loads the profile data from the directory specified by the user
     */
    public void loadData() {
        //Create a FileFilter class
        class ProfileFilter implements FilenameFilter {
            /**
             * Filter class
             *
             * @param dir File / Directory reference
             * @param name Name of the file / directory
             *
             * @return boolean value
             */
            public boolean accept(File dir, String name) {
                //Select only those files that match the filter prof*.xml
                if ((name.startsWith("prof") && (name.endsWith("xml")))) {
                    return true;
                } else {
                    return false;
                }
            }
        }

        //Create ProfileFilter instance
        ProfileFilter pf = new ProfileFilter();
        File f = new File(dirPath);

        //Get listing of the files present in the current directory
        String [] farr = f.list(pf);

        textArea.append("Number of files that match filter prof*.xml   " +
            farr.length + "\n"
        );
        textArea.append("Reading files and creating Record objects \n");
        textArea.append("This may take some time. Please wait... \n\n");

        for (int i = 0; i < farr.length; i++) {
            try {
                //Create a JAXBContext instance
                JAXBContext jc = JAXBContext.newInstance(
                        "jaxbderived.profile"
                    );

                //Create an unmarshaller instance
                Unmarshaller u = jc.createUnmarshaller();
               
                u.setValidating(true);
               
                textArea.append("Reading file " + farr[i] + "\n");
                //Unmarshal the Record object from FileInputStream
                Record rec = (Record) u.unmarshal(fileToURL(dirPath+"/"+farr[i]));

                //Store the object in the list
                list.add(rec);
            } catch (Exception ex) {
              textArea.append("There was an error while parsing \n" + farr[i]+
                "\nThis file will be ignored. \n"
            );
            textArea.append(
                "Please note that this error is thrown when the source XML does not "
            );
            textArea.append(
                "confirm to the Profile Record \nSchema definition. The error is given below \n"
            );
            textArea.append(ex.toString() +"\n\n");
            } finally {
            }
        }

        textArea.append(list.size() + " records have been loaded \n ");

        //Get the listiterator reference
        listiterator = list.listIterator(0);

        //Advance the listiterator by 1
        try {
            listiterator.next();
        } catch (Exception ex) {
        }
    }

    /**
     * Sets the directory where sample Records are stored
     *
     * @param s The directory where sample profile data is present
     */
    public void setDirPath(String s) {
        dirPath = s;
    }

    /**
     * Checks if the current record is the last record
     *
     * @return Returns true if the current record is the last record in the
     *         list
     */
    public boolean isLastRecord() {
        int i = list.indexOf(currentRecord);

        if (i == (list.size() - 1)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Checks if the current record is the first record
     *
     * @return Returns true if the current record is the first record in the
     *         list
     */
    public boolean isFirstRecord() {
        int i = list.indexOf(currentRecord);

        if (i == 0) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Returns the number of Record objects present in the list
     *
     * @return Returns the number of Record objects present in the list
     */
    public int getSize() {
        return list.size();
    }

    /**
     * Returns reference of the first record in the list
     *
     * @return Returns the reference to the first record in the list
     */
    public Record getFirstRecord() {
        currentRecord = (Record) list.get(0);

        return currentRecord;
    }

    /**
     * Gets an empty Record object
     *
     * @return Returns a reference to an empty Record object
     */
    public Record getEmptyRecord() {
        Record rec = null;

        try {
            //Create new ObjectFactory instance
            ObjectFactory ofact = new ObjectFactory();

            rec = ofact.createRecord();

            Calendar c = Calendar.getInstance();
            String str = "prof";

            str = str + c.get(Calendar.YEAR) + (c.get(Calendar.MONTH) + 1) +
                c.get(Calendar.DATE) + c.get(Calendar.HOUR_OF_DAY) +
                c.get(Calendar.MINUTE) + c.get(Calendar.SECOND);
            rec.setCustomerID(str);

            //Create Customer object
            Customer cust = ofact.createCustomer();

            cust.setFirstName("");
            cust.setLastName("");
            cust.setGender("");
            cust.setBirthDate("");
            rec.setCustomerRec(cust);

            //Create Address object
            Address addr = ofact.createAddress();

            addr.setLine1("");
            addr.setLine2("");
            addr.setCity("");
            addr.setCountry("");
            addr.setZip(0);
            rec.setAddressRec(addr);

            //Create Profile Object
            Profile pf = ofact.createProfile();

            pf.setCustomerType("Bronze");
            pf.setPremiumAmount((float) 0);
            pf.setPremiumMode("Monthly");
            pf.setRating("Average");
            rec.setProfileRec(pf);

            //Create Claims object
            Claims claims = ofact.createClaims();
            List list = claims.getClaim();

            rec.setClaimsRec(claims);
        } catch (Exception e) {
        }

        return rec;
    }

    /**
     * Returns unique claim id
     *
     * @return Returns a unique string that will be used as claim ID.
     */
    public String getClaimID() {
        Calendar c = Calendar.getInstance();
        String str = "c" + c.get(Calendar.DATE) + c.get(Calendar.HOUR_OF_DAY) +
            c.get(Calendar.MINUTE) + c.get(Calendar.SECOND);

        return str;
    }

    /**
     * This method loads a single Profile Record Object in the list.
     */
    public void loadSingleRecord() {
        textArea.append("This may take some time. Please wait... \n");

        try {
            //Create a JAXBContext instance
            JAXBContext jc = JAXBContext.newInstance(
                    "jaxbderived.profile"
                );

            //Create an unmarshaller instance
            Unmarshaller u = jc.createUnmarshaller();
            u.setValidating(true);
            textArea.append("\nReading file " + dirPath + "\n");

            //Unmarshal the Record object from FileInputStream
            Record rec = (Record) u.unmarshal(fileToURL(dirPath));

            //Store the object in the list
            list.add(rec);
            textArea.append("One record loaded.\n Size of the list is " +
                list.size() + " \n"
            );
        } catch (Exception ex) {
            textArea.append("There was an error while parsing \n" + dirPath +
                "\nThis file will be ignored. \n"
            );
            textArea.append(
                "Please note that this error is thrown when the source XML does not "
            );
            textArea.append(
                "confirm to the Profile Record \nSchema definition. The error is given below \n"
            );
            textArea.append(ex.toString() +"\n\n");
        } finally {
        }
    }

    /**
     * Returns Record present in "i"th location
     *
     * @param i index
     *
     * @return Returns reference to a Record object
     */
    public Record getRecord(int i ) {
      return (Record ) list.get(i);
    }

    /**
     * Sets the current record reference
     * 
     * @param r Reference to record object
     */
    public void setCurrentRecord(Record r) {
      this.currentRecord = r;          
    }

     /**
     * Updates the Record list with respect to the data present in the UI controls
     * 
     * @param r Reference to record object
     */
    public void updateCurrentRecord(Record r) {
       try {
            int i = list.indexOf(currentRecord);
            list.set(i, r);
            currentRecord = r;
        } catch (Exception e) {
        }
    }

    /**
    * This method changes the file path to URL path
    * 
    * @param sfile A String containing the location of the file or directory
    * @return URL URL representation of the file or directory location
    */
   private static URL fileToURL(String sfile)
   {
      File file = new File(sfile);
      String path = file.getAbsolutePath();
      String fSep = System.getProperty("file.separator");
      if (fSep != null && fSep.length() == 1)
         path = path.replace(fSep.charAt(0), '/');
      if (path.length() > 0 && path.charAt(0) != '/')
        path = '/' + path;
      try
      {
         return new URL("file" , null, path);
      }
      catch (java.net.MalformedURLException e)
      {
         throw new Error("Error: Unexpected MalformedURLException");
      }
   }
}