111 lines
4.2 KiB
Java
111 lines
4.2 KiB
Java
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/**
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* Write a description of class Library here.
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*
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* @author (your name)
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* @version (a version number or a date)
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*/
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// Import all required libraries. Not using .* as it is not good practice due to potential conflicts.
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import java.util.ArrayList;
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import java.util.Scanner;
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import java.io.File;
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import java.io.IOException;
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import java.awt.FileDialog;
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import java.awt.Frame;
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public class Library
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{
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private ArrayList<LibraryItem> itemList; // Initialise an ArrayList of name itemList to store LibraryItems
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/*
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* Constructor for objects of class Library
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*/
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public Library()
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{
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itemList = new ArrayList<LibraryItem>();
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}
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/*
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* Appends a LibraryItem to the itemList.
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*/
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public void storeItem( LibraryItem item )
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{
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itemList.add( item );
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}
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/*
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* Prints to the terminal all items in the itemList
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*/
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public void printAllItems()
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{
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for( LibraryItem item : itemList )
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{
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item.printDetails();
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}
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}
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public void readItemData() //throws IOException
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{
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Frame frame = null; // Initialise a null frame
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FileDialog fileBox = new FileDialog( frame, "Open", FileDialog.LOAD ); // Initialise filebox with the null frame pointer
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fileBox.setVisible( true ); // Open a file selection dialog to the user.
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try {
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Scanner fileScanner = new Scanner( new File( fileBox.getDirectory() + fileBox.getFile() ) );
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String typeFlag = "";
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while( fileScanner.hasNextLine() ){
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String lineItem = fileScanner.nextLine();
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//System.out.println( lineItem );
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// Ensure no comments or empty lines are included
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if ( lineItem.contains( "//" ) || lineItem.trim().isEmpty() ){}
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// Check current line is a candidate flag
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else if ( lineItem.startsWith("[" ) ) {
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if ( lineItem.toLowerCase().contains("book") ) {
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typeFlag = "book";
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//System.out.println( "CHANGED FLAG TO READ BOOKS" );
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}
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else if ( lineItem.toLowerCase().contains("periodical") ) {
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typeFlag = "periodical";
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//System.out.println( "CHANGED FLAG TO READ PERIODICALS" );
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}
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else {
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System.out.println( "Flag detected, but no accepted format...\n Cannot store item in Library. Changing Flag to generic and skipping the following: ");
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typeFlag = "generic";
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}
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}
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// Could be a switch case to be more efficient
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// Check current flag for data processing.
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else {
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if ( typeFlag.equals( "book" ) ) {
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// Process Book Data
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Scanner detailScanner = new Scanner ( lineItem ).useDelimiter(","); // Create a new scanner to grab the values in a comma separated list
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LibraryItem book = new Book();
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book.readItemData( detailScanner );
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storeItem( book ); // Store the new LibraryItem in the itemList
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}
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else if ( typeFlag.equals( "periodical" ) ) {
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// Process Periodic Data
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Scanner detailScanner = new Scanner ( lineItem ).useDelimiter(",");
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LibraryItem periodical = new Periodical();
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periodical.readItemData( detailScanner );
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storeItem( periodical );
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}
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else if ( typeFlag.equals( "generic" ) ) {
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// Output unaccepted lines
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System.out.println( lineItem );
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}
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}
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}
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}
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catch( IOException e ) { // Catch any IO Exceptions that may occur from improper file selection.
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System.err.println( "Caught IOException: " + e.getMessage() + "\nAn I/O Exception has occurred, please check file is readable and correct format." );
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}
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}
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}
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