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// **********************************************************************
//
// Copyright (c) 2003-2012 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
import Demo.*;
class Parser
{
Parser(Ice.Communicator communicator, LibraryPrx library)
{
_library = library;
}
void
usage()
{
System.err.print(
"help Print this message.\n" +
"exit, quit Exit this program.\n" +
"add isbn title authors Create new book.\n" +
"isbn NUMBER Find all books that start with the given ISBN number.\n" +
"authors NAME Find all books by the given authors.\n" +
"title NAME Find all books which have the given title.\n" +
"next Set the current book to the next one that was found.\n" +
"current Display the current book.\n" +
"rent NAME Rent the current book for customer NAME.\n" +
"return Return the currently rented book.\n" +
"remove Permanently remove the current book from the library.\n");
}
void
addBook(java.util.List<String> args)
{
if(args.size() != 3)
{
error("`add' requires exactly three arguments (type `help' for more info)");
return;
}
try
{
String isbn = args.get(0);
String title = args.get(1);
java.util.List<String> authors = new java.util.LinkedList<String>();
java.util.StringTokenizer st = new java.util.StringTokenizer(args.get(2), ",");
while(st.hasMoreTokens())
{
authors.add(st.nextToken().trim());
}
BookPrx book = _library.createBook(isbn, title, authors);
System.out.println("added new book with isbn " + isbn);
}
catch(BookExistsException ex)
{
error("the book already exists");
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
findIsbn(java.util.List<String> args)
{
if(args.size() != 1)
{
error("`isbn' requires exactly one argument (type `help' for more info)");
return;
}
try
{
if(_query != null)
{
try
{
_query.destroy();
}
catch(Exception e)
{
// Ignore
}
_query = null;
_current = null;
}
BookDescriptionSeqHolder first = new BookDescriptionSeqHolder();
Ice.IntHolder nrows = new Ice.IntHolder();
BookQueryResultPrxHolder result = new BookQueryResultPrxHolder();
_library.queryByIsbn(args.get(0), 1, first, nrows, result);
System.out.println(nrows.value + " results");
if(nrows.value == 0)
{
return;
}
_current = first.value.get(0);
_query = result.value;
printCurrent();
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
findAuthors(java.util.List<String> args)
{
if(args.size() != 1)
{
error("`authors' requires exactly one argument (type `help' for more info)");
return;
}
try
{
if(_query != null)
{
try
{
_query.destroy();
}
catch(Exception e)
{
// Ignore
}
_query = null;
_current = null;
}
BookDescriptionSeqHolder first = new BookDescriptionSeqHolder();
Ice.IntHolder nrows = new Ice.IntHolder();
BookQueryResultPrxHolder result = new BookQueryResultPrxHolder();
_library.queryByAuthor(args.get(0), 1, first, nrows, result);
System.out.println(nrows.value + " results");
if(nrows.value == 0)
{
return;
}
_current = first.value.get(0);
_query = result.value;
printCurrent();
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
findTitle(java.util.List<String> args)
{
if(args.size() != 1)
{
error("`title' requires exactly one argument (type `help' for more info)");
return;
}
try
{
if(_query != null)
{
try
{
_query.destroy();
}
catch(Exception e)
{
// Ignore
}
_query = null;
_current = null;
}
BookDescriptionSeqHolder first = new BookDescriptionSeqHolder();
Ice.IntHolder nrows = new Ice.IntHolder();
BookQueryResultPrxHolder result = new BookQueryResultPrxHolder();
_library.queryByTitle(args.get(0), 1, first, nrows, result);
System.out.println(nrows.value + " results");
if(nrows.value == 0)
{
return;
}
_current = first.value.get(0);
_query = result.value;
printCurrent();
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
nextFoundBook()
{
if(_query == null)
{
System.out.println("no next book");
return;
}
try
{
Ice.BooleanHolder destroyed = new Ice.BooleanHolder();
java.util.List<BookDescription> next = _query.next(1, destroyed);
if(next.size() > 0)
{
_current = next.get(0);
}
else
{
assert destroyed.value;
_current = null;
}
if(destroyed.value)
{
_query = null;
}
printCurrent();
}
catch(Ice.ObjectNotExistException ex)
{
System.out.println("the query object no longer exists");
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
printCurrent()
{
if(_current != null)
{
System.out.println("current book is:");
System.out.println("isbn: " + _current.isbn);
System.out.println("title: " + _current.title);
System.out.println("authors: " + _current.authors);
if(_current.rentedBy.length() > 0)
{
System.out.println("rented: " + _current.rentedBy);
}
}
else
{
System.out.println("no current book");
}
}
void
rentCurrent(java.util.List<String> args)
{
if(args.size() != 1)
{
error("`rent' requires exactly one argument (type `help' for more info)");
return;
}
try
{
if(_current != null)
{
_current.proxy.rentBook(args.get(0));
System.out.println("the book is now rented by `" + (String)args.get(0) + "'");
_current = _current.proxy.describe();
}
else
{
System.out.println("no current book");
}
}
catch(BookRentedException ex)
{
System.out.println("the book has already been rented");
}
catch(InvalidCustomerException ex)
{
System.out.println("the customer name is invalid");
}
catch(Ice.ObjectNotExistException ex)
{
System.out.println("current book no longer exists");
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
returnCurrent()
{
try
{
if(_current != null)
{
_current.proxy.returnBook();
System.out.println( "the book has been returned");
_current = _current.proxy.describe();
}
else
{
System.out.println("no current book");
}
}
catch(BookNotRentedException ex)
{
System.out.println("the book is not currently rented");
}
catch(Ice.ObjectNotExistException ex)
{
System.out.println("current book no longer exists");
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
removeCurrent()
{
try
{
if(_current != null)
{
_current.proxy.destroy();
_current = null;
System.out.println("removed current book" );
}
else
{
System.out.println("no current book" );
}
}
catch(Ice.ObjectNotExistException ex)
{
System.out.println("current book no longer exists");
}
catch(Ice.LocalException ex)
{
error(ex.toString());
}
}
void
error(String s)
{
System.err.println("error: " + s);
}
void
warning(String s)
{
System.err.println("warning: " + s);
}
String
getInput()
{
System.out.print(">>> ");
System.out.flush();
try
{
return _in.readLine();
}
catch(java.io.IOException e)
{
return null;
}
}
int
parse()
{
_query = null;
_current = null;
_in = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
Grammar g = new Grammar(this);
g.parse();
return 0;
}
int
parse(String file)
{
_query = null;
_current = null;
try
{
_in = new java.io.BufferedReader(new java.io.FileReader(file));
}
catch(java.io.FileNotFoundException ex)
{
error(ex.getMessage());
return 1;
}
Grammar g = new Grammar(this);
g.parse();
System.out.println();
try
{
_in.close();
}
catch(java.io.IOException ex)
{
}
return 0;
}
private BookQueryResultPrx _query;
private BookDescription _current;
private LibraryPrx _library;
private java.io.BufferedReader _in;
private boolean _interactive;
}
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