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// **********************************************************************
//
// Copyright (c) 2003-2009 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.
//
// **********************************************************************
class Grammar
{
Grammar(Parser p)
{
_parser = p;
_scanner = new Scanner(_parser);
}
void
parse()
{
while(true)
{
try
{
_token = _scanner.nextToken();
if(_token == null)
{
return;
}
else if(_token.type == Token.TOK_SEMI)
{
// Continue
}
else if(_token.type == Token.TOK_HELP)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.usage();
}
else if(_token.type == Token.TOK_EXIT)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
return;
}
else if(_token.type == Token.TOK_ADD_BOOK)
{
java.util.List s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.addBook(s);
}
else if(_token.type == Token.TOK_FIND_ISBN)
{
java.util.List s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.findIsbn(s);
}
else if(_token.type == Token.TOK_FIND_AUTHORS)
{
java.util.List s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.findAuthors(s);
}
else if(_token.type == Token.TOK_FIND_TITLE)
{
java.util.List s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.findTitle(s);
}
else if(_token.type == Token.TOK_NEXT_FOUND_BOOK)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.nextFoundBook();
}
else if(_token.type == Token.TOK_PRINT_CURRENT)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.printCurrent();
}
else if(_token.type == Token.TOK_RENT_BOOK)
{
java.util.List s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.rentCurrent(s);
}
else if(_token.type == Token.TOK_RETURN_BOOK)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.returnCurrent();
}
else if(_token.type == Token.TOK_REMOVE_CURRENT)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.removeCurrent();
}
else
{
_parser.error("parse error");
}
}
catch(ParseError e)
{
_parser.error("Parse error: " + e.getMessage());
}
}
}
private java.util.List
strings()
{
java.util.List l = new java.util.ArrayList();
while(true)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_STRING)
{
return l;
}
l.add(_token.value);
}
}
static private class ParseError extends RuntimeException
{
ParseError(String msg)
{
super(msg);
}
}
private Parser _parser;
private Scanner _scanner;
private Token _token;
}
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