Mismatched input errors in antlr 3.5 - antlr3

Question

i have problems with my grammar code in antlr3.5 . My input file is
` define tcpChannel ChannelName
define
listener
ListnerProperty
end
listener ;
define
execution
request with format RequestFormat,
response with format ResponseFormat,
error with format ErrorFormat ,
call servicename.executionname
end define execution ;
end
define channel ;
`
My lexer code is as follows:
lexer grammar ChannelLexer;
// ***************** lexer rules:
Define
:
'define'
;
Tcpchannel
:
'tcphannel'
;
Listener
:
'Listener'
;
End
:
'end'
;
Execution
:
' execution '
;
Request
:
' request '
;
With
:
' with '
;
Format
:
' format '
;
Response
:
' response '
;
Error
:
' error '
;
Call
:
' call '
;
Channel
:
' channel '
;
Dot
:
'.'
;
SColon
:
';'
;
Comma
:
','
;
Value
:
(
'a'..'z'
|'A'..'Z'
|'_'
)
(
'a'..'z'
|'A'..'Z'
|'_'
|Digit
)*
;
fragment
String
:
(
'"'
(
~(
'"'
| '\\'
)
| '\\'
(
'\\'
| '"'
)
)*
'"'
| '\''
(
~(
'\''
| '\\'
)
| '\\'
(
'\\'
| '\''
)
)*
'\''
)
{
setText(getText().substring(1, getText().length() - 1).replaceAll("\\\\(.)",
"$1"));
}
;
fragment
Digit
:
'0'..'9'
;
Space
:
(
' '
| '\t'
| '\r'
| '\n'
| '\u000C'
)
{
skip();
}
;
My parser code is:
parser grammar ChannelParser;
options
{
// antlr will generate java lexer and parser
language = Java;
// generated parser should create abstract syntax tree
output = AST;
}
// ***************** parser rules:
//our grammar accepts only salutation followed by an end symbol
expression
:
tcpChannelDefinition listenerDefinition executionDefintion endchannel
;
tcpChannelDefinition
:
Define Tcpchannel channelName
;
channelName
:
i= Value
{
$i.setText("CHANNEL_NAME#" + $i.text);
}
;
listenerDefinition
:
Define Listener listenerProperty endListener
;
listenerProperty
:
i=Value
{
$i.setText("PROPERTY_VALUE#" + $i.text);
}
;
endListener
:
End Listener SColon
;
executionDefintion
:
Define Execution execution
;
execution
:
Request With Format requestValue Comma
Response With Format responseValue Comma
Error With Format errorValue Comma
Call servicename Dot executionname
;
requestValue
:
i=Value
{
$i.setText("REQUEST_FORMAT#" + $i.text);
}
;
responseValue
:
i=Value
{
$i.setText("RESPONSE_FORMAT#" + $i.text);
}
;
errorValue
:
i=Value
{
$i.setText("ERROR_FORMAT#" + $i.text);
}
;
servicename
:
i=Value
{
$i.setText("SERVICE_NAME#" + $i.text);
}
;
executionname
:
i=Value
{
$i.setText("OPERATION_NAME#" + $i.text);
}
;
endexecution
:
End Define Execution SColon
;
endchannel
:
End Channel SColon
;
im getting error like missing Tcpchannel at 'tcpChannel' and extraneous input 'ChannelName' expecting Define. How to correct them. Please do help.ASAP