[antlr-interest] Problem generating the Java parser for Oracle PL/SQL grammar

[Javier Luis Cánovas Izquierdo]

Hi again!

I have located the problem: The operative system. In Windows (under
Eclipse platform or under MSDOS) it fails. Now, I am using a linux
system and it works. I do not understand the real reason but I prefer
to be able to generate the parser.

Can the operative system be the problem? It is very odd, isn't it? It
is important to note that I am using the ANT task to execute the ANTLR
Tool in Windows, maybe the problem is that. I do not know.

Anyway, thanks for all!

Regards

2008/11/3 Johannes Luber <jaluber at gmx.de>:
> Javier Luis Cánovas Izquierdo schrieb:
>> Hi Johannes, thanks for your fast response.
>>
>> Maybe I have not explined the problem correctly, sorry. I have just
>> proved that changes.
>>
>> I have specified the parameter for the JVM for increasing the memory
>> limit of the JVM. Actually, it is "-Xms1024m -Xmx1024m" (will it need
>> more? really?) and the options section does not contain the line which
>> specifies the output language (it only contains the output and k
>> options).
>>
>> I did not check that the grammar does not contain C# code. However, I
>> suppose that the parser process generation should not depends on the
>> actions included by the user. The problem should appear once the
>> parser is generated, is it true?. Anyway I have just checked the
>> grammar and I have cleaned it to remove the C# actions. The problem
>> keeps on.
>>
>> I have tested the grammar with antlr 3.0.1 and 3.1.1 and both fail. I
>> think that there should be some wrong (or maybe there is a problem
>> with the antlr parser tool). I attach the grammar that I am using and
>> the trace of the last execution.
>>
>> Thanks!
>
> Sorry for the delay. I've tested it myself and I can compile just fine
> (although with some warnings). Could it be that you are doing the
> options order wrong? I use
>
> java -Xmx1024m -cp <paths to jars - use your own here> org.antlr.Tool
> PLSQL3.g
>
> Johannes
>
>>
>> 2008/10/31 Johannes Luber <jaluber at gmx.de>:
>>> Javier Luis Cánovas Izquierdo schrieb:
>>>> Hi,
>>>>
>>>> I am working with ANTLRv3 and the Oracle PL/SQL grammar definition
>>>> which is located in the antlr grammar list webpage and whose author is
>>>> Andrey Kharitonkin. I need to enrich the grammar in order to create a
>>>> data structure of the parsed plsql text. However, I have a problem on
>>>> the first phase: I cannot generate the Java parser with ANTLR tool
>>>> from the grammar of the webpage.
>>>>
>>>> The grammar has activated the backtrack and memoize options and the k
>>>> value is *. When I try to generate the parser, I get a
>>>> "java.lang.OutOfMemoryError: Java heap space" (firstTrace.txt file
>>>> contains the stack trace of this situation). I have tried to
>>>> deactivate the backtrack and memoize options and to set the k value to
>>>> 1 (although it will cause warnings during the generation) and the
>>>> problem keeps on (secondTrace.txt file contains the stack trace of
>>>> this situation).
>>>>
>>>> I have changed the parameters of the JVM to increase the memory limit
>>>> of the virtual machine to 1gb and again, the problem goes on .
>>>> However, the memory charge of the java instance does not exceed 100mb.
>>>> I cannot understand it.
>>>>
>>>> I have to be doing some wrong because the grammar that I am using is
>>>> the same of the grammar list, I have not change anything. I have seen
>>>> that the grammar has the "language=CSharp" option. Could that be the
>>>> problem? Could you help me?
>>>>
>>>> Thanks
>>> You have two problems: The first is that you need to tell the Java VM to
>>> use more memory like "java -Xmx1024m ...". Adjust the number to your
>>> needs. The second problem is that the grammar has been developed with C#
>>> as the output language. Changing "CSharp" to "Java" (or removing that
>>> line) won't help entirely, as all actions are written in C#. You have to
>>> go trough them one by one and fix any incompatibilities.
>>>
>>> Johannes
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>>
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>>>
>>
>>
>>
>> --
>> Javier Luis Cánovas Izquierdo
>> http://zirrus.es
>> zirrus at gmail.com
>>
>
>



-- 
Javier Luis Cánovas Izquierdo
http://zirrus.es
zirrus at gmail.com