I am using antlr4.3 (complete) jar. It has many duplicates in org.antlr.runtime and org.antlr.v4.runtime packages.
In code when I explicitly use 'v4.runtime' - at runtime, classpath picks up 'runtime'. So I extracted the jar and recreated it without org.antlr.runtime.
But apparently some classes like RecognitionException is now not found.
How should I resolve this other than:
Exploding the latest Jar and specifying org.antlr.v4.runtime BEFORE org.antlr.runtime so that a duplicate class will be picked up from v4.runtime, and if there isn't one in it, it will look at org.antlr.runtime...??
To add to the above, here's the code snippet which gives a problem: the jars are in the classpath.
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.ANTLRInputStream;
public class AntlrMain {
public static void main(String[] args) {
System.out.println("Start Hello World");
try {
InputStream is = new FileInputStream(
"/home/ecworkspace/antlrCentral/DSL/mydev.dsl");
org.antlr.runANTLRInputStream input = new ANTLRInputStream(is);
org.antlr.v4.runtime.CharStream cs = (org.antlr.v4.runtime.CharStream) input;
VCFGLexer lexer = new VCFGLexer(cs);
- Initially in the ANtlrMain class, I wasn't using explicit
org.antlr.v4.runtime.; but that failed at runtime, with
'CharStream not found'. - Then I changed to include full path of the class
- Then changed the ANTLR4 Jar to 'exclude' org.antlr.runtime (it has org.antlr.v4.runtime). That's when the
'RecognitionException not found'error occurred.
The grammar by the way, compiles OK, generating all my VCFG*.java and tokens classes, where VCFG is the grammar name.
UPDATE 1
Keeping in line with suggestions from all - I removed my answer to my own questions and adding it to this original questions.
In antlr-4.2-complete.jar, I see:
/tmp/x/ $ jar -xf antlr-4.2-complete.jar
/tmp/x/ $ ls org/antlr
runtime stringtemplate v4
/tmp/x/ $ ls org/antlr/v4
analysis codegen parse semantics Tool$1UndefChecker.class Tool$OptionArgType.class
automata misc runtime tool Tool.class Tool$Option.class
/tmp/x/ $ ## The 2 runtimes above: org.antlr.runtime and org.antlr.v4.runtime
/tmp/x/ $ ## which to use where, along with same-name classes in
/tmp/x/ $ ## org.antlr and org.antlr.v4
So, in build.xml, I use above jar to: `
- java -jar antlr-4.2-complete grammar.g4 => compiles and gives me VCFG*.java and VCFG*.tokens
- javac -cp "antlr-4.2-complete-jar" VCFG*.java => Succeeds. I have the VCFG*.class collection.
- Then I compile my code AntlrMain.java (which uses AntlrInputStream
etc.), again with the above antlr jar and some 3rd-party Jars
(logging, commons) => successfully. - Finally the RUN of
java -cp "antlr-4.2-complete.jar:log4j.jar" -jar myJar=> FAILS on 'CharStream' not found.
UPDATE 2
Adding, based on your response.
I have only recently started posting questions on Stackoverflow. So pointers about whether to respond to my question to provide more info, or to comment to a reply etc. are welcome.
-cp <3rd-party> is -cp "log4j.jar:commonsLang.jar".
By -cp "above-jar" I meant -cp "antlr-4.2-complete.jar.
And if I have not mentioned it, it is an oversight - I have, for every 'java' and 'javac commands, included antlr-4.2-complete.jar. BUT I see you indicating antlr-runtime-4.2.jar. So there ARE separate antlr-runtime jar and antlr-complete jars.
In the 4 steps below (I am leaving out -cp for convenience, but am including antlr-4.2-complete.jar for 'every' step.
I believe, I should be using the antlr-run-time and antlr-complete jars at different steps:
1 (java MyGrammar.java)
2 (javac MyGrammar*.java)
3. javac MyOwnCode.java
4. Run myCode (java MyCode) ...
which of the two antlr JARs (runtime and complete; and their versions) should I then use, at each of the above 4 steps?
