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try to solve java antlr parser dfa memory leak

This commit is contained in:
Gang ZHANG 2019-12-21 22:32:01 +08:00
parent 757d605ac6
commit e8dbbe11e5
2 changed files with 8 additions and 2 deletions
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4
pom.xml
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@ -29,7 +29,7 @@
<plugin>
<groupId>org.antlr</groupId>
<artifactId>antlr4-maven-plugin</artifactId>
<version>4.7.1</version>
<version>4.7.2</version>
<executions>
<execution>
<goals>
@ -103,7 +103,7 @@
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-maven-plugin</artifactId>
<version>4.7.1</version>
<version>4.7.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>

6
src/main/java/depends/extractor/java/JavaFileParser.java
View File

@ -30,6 +30,9 @@ import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.Lexer;
import org.antlr.v4.runtime.atn.LexerATNSimulator;
import org.antlr.v4.runtime.atn.ParserATNSimulator;
import org.antlr.v4.runtime.atn.PredictionContextCache;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import depends.entity.repo.EntityRepo;
@ -52,8 +55,10 @@ public class JavaFileParser implements depends.extractor.FileParser{
public void parse() throws IOException {
CharStream input = CharStreams.fromFileName(fileFullPath);
Lexer lexer = new JavaLexer(input);
lexer.setInterpreter(new LexerATNSimulator(lexer, lexer.getATN(), lexer.getInterpreter().decisionToDFA, new PredictionContextCache()));
CommonTokenStream tokens = new CommonTokenStream(lexer);
JavaParser parser = new JavaParser(tokens);
parser.setInterpreter(new ParserATNSimulator(parser, parser.getATN(), parser.getInterpreter().decisionToDFA, new PredictionContextCache()));
JavaListener bridge = new JavaListener(fileFullPath, entityRepo,inferer);
ParseTreeWalker walker = new ParseTreeWalker();
try {
@ -62,6 +67,7 @@ public class JavaFileParser implements depends.extractor.FileParser{
System.err.println("error encountered during parse..." );
e.printStackTrace();
}
}
}