CODEWITHSUNDEEP
javanlp
MisterMe
MisterMe

Reputation: 159

MaltParser 1.5 PatternSyntaxException

I need to work with MaltParser 1.5 version for parsing russian sentences. So, when I'm trying to type in cmd next command:

java -jar malt.jar

I'm getting next exception:

C:\malt1.5>java -jar malt.jar
Exception in thread "main" java.lang.ExceptionInInitializerError
        at org.maltparser.MaltConsoleEngine.<init>(MaltConsoleEngine.java:29)
        at org.maltparser.Malt.main(Malt.java:17)
Caused by: java.util.regex.PatternSyntaxException: Unclosed character class near index 17
^.*malt[^\]*\.jar$
                 ^
        at java.util.regex.Pattern.error(Unknown Source)
        at java.util.regex.Pattern.clazz(Unknown Source)
        at java.util.regex.Pattern.sequence(Unknown Source)
        at java.util.regex.Pattern.expr(Unknown Source)
        at java.util.regex.Pattern.compile(Unknown Source)
        at java.util.regex.Pattern.<init>(Unknown Source)
        at java.util.regex.Pattern.compile(Unknown Source)
        at org.maltparser.core.helper.SystemInfo.<init>(SystemInfo.java:28)
        at org.maltparser.core.helper.SystemInfo.<clinit>(SystemInfo.java:21)
        ... 2 more

I've tried to run this command whith JRE 1.5 and 1.8.45 - same result.

Upvotes: 0

Views: 50

Answers (1)

mernst
mernst

Reputation: 8147

The problem appears to be the [^\] part of the regex. The [ part starts a character class. Ordinarily ] ends a character class, but it's quoted with \] so you have written a character class that contains everything except the characters ], *, ., j, a, r, $, and is not terminated.

If the character class is supposed to contain everything except backslash, it should be [^\\] rather than [^\]. To write the regex as a Java string, you will need an additional level of quoting: "[^\\\\]". One level of quoting is for the regular expression and the other is for the string.

Upvotes: 1

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