static {
try {
non_word_pattern = Pattern.compile("\\W+");
orig_pattern = Pattern.compile("orig\\s*\\(");
dot_class_pattern = Pattern.compile("\\.class");
inequality_pattern = Pattern.compile("[\\!<>]=");
gteq_pattern = Pattern.compile(">=");
lteq_pattern = Pattern.compile("<=");
neq_pattern = Pattern.compile("\\!=");
contradict_inv_pattern =
Pattern.compile("(^| && )(.*) == -?[0-9]+ &.*& \\2 == -?[0-9]+($| && )");
useless_inv_pattern_1 =
Pattern.compile("(^| && )(.*) > -?[0-9]+ &.*& \\2 > -?[0-9]+($| && )");
useless_inv_pattern_2 =
Pattern.compile("(^| && )(.*) < -?[0-9]+ &.*& \\2 < -?[0-9]+($| && )");
} catch (PatternSyntaxException me) {
throw new Error("ExtractConsequent: Error while compiling pattern " + me.getMessage());
}
}
private static boolean contains_exactly_one(String string, Pattern pattern) {
Matcher m = pattern.matcher(string);
// return true if first call returns true and second returns false
return (m.find() && !m.find());
}