/**
* Replaces instances of Java reserved words that could not appear in a valid Java condition or
* Java variable name that are being used as variable names in string.
*
* @param string the string in which the Java reserved words should be replaced.
* @return string with the Java reserved words replaced with a substitute names.
*/
private static String replaceReservedWords(String string) {
// cheap hack so that pattern never need to look for a key word at
// the beginning or end of string. That way one may simplify the pattern
// to looking for a reserved word that is not prefixed or suffix with a
// letter or number.
string = "(" + string + ")";
for (int i = 0; i < reservedWords.length; i++) {
String reservedWord = reservedWords[i];
Pattern p = Pattern.compile("([\\W])(" + reservedWord + ")([\\W])");
Matcher m = p.matcher(string);
while (m.find()) {
string = m.replaceFirst(m.group(1) + "daikon" + reservedWord + m.group(3));
m = p.matcher(string);
}
}
return string.substring(1, string.length() - 1);
}
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());
}