/**
* takes an individual line and cleans it by removing comments and extra whitespace
*
* @param line
* @return cleaned line with comments removed and extra whitespace removed
* <p>NOTE: can handle spaces, can't currently handle tab characters
*/
public static String cleanLine(String line) {
line = line.replaceAll("\\s+", " ");
line = line.replaceAll(" =", "=");
line = line.replaceAll("= ", "=");
StringBuilder str = new StringBuilder();
boolean lastCharSpace = true;
for (int i = 0; i < line.length(); i++) {
// exit the loop if we're at a comment
if (line.charAt(i) == '#') {
break;
} else if (line.charAt(i) == ' ' && !lastCharSpace) {
lastCharSpace = true;
str.append(line.charAt(i));
} else if (line.charAt(i) == ' ') {
lastCharSpace = true;
} else if (!lastCharSpace) {
str.append(line.charAt(i));
} else {
lastCharSpace = false;
str.append(line.charAt(i));
}
}
// now we're going to loop through again and just delete all the
// extra spaces that might exist at the end of the string
for (int i = str.length() - 1; i >= 0; --i) {
if (str.charAt(str.length() - 1) == ' ') {
str.deleteCharAt(str.length() - 1);
} else {
break;
}
}
return str.toString();
}
/**
* this is called by the pingballServer
*
* @param file - a file
* @return a string representation of the file
*/
public static String fileToString(File file) {
StringBuilder str = new StringBuilder();
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String line;
try {
while ((line = reader.readLine()) != null) {
str.append(line);
str.append("\n");
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return str.toString();
}