package Tokens;

/**

* The class token will always start the parse tree, as it is assumed the java file will

* begin with a class. From here, a new base token is made with the inner code of the

* java class. Many overarching changes must be made to the input code, both before and

* after tokenization and conversion.

*

* @author Keenan Leverty

* @author Peter Matern

* @author Chris Allender

*/

public class ClassToken extends Token {

BaseToken middleToken;

public ClassToken(String input) {

super(input, 0);

// preserve string spaces

input = prepare(input);

// remove all imports

input = input.replaceAll("import.*\\n", "");

// remove whitespace and qualifiers for the class and other variables

input = input.replaceAll("\\s|public|private|protected|static", "");

// new base token to begin tokenization

middleToken = new BaseToken(input.substring(input.indexOf('{') + 1, input.length() - 1), scope);

}

/**

* Simply return the toString of the new base token, replacing the placeholder characters

* inside of the strings with spaces again.

*/

@Override

public String toString() {

return finalChanges(middleToken.toString()).replaceAll("∆", " ");

}

/**

* Changes the spaces in strings to a different character to preserve them.

*

* @param in string to change

* @return string with spaces in strings replaced

*/

private String prepare(String in) {

String result = "";

boolean isInString = false;

for(int i = 0; i < in.length(); i++) {

if(in.charAt(i) == '\"') {

isInString = !isInString;

}

if(isInString && in.charAt(i) == ' ') {

result += '∆';

} else {

result += in.charAt(i);

}

}

return result;

}

/**

* Makes basic python syntax changes to the given string.

* @param in

* @return

*/

private String finalChanges(String in) {

// Correct "true" and "false" syntax

String out = in.replaceAll("true", "True");

out = out.replaceAll("false", "False");

// replace all increments to python equivalent

// ex. i++ -> i += 1

out = out.replaceAll("([\\w\\d])+(\\W)\\2", "$1 $2= 1");

return out;

}

}