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circus/src/jcircus/util/CodeFormatting.java
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package jcircus.util;
/*
* CodeFormatting.java
*
* Formats an unformatted code in order to make it more readable
* Created on 15 March 2005, 13:53
* @author Marcel Oliveira
*/
import java.util.StringTokenizer;
import java.io.File;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
public class CodeFormatting {
public static String SEQUENCE = ";";
public static String OPEN_BLOCK = "{";
public static String CLOSE_BLOCK = "}";
public static String LINE_BREAK = "
";
public static String TAB = "\t";
/*
* Insert a given string after a given symbol
*/
private static String insertString(String input, String insertString, String afterString){
String output = "";
StringTokenizer tokenizer = new StringTokenizer(input,afterString,true);
while(tokenizer.hasMoreTokens()){
String next = tokenizer.nextToken();
if(next.equals(afterString)){
output = output + next + insertString;
} else {
output = output + next.trim();
}
}
return output;
}
/*
* Insert line breaks after a given symbol
*/
private static String insertLineBreaks(String input, String afterString){
return insertString(input, LINE_BREAK, afterString);
}
/*
* Counts how many times c happens in str
*/
private static int count(char c, String str) {
int count = 0;
for(int i=0; i<str.length(); i++){
if(str.charAt(i) == c) {
count++;
}
}
return count;
}
/*
* Returns a string containing n characters c
*/
private static String repeat(char c, int n) {
String output = "";
for(int i=0; i<n; i++){
output = output + c;
}
return output;
}
/*
* Insert tabs after a given symbol
*/
private static String insertTabs(String input){
String output = "";
String done = "";
String toDo = "";
StringTokenizer tokenizer = new StringTokenizer(input,LINE_BREAK,true);
while(tokenizer.hasMoreTokens()){
String next = tokenizer.nextToken();
done = done + next;
if(next.equals(LINE_BREAK)){
int numberOfOpenBlocks = count(OPEN_BLOCK.charAt(0),done);
int numberOfCloseBlocks = count(CLOSE_BLOCK.charAt(0),done);
int numberOfTabs = numberOfOpenBlocks - numberOfCloseBlocks;
output = output + next + repeat(TAB.charAt(0),numberOfTabs);
} else {
output = output + next.trim();
}
}
// Removing extra tabs that were inserted before closing blocks
output = output.replaceAll(TAB+CLOSE_BLOCK,CLOSE_BLOCK);
return output;
/*
String correctOutput = "";
tokenizer = new StringTokenizer(output,CLOSE_BLOCK,true);
while(tokenizer.hasMoreTokens()){
String next = tokenizer.nextToken();
if(next.equals(CLOSE_BLOCK)){
correctOutput = correctOutput + next;
} else {
correctOutput = correctOutput + next.substring(0,next.length()-1);
}
}
return correctOutput;
*/
}
public static String format(String input){
String output = input;
if (input != null) {
output = output.replaceAll(LINE_BREAK,"");
output = insertLineBreaks(output,OPEN_BLOCK);
output = insertLineBreaks(output,CLOSE_BLOCK);
output = insertLineBreaks(output,SEQUENCE);
output = insertTabs(output);
}
return output;
}
public static void main(String args[]){
String input = "";
BufferedReader reader = null;
String line;
try {
reader = new BufferedReader(new FileReader(new File("source.txt")));
line = reader.readLine();
while (line != null) {
input = input + line + CodeFormatting.LINE_BREAK;
line = reader.readLine();
}
} catch (FileNotFoundException fnfe) {
fnfe.printStackTrace();
} catch (IOException io) {
io.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException exception) {
exception.printStackTrace();
}
}
}
String output = CodeFormatting.format(input);
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new FileWriter(new File("target.txt")));
writer.write(output);
} catch (FileNotFoundException fnfe) {
fnfe.printStackTrace();
} catch (IOException io) {
io.printStackTrace();
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException exception) {
exception.printStackTrace();
}
}
}
}
}
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