Refactoring of Parser.java

Parser.java

@@ -1,42 +1,66 @@
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.FileWriter;
 import java.io.IOException;
+
 /**
- * This class is thread safe.
+ * The Parser class takes a text @see { java.io.File } as constructor argument and allows to read it as a String.
+ * It also Allows to write a String literal to the file
+ *
  */
 public class Parser {
-  private File file;
-  public synchronized void setFile(File f) {
-    file = f;
+
+  private final File file;
+
+  public Parser(File file){
+	  this.file = file;
   }
-  public synchronized File getFile() {
+
+  public File getFile() {
     return file;
   }
+
+  /**
+   * Convenience method that returns the String content of a text file including only Unicode characters in the ASCII range
+   * @return String containing the value of the text file
+   * @throws IOException
+   */
   public String getContent() throws IOException {
-    FileInputStream i = new FileInputStream(file);
-    String output = "";
-    int data;
-    while ((data = i.read()) > 0) {
-      output += (char) data;
-    }
-    return output;
+	  return getContent(false);
   }
-  public String getContentWithoutUnicode() throws IOException {
-    FileInputStream i = new FileInputStream(file);
-    String output = "";
-    int data;
-    while ((data = i.read()) > 0) {
-      if (data < 0x80) {
-        output += (char) data;
-      }
-    }
-    return output;
+
+  /**
+   * This method that reads a file as a text file, including the Unicode characters outside the ASCII range or not.
+   * @param includeAscii Optional parameter that allows to include or exclude Unicode characters in the ASCII range in the result
+   * @return String containing the value of the text file
+   * @throws IOException
+   */
+  public String getContent(boolean includeAscii) throws IOException {
+	  StringBuilder sb = new StringBuilder();
+	  try(BufferedReader br = new BufferedReader(new FileReader(file))){
+		  String line;
+		  while ((line = br.readLine()) != null){
+			  if (!includeAscii){
+				  sb.append(line.chars().filter(c -> c > 0x80));
+			  } else {
+				  sb.append(line);
+			  }
+		  }
+	  }
+	  return sb.toString();
   }
+
+  /**
+   * Saves the provided String to the file
+   * @param content The String to be saved to the file
+   * @throws IOException
+   */
   public void saveContent(String content) throws IOException {
-    FileOutputStream o = new FileOutputStream(file);
-    for (int i = 0; i < content.length(); i += 1) {
-      o.write(content.charAt(i));
-    }
+	  try(BufferedWriter bw = new BufferedWriter(new FileWriter(file))){
+		  bw.write(content);
+	  }
   }
+
 }