How to use

CodeBuffer

in

org.sonar.channel

/**
 * Returns the character at the specified index after the cursor without consuming it
 * 
 * @param index
 *          the relative index of the character to be returned
 * @return the desired character
 * @see java.lang.CharSequence#charAt(int)
 */
public final char charAt(int index) {
 return (char)intAt(index);
}

private void updateCursorPosition(int character) {
 // see Java Language Specification : http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.4
 if (character == LF || (character == CR && peek() != LF)) {
  cursor.line++;
  cursor.column = 0;
 } else if (character == '\t') {
  cursor.column += tabWidth;
 } else {
  cursor.column++;
 }
}

/**
 * Read and consume the next character
 * 
 * @return the next character or -1 if the end of the stream is reached
 */
public final int pop() {
 if (bufferPosition >= buffer.length) {
  return -1;
 }
 int character = buffer[bufferPosition++];
 updateCursorPosition(character);
 if (recordingMode) {
  recordedCharacters.append((char)character);
 }
 lastChar = character;
 return character;
}

/**
 * Looks at the next character without consuming it
 * 
 * @return the next character or -1 if the end of the stream has been reached
 */
public final int peek() {
 return intAt(0);
}

@Override
public final String toString() {
 StringBuilder result = new StringBuilder();
 result.append("CodeReader(");
 result.append("line:").append(cursor.line);
 result.append("|column:").append(cursor.column);
 result.append("|cursor value:'").append((char) peek()).append("'");
 result.append(")");
 return result.toString();
}