Scala example source code file (PrettyWriter.scala)

This example Scala source code file (PrettyWriter.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

array, array, int, int, io, prettywriter, unit, unit, writer, writer

The Scala PrettyWriter.scala source code

package scala.tools.nsc.io

import java.io.Writer

class PrettyWriter(wr: Writer) extends Writer {
  protected val indentStep = "  "
  private var indent = 0
  private def newLine() {
    wr.write('\n')
    wr.write(indentStep * indent)
  }
  def close() = wr.close()
  def flush() = wr.flush()
  def write(str: Array[Char], off: Int, len: Int): Unit = {
    if (off < str.length && off < len) {
      str(off) match {
        case '{' | '[' | '(' => 
          indent += 1
          wr.write(str(off))
          newLine()
          wr.write(str, off + 1, len - 1)
        case '}' | ']' | ')' =>
          wr.write(str, off, len)
          indent -= 1
        case ',' =>
          wr.write(',')
          newLine()
          wr.write(str, off + 1, len - 1)
        case ':' =>
          wr.write(':')
          wr.write(' ')
          wr.write(str, off + 1, len - 1)
        case _ =>
          wr.write(str, off, len)
      } 
    } else {
      wr.write(str, off, len)
    }
  }
  override def toString = wr.toString
}