Scala example source code file (VirtualFile.scala)

This example Scala source code file (VirtualFile.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

abstractfile, abstractfile, boolean, boolean, bytearrayinputstream, bytearrayoutputstream, io, iterator, jfile, long, long, option, string, string, virtualfile

The Scala VirtualFile.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 LAMP/EPFL
 * @author  Martin Odersky
 */


package scala.tools.nsc
package io

import java.io.{ ByteArrayInputStream, ByteArrayOutputStream, InputStream, OutputStream }

/** This class implements an in-memory file.
 *
 *  @author  Philippe Altherr
 *  @version 1.0, 23/03/2004
 */
class VirtualFile(val name: String, override val path: String) extends AbstractFile {
  /**
   * Initializes this instance with the specified name and an
   * identical path.
   *
   * @param name the name of the virtual file to be created
   * @return     the created virtual file
   */
  def this(name: String) = this(name, name)
  
  override def hashCode = path.hashCode
  override def equals(that: Any) = that match {
    case x: VirtualFile => x.path == path
    case _              => false
  }

  //########################################################################
  // Private data
  private var content = new Array[Byte](0)
    
  //########################################################################
  // Public Methods
  def absolute = this

  /** Returns null. */
  final def file: JFile = null
  
  override def sizeOption: Option[Int] = Some(content.size)
  
  def input : InputStream = new ByteArrayInputStream(content);
  
  override def output: OutputStream = {
    new ByteArrayOutputStream() {
      override def close() {
        super.close()
        content = toByteArray()
      }
    }
  }
  
  def container: AbstractFile =  unsupported

  /** Is this abstract file a directory? */
  def isDirectory: Boolean = false

  /** Returns the time that this abstract file was last modified. */
  private var _lastModified: Long = 0
  def lastModified: Long = _lastModified
  def lastModified_=(x: Long) = _lastModified = x

  /** Returns all abstract subfiles of this abstract directory. */
  def iterator: Iterator[AbstractFile] = {
    assert(isDirectory, "not a directory '" + this + "'")
    Iterator.empty
  }	

  /** Does this abstract file denote an existing file? */
  def create() { unsupported }

  /** Delete the underlying file or directory (recursively). */
  def delete() { unsupported }

  /**
   * Returns the abstract file in this abstract directory with the
   * specified name. If there is no such file, returns null. The
   * argument "directory" tells whether to look for a directory or
   * or a regular file.
   *
   * @param name      ...
   * @param directory ...
   * @return          ...
   */
  def lookupName(name: String, directory: Boolean): AbstractFile = {
    assert(isDirectory, "not a directory '" + this + "'")
    null
  }

  /** Returns an abstract file with the given name. It does not
   *  check that it exists.
   */
  def lookupNameUnchecked(name: String, directory: Boolean) = unsupported

  //########################################################################
}