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Scala example source code file (Text.scala)

This example Scala source code file (Text.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

atom, atom, illegalargumentexception, string, string, stringbuilder, stringbuilder, text, text

The Scala Text.scala source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2011, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */


package scala.xml

// XXX This attempt to make Text not a case class revealed a bug in the pattern
// matcher (see ticket #2883) so I've put the case back.  (It was/is desirable that
// it not be a case class because it is using the antipattern of passing constructor
// parameters to the superclass where they become vals, but since they will also be
// vals in the subclass, it acquires an underscore to avoid a name clash.)
//
// object Text {
//   def apply(data: String) =
//     if (data != null) new Text(data)
//     else throw new IllegalArgumentException("tried to construct Text with null")
//     
//   def unapply(other: Any): Option[String] = other match {
//     case x: Text  => Some(x.data)
//     case _        => None
//   }
// }

/** The class <code>Text implements an XML node for text (PCDATA).
 *  It is used in both non-bound and bound XML representations.
 *
 *  @author Burak Emir
 *
 *  @param text the text contained in this node, may not be null.
 */
case class Text(_data: String) extends Atom[String](_data)
{
  if (_data == null)
    throw new IllegalArgumentException("tried to construct Text with null")

  /** Returns text, with some characters escaped according to the XML
   *  specification.
   *
   *  @param  sb ...
   *  @return ... 
   */
  override def buildString(sb: StringBuilder) =
    Utility.escape(data, sb)
}

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