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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2006, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.xml;
import compat.StringBuilder
/** an XML node for processing instructions (PI)
*
* @author Burak Emir
* @param target target name of this PI
* @param text text contained in this node, may not contain "?>"
**/
case class ProcInstr(target:String, proctext:String) extends SpecialNode {
if( !Utility.isName( target ) )
throw new IllegalArgumentException(target+" must be an XML Name");
else if( text.indexOf("?>" ) != -1 )
throw new IllegalArgumentException(proctext+" may not contain \"?>\"");
final override def typeTag$:Int = -2;
val z:Seq[Char] = Predef.string2seq(target); z match {
case Seq('X'|'x','M'|'m','L'|'l') =>
throw new IllegalArgumentException(target+" is reserved");
case _ =>
}
/** structural equality */
override def equals(x: Any): Boolean = x match {
case ProcInstr(x,y) => x.equals(target) && y.equals(proctext);
case _ => false
}
/** the constant "#PI" */
final def label = "#PI";
/** hashcode for this PI */
override def hashCode() = target.hashCode() * 7 + proctext.hashCode();
override def text = "";
/** appends "<?" target (" "+text)?+"?>"
* to this stringbuffer.
*/
override def toString(sb: StringBuilder) = {
sb
.append("<?")
.append(target);
if( proctext.length() > 0 ) {
sb
.append(' ')
.append(proctext);
};
sb.append("?>");
}
}
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