content: // (c) ALEXANDRE BRILLANT : http://www.japisoft.com
  // All this work is confidential, you have rights to
  // change and evolve it for your products but you
  // have no rights to sell it, propose concurrent works.
  // Morever any changes to bugs or evolutions should
  // be send to JAPISOFT that needs to maintain a
  // valid version and has all rights on the product.
  
  
  package com.japisoft.xpath.node;
  
  import com.japisoft.xpath.*;
  import com.japisoft.xpath.function.Lib;
  import com.japisoft.xpath.FastVector;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class Function extends Expr {
      public Function() {
  	super();
      }
  
      public String functionName;
  
      public void setName( String functionName ) {
  	this.functionName = functionName;
      }
  
      public String getName() {
  	return functionName;
      }
  
      public Object eval( XPathContext context ) {
  	// Eval every parameter
  	FastVector arg = new FastVector();
  	// Save the current NodeSet and location
  	int l = context.getContextPosition();
  	NodeSet ns = context.getContextNodeSet();
  
  	for ( int i = 0; i < getNodeCount(); i++ ) {
  	    AbstractNode n = ( AbstractNode )getNodeAt( i );
  
  	    if ( i > 0 ) {
  		context.setContextNodeSet( ns );
  		context.setContextPosition( l );
  	    }
  
  	    arg.addElement( n.eval( context ) );
  	}
  
  	// Reset the context
  	if ( getNodeCount() > 0 ) {
  	    context.setContextNodeSet( ns );
  	    context.setContextPosition( l );
  	}
  
  	Lib lib = context.getLibrary();
  	return lib.eval( getName(), context, arg );
      }
  
  }
  
  // Function ends here
  