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.function.basic;
  
  import com.japisoft.xpath.function.*;
  import com.japisoft.xpath.XPathContext;
  import com.japisoft.xpath.NodeSet;
  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 final class String extends AbstractFunction {
  
  	public String() {
  		super();
  	}
  
  	public Object eval(XPathContext context, FastVector arg) {
  		if (arg.size() == 0) {
  			if (context.getNodeFromContext() == null)
  				return "";
  			else
  				return context.getStringValue(context.getNodeFromContext());
  		} else {
  			Object o = arg.elementAt(0);
  			if (o instanceof Double) {
  				Double d = (Double) o;
  				if (d.isNaN())
  					return "NaN";
  				else if (d.isInfinite())
  					return "Infinity";
  				else {
  					return d.toString();
  				}
  			} else if (o instanceof java.lang.Boolean) {
  				return o.toString();
  			} else if (o instanceof NodeSet) {
  				NodeSet ns = (NodeSet) o;
  				if (ns.size() == 0)
  					return "";
  				else
  					return context.getStringValue(ns.elementAt(0));
  			} else if (o instanceof java.lang.String)
  				return o;
  			else
  				return "";
  		}
  	}
  }
  
  // String ends here
  