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.Lib;
  import com.japisoft.xpath.function.Function;
  import com.japisoft.xpath.XPathContext;
  import com.japisoft.xpath.FastVector;
  import java.util.Hashtable;
  
  /**
  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 FunctionLib extends Hashtable implements Lib {
  
      public FunctionLib() {
  	super();
  	put( "last", Last.class );
  	put( "position", Position.class );
  	put( "count", Count.class );
  	put( "id", Id.class );
  	put( "local-name", LocalName.class );
  	put( "namespace-uri", NamespaceURI.class );
  	put( "name", Name.class );
  	put( "string", String.class );
  	put( "concat", Concat.class );
  	put( "starts-with", StartsWith.class );
  	put( "contains", Contains.class );
  	put( "substring-before", SubStringBefore.class );
  	put( "substring-after", SubStringAfter.class );
  	put( "substring", SubString.class );
  	put( "string-length", StringLength.class );
  	put( "normalize-space", NormalizeSpace.class );
  	put( "translate", Translate.class );
  	put( "boolean", Boolean.class );
  	put( "not", Not.class );
  	put( "true", True.class );
  	put( "false", False.class );
  	put( "lang", Lang.class );
  	put( "number", Number.class );
  	put( "sum", Sum.class );
  	put( "floor", Floor.class );
  	put( "ceiling", Ceiling.class );
  	put( "round", Round.class );
      }
  
      private Hashtable htResolved = null;
  
      /**
       * Eval the function by its name. If the function is
       * unknown a runtime exception is thrown.
       *
       * @param function a <code>String</code> value
       * @param context a <code>XPathContext</code> value
       * @param arg a <code>Vector</code> value
       * @return an <code>Object</code> value
       */
      public Object eval( java.lang.String function, XPathContext context, FastVector arg ) {
  	if ( htResolved == null )
  	    htResolved = new Hashtable();
  	Function f = ( Function )htResolved.get( function );
  	if ( f == null ) {
  	    Class c = ( Class )get( function );
  	    if ( c == null )
  		throw new RuntimeException( "Unknown function " + function );
  	    try {
  		f = ( Function )c.newInstance();
  		htResolved.put( function, f );
  	    } catch( Throwable th ) {
  		throw new RuntimeException( "Can't use " + function );
  	    }
  	}
  	return f.eval( context, arg );
      }
  
  }
  
  // FunctionLib ends here
  