Package com.caucho.xsl.fun

Source Code of com.caucho.xsl.fun.UnparsedEntityFun

/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT.  See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*   Free SoftwareFoundation, Inc.
*   59 Temple Place, Suite 330
*   Boston, MA 02111-1307  USA
*
* @author Scott Ferguson
*/

package com.caucho.xsl.fun;

import com.caucho.xpath.Expr;
import com.caucho.xpath.ExprEnvironment;
import com.caucho.xpath.XPathException;
import com.caucho.xpath.XPathFun;
import com.caucho.xpath.pattern.AbstractPattern;

import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Entity;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import java.util.ArrayList;

/**
* The unparsed-entity(...) function.
*/
public class UnparsedEntityFun extends XPathFun {
  /**
   * Evaluate the function.
   *
   * @param pattern The context pattern.
   * @param args The evaluated arguments
   */
  public Object eval(Node node, ExprEnvironment env,
                     AbstractPattern pattern, ArrayList args)
    throws XPathException
  {
    if (args.size() < 1)
      return "";

    String name = Expr.toString(args.get(0));
    Document doc = node.getOwnerDocument();
    DocumentType dtd = doc.getDoctype();
    NamedNodeMap map = dtd.getEntities();
    Entity entity = (Entity) map.getNamedItem(name);
   
    if (entity == null)
      return "";
    else if (entity.getSystemId() != null && ! entity.getSystemId().equals(""))
      return entity.getSystemId();
    else
      return entity.getPublicId();
  }
}
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