content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE 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.
   *
   *  AndroidIDE 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 AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2004 The Apache Software Foundation.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id: ExsltCommon.java,v 1.2.4.1 2005/09/15 02:45:24 jeffsuttor Exp $
   */
  package jaxp.sun.org.apache.xalan.internal.lib;
  
  import jaxp.sun.org.apache.xalan.internal.extensions.ExpressionContext;
  import jaxp.sun.org.apache.xml.internal.dtm.DTMIterator;
  import jaxp.sun.org.apache.xml.internal.dtm.ref.DTMNodeIterator;
  import jaxp.sun.org.apache.xpath.internal.NodeSet;
  import jaxp.sun.org.apache.xpath.internal.axes.RTFIterator;
  
  /**
   * This class contains EXSLT common extension functions.
   * It is accessed by specifying a namespace URI as follows:
   * <pre>
   *    xmlns:exslt="http://exslt.org/common"
   * </pre>
   *
   * The documentation for each function has been copied from the relevant
   * EXSLT Implementer page.
   *
   * @see <a href="http://www.exslt.org/">EXSLT</a>
   * @xsl.usage general
   */
  public class ExsltCommon
  {
    /**
     * The exsl:object-type function returns a string giving the type of the object passed
     * as the argument. The possible object types are: 'string', 'number', 'boolean',
     * 'node-set', 'RTF', or 'external'.
     *
     * Most XSLT object types can be coerced to each other without error. However, there are
     * certain coercions that raise errors, most importantly treating anything other than a
     * node set as a node set. Authors of utilities such as named templates or user-defined
     * extension functions may wish to give some flexibility in the parameter and argument values
     * that are accepted by the utility; the exsl:object-type function enables them to do so.
     *
     * The Xalan extensions MethodResolver converts 'object-type' to 'objectType'.
     *
     * @param obj The object to be typed.
     * @return objectType 'string', 'number', 'boolean', 'node-set', 'RTF', or 'external'.
     *
     * @see <a href="http://www.exslt.org/">EXSLT</a>
     */
    public static String objectType (Object obj)
    {
      if (obj instanceof String)
        return "string";
      else if (obj instanceof Boolean)
        return "boolean";
      else if (obj instanceof Number)
        return "number";
      else if (obj instanceof DTMNodeIterator)
      {
        DTMIterator dtmI = ((DTMNodeIterator)obj).getDTMIterator();
        if (dtmI instanceof RTFIterator)
          return "RTF";
        else
          return "node-set";
      }
      else
        return "unknown";
    }
  
    /**
     * The exsl:node-set function converts a result tree fragment (which is what you get
     * when you use the content of xsl:variable rather than its select attribute to give
     * a variable value) into a node set. This enables you to process the XML that you create
     * within a variable, and therefore do multi-step processing.
     *
     * You can also use this function to turn a string into a text node, which is helpful
     * if you want to pass a string to a function that only accepts a node set.
     *
     * The Xalan extensions MethodResolver converts 'node-set' to 'nodeSet'.
     *
     * @param myProcessor is passed in by the Xalan extension processor
     * @param rtf The result tree fragment to be converted to a node-set.
     *
     * @return node-set with the contents of the result tree fragment.
     *
     * Note: Already implemented in the xalan namespace as nodeset.
     *
     * @see <a href="http://www.exslt.org/">EXSLT</a>
     */
    public static NodeSet nodeSet(ExpressionContext myProcessor, Object rtf)
    {
      return Extensions.nodeset(myProcessor, rtf);
    }
  
  }
  