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 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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.

 */

package com.sun.org.apache.xpath.internal.objects;

import com.sun.org.apache.xml.internal.dtm.Axis;

import com.sun.org.apache.xml.internal.dtm.DTM;

import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;

import com.sun.org.apache.xml.internal.dtm.DTMIterator;

import com.sun.org.apache.xpath.internal.XPathContext;

import com.sun.org.apache.xpath.internal.axes.OneStepIterator;

public class XObjectFactory

{

  /**

   * Create the right XObject based on the type of the object passed.  This

   * function can not make an XObject that exposes DOM Nodes, NodeLists, and

   * NodeIterators to the XSLT stylesheet as node-sets.

   *

   * @param val The java object which this object will wrap.

   *

   * @return the right XObject based on the type of the object passed.

   */

  static public XObject create(Object val)

  {

    XObject result;

    if (val instanceof XObject)

    {

      result = (XObject) val;

    }

    else if (val instanceof String)

    {

      result = new XString((String) val);

    }

    else if (val instanceof Boolean)

    {

      result = new XBoolean((Boolean)val);

    }

    else if (val instanceof Double)

    {

      result = new XNumber(((Double) val));

    }

    else

    {

      result = new XObject(val);

    }

    return result;

  }

  /**

   * Create the right XObject based on the type of the object passed.

   * This function <emph>can</emph> make an XObject that exposes DOM Nodes, NodeLists, and

   * NodeIterators to the XSLT stylesheet as node-sets.

   *

   * @param val The java object which this object will wrap.

   * @param xctxt The XPath context.

   *

   * @return the right XObject based on the type of the object passed.

   */

  static public XObject create(Object val, XPathContext xctxt)

  {

    XObject result;

    if (val instanceof XObject)

    {

      result = (XObject) val;

    }

    else if (val instanceof String)

    {

      result = new XString((String) val);

    }

    else if (val instanceof Boolean)

    {

      result = new XBoolean((Boolean)val);

    }

    else if (val instanceof Number)

    {

      result = new XNumber(((Number) val));

    }

    else if (val instanceof DTM)

    {

      DTM dtm = (DTM)val;

      try

      {

        int dtmRoot = dtm.getDocument();

        DTMAxisIterator iter = dtm.getAxisIterator(Axis.SELF);

        iter.setStartNode(dtmRoot);

        DTMIterator iterator = new OneStepIterator(iter, Axis.SELF);

        iterator.setRoot(dtmRoot, xctxt);

        result = new XNodeSet(iterator);

      }

      catch(Exception ex)

      {

        throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(ex);

      }

    }

    else if (val instanceof DTMAxisIterator)

    {

      DTMAxisIterator iter = (DTMAxisIterator)val;

      try

      {

        DTMIterator iterator = new OneStepIterator(iter, Axis.SELF);

        iterator.setRoot(iter.getStartNode(), xctxt);

        result = new XNodeSet(iterator);

      }

      catch(Exception ex)

      {

        throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(ex);

      }

    }

    else if (val instanceof DTMIterator)

    {

      result = new XNodeSet((DTMIterator) val);

    }

    // This next three instanceofs are a little worrysome, since a NodeList

    // might also implement a Node!

    else if (val instanceof org.w3c.dom.Node)

    {

      result = new XNodeSetForDOM((org.w3c.dom.Node)val, xctxt);

    }

    // This must come after org.w3c.dom.Node, since many Node implementations

    // also implement NodeList.

    else if (val instanceof org.w3c.dom.NodeList)

    {

      result = new XNodeSetForDOM((org.w3c.dom.NodeList)val, xctxt);

    }

    else if (val instanceof org.w3c.dom.traversal.NodeIterator)

    {

      result = new XNodeSetForDOM((org.w3c.dom.traversal.NodeIterator)val, xctxt);

    }

    else

    {

      result = new XObject(val);

    }

    return result;

  }

}