org.apache.xpath.objects.XObjectFactory Maven / Gradle / Ivy
/*
* 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.
*/
/*
* $Id: XObjectFactory.java 468655 2006-10-28 07:12:06Z minchau $
*/
package org.apache.xpath.objects;
import org.apache.xml.dtm.Axis;
import org.apache.xml.dtm.DTM;
import org.apache.xml.dtm.DTMAxisIterator;
import org.apache.xml.dtm.DTMIterator;
import org.apache.xpath.XPathContext;
import org.apache.xpath.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 can 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 org.apache.xml.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 org.apache.xml.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;
}
}