/*
 * Copyright 2002,2004 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.
 */
package org.apache.commons.jelly.xpath;

import org.apache.commons.jelly.TagSupport;

/** An abstract base class useful for implementation inheritence
  *
  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
  * @version $Revision: 1.4 $
  */
public abstract class XPathTagSupport extends TagSupport {

    // Implementation methods
    //-------------------------------------------------------------------------
    protected Object getXPathContext() {
        XPathSource tag = (XPathSource) findAncestorWithClass( XPathSource.class );
        if ( tag != null ) {
            return tag.getXPathSource();
        }
        return null;
    }
}