View Javadoc

    1   /*
    2    * Copyright 2002,2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.jelly.xpath;
    17
    18  import org.apache.commons.jelly.TagSupport;
    19
    20  /*** An abstract base class useful for implementation inheritence
    21    *
    22    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
    23    * @version $Revision: 155420 $
    24    */
    25  public abstract class XPathTagSupport extends TagSupport {
    26
    27      // Implementation methods
    28      //-------------------------------------------------------------------------
    29      protected Object getXPathContext() {
    30          XPathSource tag = (XPathSource) findAncestorWithClass( XPathSource.class );
    31          if ( tag != null ) {
    32              return tag.getXPathSource();
    33          }
    34          return null;
    35      }
    36  }