code: /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xpath;
  
  import javax.xml.transform.TransformerException;
  
  import org.w3c.dom.Element;
  
  /**
   * A class that implements this interface can tell if a given element should 
   * strip whitespace nodes from it's children.
   */
  public interface WhitespaceStrippingElementMatcher
  {
    /**
     * Get information about whether or not an element should strip whitespace.
     * @see <a href="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
     *
     * @param support The XPath runtime state.
     * @param targetElement Element to check
     *
     * @return true if the whitespace should be stripped.
     *
     * @throws TransformerException
     */
    public boolean shouldStripWhiteSpace(
            XPathContext support, Element targetElement) throws TransformerException;
    
    /**
     * Get information about whether or not whitespace can be stripped.
     * @see <a href="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
     *
     * @return true if the whitespace can be stripped.
     */
    public boolean canStripWhiteSpace();
  }
  