WhitespaceStrippingElementMatcher


1   /*
2    * Copyright 1999-2004 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  /*
17   * $Id: WhitespaceStrippingElementMatcher.java,v 1.4 2004/02/17 04:30:02 minchau Exp $
18   */
19  package org.apache.xpath;
20  
21  import javax.xml.transform.TransformerException  ;
22  
23  import org.w3c.dom.Element  ;
24  
25  /**
26   * A class that implements this interface can tell if a given element should 
27   * strip whitespace nodes from it's children.
28   */
29  public interface WhitespaceStrippingElementMatcher
30  {
31    /**
32     * Get information about whether or not an element should strip whitespace.
33     * @see <a HREF="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
34     *
35     * @param support The XPath runtime state.
36     * @param targetElement Element to check
37     *
38     * @return true if the whitespace should be stripped.
39     *
40     * @throws TransformerException
41     */
42    public boolean shouldStripWhiteSpace(
43            XPathContext support, Element   targetElement) throws TransformerException  ;
44    
45    /**
46     * Get information about whether or not whitespace can be stripped.
47     * @see <a HREF="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
48     *
49     * @return true if the whitespace can be stripped.
50     */
51    public boolean canStripWhiteSpace();
52  }
53
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