ExtensionsProvider


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: ExtensionsProvider.java,v 1.6 2004/02/17 04:30:02 minchau Exp $
18   */
19  package org.apache.xpath;
20  
21  import java.util.Vector  ;
22  
23  import org.apache.xpath.functions.FuncExtFunction;
24  
25  /**
26   * Interface that XPath objects can call to obtain access to an 
27   * ExtensionsTable.
28   * 
29   */
30  public interface ExtensionsProvider
31  {
32    /**
33     * Is the extension function available?
34     */
35    
36    public boolean functionAvailable(String   ns, String   funcName)
37            throws javax.xml.transform.TransformerException  ;
38    
39    /**
40     * Is the extension element available?
41     */
42    public boolean elementAvailable(String   ns, String   elemName)
43            throws javax.xml.transform.TransformerException  ;
44     
45    /**
46     * Execute the extension function.
47     */
48    public Object   extFunction(String   ns, String   funcName, 
49                              Vector   argVec, Object   methodKey)
50              throws javax.xml.transform.TransformerException  ;
51  
52    /**
53     * Execute the extension function.
54     */
55    public Object   extFunction(FuncExtFunction extFunction, 
56                              Vector   argVec)
57              throws javax.xml.transform.TransformerException  ;
58  }
59
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