1/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the  "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18/*
19 * $Id: ExtensionsProvider.java 468655 2006-10-28 07:12:06Z minchau $
20 */
21package org.apache.xpath;
22
23import java.util.Vector;
24
25import org.apache.xpath.functions.FuncExtFunction;
26
27/**
28 * Interface that XPath objects can call to obtain access to an
29 * ExtensionsTable.
30 *
31 */
32public interface ExtensionsProvider
33{
34  /**
35   * Is the extension function available?
36   */
37
38  public boolean functionAvailable(String ns, String funcName)
39          throws javax.xml.transform.TransformerException;
40
41  /**
42   * Is the extension element available?
43   */
44  public boolean elementAvailable(String ns, String elemName)
45          throws javax.xml.transform.TransformerException;
46
47  /**
48   * Execute the extension function.
49   */
50  public Object extFunction(String ns, String funcName,
51                            Vector argVec, Object methodKey)
52            throws javax.xml.transform.TransformerException;
53
54  /**
55   * Execute the extension function.
56   */
57  public Object extFunction(FuncExtFunction extFunction,
58                            Vector argVec)
59            throws javax.xml.transform.TransformerException;
60}
61