Source code: org/apache/commons/jxpath/Functions.java
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 package org.apache.commons.jxpath;
17
18 import java.util.Set;
19
20 /**
21 * A group of Function objects sharing a common namespace or a set of
22 * common namespaces. Use the classes
23 * {@link ClassFunctions ClassFunctions} and
24 * {@link PackageFunctions PackageFunctions}
25 * to register extension functions implemented as Java methods.
26 *
27 * @author Dmitri Plotnikov
28 * @version $Revision: 1.7 $ $Date: 2004/02/29 14:17:42 $
29 */
30 public interface Functions {
31
32 /**
33 * Returns all namespaces in which this function collection defines
34 * functions.
35 */
36 Set getUsedNamespaces();
37
38 /**
39 * Returns a Function, if any, for the specified namespace,
40 * name and parameter types.
41 */
42 Function getFunction(String namespace, String name, Object[] parameters);
43 }