1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.jxpath;
19
20 import java.util.Set;
21
22 /**
23 * A group of Function objects sharing a common namespace or a set of common namespaces. Use the classes {@link ClassFunctions ClassFunctions} and
24 * {@link PackageFunctions PackageFunctions} to register extension functions implemented as Java methods.
25 */
26 public interface Functions {
27
28 /**
29 * Gets a Function, if any, for the specified namespace, name and parameter types.
30 *
31 * @param namespace ns
32 * @param name function name
33 * @param parameters Object[]
34 * @return Function
35 */
36 Function getFunction(String namespace, String name, Object[] parameters);
37
38 /**
39 * Gets all namespaces in which this function collection defines functions.
40 *
41 * @return all namespaces in which this function collection defines functions.
42 */
43 Set<String> getUsedNamespaces();
44 }