/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.jxpath;
import java.util.Set;
/**
* A group of Function objects sharing a common namespace or a set of
* common namespaces. Use the classes
* {@link ClassFunctions ClassFunctions} and
* {@link PackageFunctions PackageFunctions}
* to register extension functions implemented as Java methods.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public interface Functions {
/**
* Returns all namespaces in which this function collection defines
* functions.
* @return Set
*/
Set getUsedNamespaces();
/**
* Returns a Function, if any, for the specified namespace,
* name and parameter types.
* @param namespace ns
* @param name function name
* @param parameters Object[]
* @return Function
*/
Function getFunction(String namespace, String name, Object[] parameters);
}
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