| package org.apache.commons.ognl; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.Enumeration; |
| |
| /** |
| * This interface defines a method for getting the "elements" of an object, which means any objects that naturally would |
| * be considered to be contained by the object. So for a collection, you would expect this method to return all the |
| * objects in that collection; while for an ordinary object you would expect this method to return just that object. |
| * <p> |
| * An implementation of this interface will often require that its target objects all be of some particular type. For |
| * example, the MapElementsAccessor class requires that its targets all implement the Map interface. |
| */ |
| public interface ElementsAccessor |
| { |
| /** |
| * Returns an iterator over the elements of the given target object. |
| * |
| * @param target the object to get the elements of |
| * @return an iterator over the elements of the given object |
| * @throws OgnlException if there is an error getting the given object's elements |
| */ |
| Enumeration<?> getElements( Object target ) throws OgnlException; |
| } |