| /* |
| * Copyright (c) 2007, Rickard Öberg. All Rights Reserved. |
| * |
| * Licensed 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.zest.api.association; |
| |
| import org.apache.zest.api.entity.EntityReference; |
| |
| /** |
| * Association to a single EntityComposite. |
| */ |
| public interface Association<T> extends AbstractAssociation |
| { |
| /** |
| * Get the associated entity. |
| * |
| * @return the associated entity |
| */ |
| T get(); |
| |
| /** |
| * Set the associated entity. |
| * |
| * @param associated the entity |
| * |
| * @throws IllegalArgumentException thrown if the entity is not a valid reference for this association |
| * @throws IllegalStateException thrown if association is immutable |
| */ |
| void set( T associated ) |
| throws IllegalArgumentException, IllegalStateException; |
| |
| /** |
| * @return the the reference of the associated entity. |
| */ |
| EntityReference reference(); |
| } |