| /* |
| * Copyright (c) 2012, Niclas Hedhman. 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.functional; |
| |
| /** |
| * Visitor to visit hierarchies. |
| */ |
| public interface HierarchicalVisitor<NODE, LEAF, ThrowableType extends Throwable> extends Visitor<LEAF, ThrowableType> |
| { |
| /** |
| * Enter an instance of T |
| * |
| * @param visited the visited instance which is now entered |
| * |
| * @return true if the visitor pattern should continue, false if it should be aborted for this level |
| * |
| * @throws ThrowableType if an exception occurred during processing. Any client call that initiated the visiting should |
| * get the exception in order to handle it properly. |
| */ |
| boolean visitEnter( NODE visited ) |
| throws ThrowableType; |
| |
| /** |
| * Leave an instance of T |
| * |
| * @param visited the visited instance which is now left |
| * |
| * @return true if the visitor pattern should continue, false if it should be aborted for the level of this node |
| * |
| * @throws ThrowableType if an exception occurred during processing. Any client call that initiated the visiting should |
| * get the exception in order to handle it properly. |
| */ |
| boolean visitLeave( NODE visited ) |
| throws ThrowableType; |
| |
| @Override |
| boolean visit( LEAF visited ) |
| throws ThrowableType; |
| } |