| /* |
| * 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.configuration2.tree; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * <p> |
| * An abstract base class for decorators of a {@code NodeHandler}. |
| * </p> |
| * <p> |
| * This class implements all methods of the {@code NodeHandler} interface by |
| * delegating to another instance. This is convenient if specific functionality |
| * of a {@code NodeHandler} is to be adapted for a special use case. Concrete |
| * sub classes have to implement the {@code getDecoratedNodeHandler()} method to |
| * provide the underlying handler. |
| * </p> |
| * |
| * @version $Id$ |
| * @since 2.0 |
| * @param <T> the type of the nodes supported by this handler |
| */ |
| public abstract class NodeHandlerDecorator<T> implements NodeHandler<T> |
| { |
| @Override |
| public String nodeName(T node) |
| { |
| return getDecoratedNodeHandler().nodeName(node); |
| } |
| |
| @Override |
| public Object getValue(T node) |
| { |
| return getDecoratedNodeHandler().getValue(node); |
| } |
| |
| @Override |
| public T getParent(T node) |
| { |
| return getDecoratedNodeHandler().getParent(node); |
| } |
| |
| @Override |
| public List<T> getChildren(T node) |
| { |
| return getDecoratedNodeHandler().getChildren(node); |
| } |
| |
| @Override |
| public <C> List<T> getMatchingChildren(T node, NodeMatcher<C> matcher, |
| C criterion) |
| { |
| return getDecoratedNodeHandler().getMatchingChildren(node, matcher, |
| criterion); |
| } |
| |
| @Override |
| public <C> int getMatchingChildrenCount(T node, NodeMatcher<C> matcher, |
| C criterion) |
| { |
| return getDecoratedNodeHandler().getMatchingChildrenCount(node, |
| matcher, criterion); |
| } |
| |
| @Override |
| public List<T> getChildren(T node, String name) |
| { |
| return getDecoratedNodeHandler().getChildren(node, name); |
| } |
| |
| @Override |
| public T getChild(T node, int index) |
| { |
| return getDecoratedNodeHandler().getChild(node, index); |
| } |
| |
| @Override |
| public int indexOfChild(T parent, T child) |
| { |
| return getDecoratedNodeHandler().indexOfChild(parent, child); |
| } |
| |
| @Override |
| public int getChildrenCount(T node, String name) |
| { |
| return getDecoratedNodeHandler().getChildrenCount(node, name); |
| } |
| |
| @Override |
| public Set<String> getAttributes(T node) |
| { |
| return getDecoratedNodeHandler().getAttributes(node); |
| } |
| |
| @Override |
| public boolean hasAttributes(T node) |
| { |
| return getDecoratedNodeHandler().hasAttributes(node); |
| } |
| |
| @Override |
| public Object getAttributeValue(T node, String name) |
| { |
| return getDecoratedNodeHandler().getAttributeValue(node, name); |
| } |
| |
| @Override |
| public boolean isDefined(T node) |
| { |
| return getDecoratedNodeHandler().isDefined(node); |
| } |
| |
| @Override |
| public T getRootNode() |
| { |
| return getDecoratedNodeHandler().getRootNode(); |
| } |
| |
| /** |
| * Returns the {@code NodeHandler} object that is decorated by this |
| * instance. All method calls are delegated to this object. |
| * |
| * @return the decorated {@code NodeHandler} |
| */ |
| protected abstract NodeHandler<T> getDecoratedNodeHandler(); |
| } |