| package org.apache.maven.shared.dependency.tree.traversal; |
| |
| /* |
| * 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 org.apache.maven.shared.dependency.tree.DependencyNode; |
| import org.apache.maven.shared.dependency.tree.filter.DependencyNodeFilter; |
| |
| /** |
| * A dependency node visitor that filters nodes and delegates to another visitor. |
| * |
| * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a> |
| * @version $Id: FilteringDependencyNodeVisitor.java 661727 2008-05-30 14:21:49Z bentmann $ |
| * @since 1.1 |
| */ |
| public class FilteringDependencyNodeVisitor implements DependencyNodeVisitor |
| { |
| // fields ----------------------------------------------------------------- |
| |
| /** |
| * The dependency node visitor to delegate to. |
| */ |
| private final DependencyNodeVisitor visitor; |
| |
| /** |
| * The dependency node filter to apply before delegation. |
| */ |
| private final DependencyNodeFilter filter; |
| |
| // constructors ----------------------------------------------------------- |
| |
| /** |
| * Creates a dependency node visitor that delegates nodes that are accepted by the specified filter to the specified |
| * visitor. |
| * |
| * @param visitor |
| * the dependency node visitor to delegate to |
| * @param filter |
| * the dependency node filter to apply before delegation |
| */ |
| public FilteringDependencyNodeVisitor( DependencyNodeVisitor visitor, DependencyNodeFilter filter ) |
| { |
| this.visitor = visitor; |
| this.filter = filter; |
| } |
| |
| // DependencyNodeVisitor methods ------------------------------------------ |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean visit( DependencyNode node ) |
| { |
| boolean visit; |
| |
| if ( filter.accept( node ) ) |
| { |
| visit = visitor.visit( node ); |
| } |
| else |
| { |
| visit = true; |
| } |
| |
| return visit; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean endVisit( DependencyNode node ) |
| { |
| boolean visit; |
| |
| if ( filter.accept( node ) ) |
| { |
| visit = visitor.endVisit( node ); |
| } |
| else |
| { |
| visit = true; |
| } |
| |
| return visit; |
| } |
| |
| // public methods --------------------------------------------------------- |
| |
| /** |
| * Gets the dependency node visitor that this visitor delegates to. |
| * |
| * @return the dependency node visitor |
| */ |
| public DependencyNodeVisitor getDependencyNodeVisitor() |
| { |
| return visitor; |
| } |
| |
| /** |
| * Gets the dependency node filter that this visitor applies before delegation. |
| * |
| * @return the dependency node filter |
| */ |
| public DependencyNodeFilter getDependencyNodeFilter() |
| { |
| return filter; |
| } |
| } |