org.argeo.slc.repo/src/org/eclipse/aether/graph/DependencyVisitor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2010, 2011 Sonatype, Inc.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *    Sonatype, Inc. - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.aether.graph;
  12
  13 /**
  14  * A visitor for nodes of the dependency graph.
  15  *
  16  * @see DependencyNode#accept(DependencyVisitor)
  17  */
  18 public interface DependencyVisitor
  19 {
  20
  21     /**
  22      * Notifies the visitor of a node visit before its children have been processed.
  23      *
  24      * @param node The dependency node being visited, must not be {@code null}.
  25      * @return {@code true} to visit child nodes of the specified node as well, {@code false} to skip children.
  26      */
  27     boolean visitEnter( DependencyNode node );
  28
  29     /**
  30      * Notifies the visitor of a node visit after its children have been processed. Note that this method is always
  31      * invoked regardless whether any children have actually been visited.
  32      *
  33      * @param node The dependency node being visited, must not be {@code null}.
  34      * @return {@code true} to visit siblings nodes of the specified node as well, {@code false} to skip siblings.
  35      */
  36     boolean visitLeave( DependencyNode node );
  37
  38 }