Merge tag 'v2.3.20' into testing

[gpl/argeo-jcr.git] / org.argeo.slc.repo / src / org / eclipse / aether / graph / DependencyVisitor.java

diff --git a/org.argeo.slc.repo/src/org/eclipse/aether/graph/DependencyVisitor.java b/org.argeo.slc.repo/src/org/eclipse/aether/graph/DependencyVisitor.java
new file mode 100644 (file)
index 0000000..d4ba213
--- /dev/null
+++ b/org.argeo.slc.repo/src/org/eclipse/aether/graph/DependencyVisitor.java
@@ -0,0 +1,38 @@
+/*******************************************************************************
+ * Copyright (c) 2010, 2011 Sonatype, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Sonatype, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.aether.graph;
+
+/**
+ * A visitor for nodes of the dependency graph.
+ * 
+ * @see DependencyNode#accept(DependencyVisitor)
+ */
+public interface DependencyVisitor
+{
+
+    /**
+     * Notifies the visitor of a node visit before its children have been processed.
+     * 
+     * @param node The dependency node being visited, must not be {@code null}.
+     * @return {@code true} to visit child nodes of the specified node as well, {@code false} to skip children.
+     */
+    boolean visitEnter( DependencyNode node );
+
+    /**
+     * Notifies the visitor of a node visit after its children have been processed. Note that this method is always
+     * invoked regardless whether any children have actually been visited.
+     * 
+     * @param node The dependency node being visited, must not be {@code null}.
+     * @return {@code true} to visit siblings nodes of the specified node as well, {@code false} to skip siblings.
+     */
+    boolean visitLeave( DependencyNode node );
+
+}