package org.apache.maven.shared.dependency.graph;

 /*

  * 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 java.util.List;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.shared.dependency.graph.traversal.DependencyNodeVisitor;

 /**

  * Represents an artifact node within a Maven project's dependency graph.

  *

  * @author Hervé Boutemy

  * @since 2.0

  */

 public interface DependencyNode

 {

     Artifact getArtifact();

     List<DependencyNode> getChildren();

     /**

      * Applies the specified dependency node visitor to this dependency node and its children.

      * 

      * @param visitor

      *            the dependency node visitor to use

      * @return the visitor result of ending the visit to this node

      * @since 1.1

      */

     boolean accept( DependencyNodeVisitor visitor );

     /**

      * Gets the parent dependency node of this dependency node.

      * 

      * @return the parent dependency node

      */

     DependencyNode getParent();

     /**

      * Gets the version or version range for the dependency before dependency management was applied (if any).

      * 

      * @return The dependency version before dependency management or {@code null} if the version was not managed.

      */

     String getPremanagedVersion();

     /**

      * Gets the scope for the dependency before dependency management was applied (if any).

      * 

      * @return The dependency scope before dependency management or {@code null} if the scope was not managed.

      */

     String getPremanagedScope();

     /**

      * A constraint on versions for a dependency. A constraint can either consist of one or more version ranges or a

      * single version.

      * 

      * @return The constraint on the dependency.

      */

     String getVersionConstraint();

     /**

      * Returns a string representation of this dependency node.

      * 

      * @return the string representation

      */

     String toNodeString();

 }