/*
    * 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.maven.shared.dependency.graph.internal;
  
  import java.util.List;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.model.Exclusion;
  import org.apache.maven.shared.dependency.graph.DependencyNode;
  import org.apache.maven.shared.dependency.graph.traversal.DependencyNodeVisitor;
  
  /**
   * Default implementation of a DependencyNode.
   */
  public class DefaultDependencyNode implements DependencyNode {
      private final Artifact artifact;
  
      private final DependencyNode parent;
  
      private final String premanagedVersion;
  
      private final String premanagedScope;
  
      private final String versionConstraint;
  
      private List<DependencyNode> children;
  
      private Boolean optional;
  
      private List<Exclusion> exclusions;
  
      /**
       * Constructs the DefaultDependencyNode.
       *
       * @param parent            Parent node, may be {@code null}.
       * @param artifact          Artifact associated with this dependency.
       * @param premanagedVersion the premanaged version, may be {@code null}.
       * @param premanagedScope   the premanaged scope, may be {@code null}.
       * @param versionConstraint the version constraint, may be {@code null.}
       */
      public DefaultDependencyNode(
              DependencyNode parent,
              Artifact artifact,
              String premanagedVersion,
              String premanagedScope,
              String versionConstraint) {
          this.parent = parent;
          this.artifact = artifact;
          this.premanagedVersion = premanagedVersion;
          this.premanagedScope = premanagedScope;
          this.versionConstraint = versionConstraint;
      }
  
      public DefaultDependencyNode(
              DependencyNode parent,
              Artifact artifact,
              String premanagedVersion,
              String premanagedScope,
              String versionConstraint,
              Boolean optional,
              List<Exclusion> exclusions) {
          this.parent = parent;
          this.artifact = artifact;
          this.premanagedVersion = premanagedVersion;
          this.premanagedScope = premanagedScope;
          this.versionConstraint = versionConstraint;
          this.optional = optional;
          this.exclusions = exclusions;
      }
  
      // user to refer to winner
      public DefaultDependencyNode(Artifact artifact) {
          this.artifact = artifact;
          this.parent = null;
          this.premanagedScope = null;
          this.premanagedVersion = null;
          this.versionConstraint = null;
      }
  
      /**
       * 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
      */
     @Override
     public boolean accept(DependencyNodeVisitor visitor) {
         if (visitor.visit(this)) {
             for (DependencyNode child : getChildren()) {
                 if (!child.accept(visitor)) {
                     break;
                 }
             }
         }
 
         return visitor.endVisit(this);
     }
 
     /**
      * @return Artifact for this DependencyNode.
      */
     @Override
     public Artifact getArtifact() {
         return artifact;
     }
 
     /**
      *
      * @param children  List of DependencyNode to set as child nodes.
      */
     public void setChildren(List<DependencyNode> children) {
         this.children = children;
     }
 
     /**
      * @return List of child nodes for this DependencyNode.
      */
     @Override
     public List<DependencyNode> getChildren() {
         return children;
     }
 
     /**
      * @return Parent of this DependencyNode.
      */
     @Override
     public DependencyNode getParent() {
         return parent;
     }
 
     @Override
     public String getPremanagedVersion() {
         return premanagedVersion;
     }
 
     @Override
     public String getPremanagedScope() {
         return premanagedScope;
     }
 
     @Override
     public String getVersionConstraint() {
         return versionConstraint;
     }
 
     @Override
     public Boolean getOptional() {
         return optional;
     }
 
     @Override
     public List<Exclusion> getExclusions() {
         return exclusions;
     }
 
     /**
      * @return Stringified representation of this DependencyNode.
      */
     @Override
     public String toNodeString() {
         return artifact + (Boolean.TRUE.equals(optional) ? " (optional)" : "");
     }
 }