/*
    * 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.eclipse.aether.util.artifact;
  
  import java.io.File;
  import java.util.Map;
  
  import org.eclipse.aether.artifact.AbstractArtifact;
  import org.eclipse.aether.artifact.Artifact;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * An artifact that delegates to another artifact instance. This class serves as a base for subclasses that want to
   * carry additional data fields.
   */
  public abstract class DelegatingArtifact extends AbstractArtifact {
  
      private final Artifact delegate;
  
      /**
       * Creates a new artifact instance that delegates to the specified artifact.
       *
       * @param delegate The artifact to delegate to, must not be {@code null}.
       */
      protected DelegatingArtifact(Artifact delegate) {
          this.delegate = requireNonNull(delegate, "delegate artifact cannot be null");
      }
  
      /**
       * Creates a new artifact instance that delegates to the specified artifact. Subclasses should use this hook to
       * instantiate themselves, taking along any data from the current instance that was added.
       *
       * @param delegate The artifact to delegate to, must not be {@code null}.
       * @return The new delegating artifact, never {@code null}.
       */
      protected abstract DelegatingArtifact newInstance(Artifact delegate);
  
      public String getGroupId() {
          return delegate.getGroupId();
      }
  
      public String getArtifactId() {
          return delegate.getArtifactId();
      }
  
      public String getVersion() {
          return delegate.getVersion();
      }
  
      public Artifact setVersion(String version) {
          Artifact artifact = delegate.setVersion(version);
          if (artifact != delegate) {
              return newInstance(artifact);
          }
          return this;
      }
  
      public String getBaseVersion() {
          return delegate.getBaseVersion();
      }
  
      public boolean isSnapshot() {
          return delegate.isSnapshot();
      }
  
      public String getClassifier() {
          return delegate.getClassifier();
      }
  
      public String getExtension() {
          return delegate.getExtension();
      }
  
      public File getFile() {
          return delegate.getFile();
      }
  
      public Artifact setFile(File file) {
          Artifact artifact = delegate.setFile(file);
          if (artifact != delegate) {
              return newInstance(artifact);
          }
         return this;
     }
 
     public String getProperty(String key, String defaultValue) {
         return delegate.getProperty(key, defaultValue);
     }
 
     public Map<String, String> getProperties() {
         return delegate.getProperties();
     }
 
     public Artifact setProperties(Map<String, String> properties) {
         Artifact artifact = delegate.setProperties(properties);
         if (artifact != delegate) {
             return newInstance(artifact);
         }
         return this;
     }
 
     @Override
     public boolean equals(Object obj) {
         if (obj == this) {
             return true;
         }
 
         if (obj instanceof DelegatingArtifact) {
             return delegate.equals(((DelegatingArtifact) obj).delegate);
         }
 
         return delegate.equals(obj);
     }
 
     @Override
     public int hashCode() {
         return delegate.hashCode();
     }
 
     @Override
     public String toString() {
         return delegate.toString();
     }
 }