content: /*
   *  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
   *
   *      https://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.ivy.core.module.descriptor;
  
  /**
   * A DependencyDescriptorMediator is responsible for dependency descriptor mediation.
   * <p>
   * Dependency descriptor mediation consists in adjusting dependency descriptors according to a
   * context, environment, the stack of dependers, ...
   * </p>
   */
  public interface DependencyDescriptorMediator {
  
      /**
       * Mediates the given {@link DependencyDescriptor} according to this {@link ModuleDescriptor}.
       * <p>
       * This method gives the opportunity to a ModuleDescriptor to override dependency version
       * information of any of its transitive dependencies, since it is called by dependency resolvers
       * before actually resolving a dependency.
       * </p>
       *
       * @param dd
       *            the dependency descriptor which should be mediated.
       * @return the mediated {@link DependencyDescriptor}, or the original
       *         {@link DependencyDescriptor} if no mediation is required by this ModuleDescriptor.
       */
      DependencyDescriptor mediate(DependencyDescriptor dd);
  
  }
  