1 package org.eclipse.aether.collection; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import org.eclipse.aether.RepositorySystemSession; 23 24 /** 25 * A context used during dependency collection to exchange information within a chain of dependency graph transformers. 26 * 27 * @see DependencyGraphTransformer 28 * @noimplement This interface is not intended to be implemented by clients. 29 * @noextend This interface is not intended to be extended by clients. 30 */ 31 public interface DependencyGraphTransformationContext 32 { 33 34 /** 35 * Gets the repository system session during which the graph transformation happens. 36 * 37 * @return The repository system session, never {@code null}. 38 */ 39 RepositorySystemSession getSession(); 40 41 /** 42 * Gets a keyed value from the context. 43 * 44 * @param key The key used to query the value, must not be {@code null}. 45 * @return The queried value or {@code null} if none. 46 */ 47 Object get( Object key ); 48 49 /** 50 * Puts a keyed value into the context. 51 * 52 * @param key The key used to store the value, must not be {@code null}. 53 * @param value The value to store, may be {@code null} to remove the mapping. 54 * @return The previous value associated with the key or {@code null} if none. 55 */ 56 Object put( Object key, Object value ); 57 58 }