| package org.eclipse.aether.util.graph.transformer; |
| |
| /* |
| * 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.Collection; |
| |
| import org.eclipse.aether.RepositoryException; |
| import org.eclipse.aether.util.graph.transformer.ConflictResolver.ConflictContext; |
| import org.eclipse.aether.util.graph.transformer.ConflictResolver.ConflictItem; |
| import org.eclipse.aether.util.graph.transformer.ConflictResolver.OptionalitySelector; |
| |
| /** |
| * An optionality selector for use with {@link ConflictResolver}. In general, this selector only marks a dependency as |
| * optional if all its occurrences are optional. If however a direct dependency is involved, its optional flag is |
| * selected. |
| */ |
| public final class SimpleOptionalitySelector |
| extends OptionalitySelector |
| { |
| |
| /** |
| * Creates a new instance of this optionality selector. |
| */ |
| public SimpleOptionalitySelector() |
| { |
| } |
| |
| @Override |
| public void selectOptionality( ConflictContext context ) |
| throws RepositoryException |
| { |
| boolean optional = chooseEffectiveOptionality( context.getItems() ); |
| context.setOptional( optional ); |
| } |
| |
| private boolean chooseEffectiveOptionality( Collection<ConflictItem> items ) |
| { |
| boolean optional = true; |
| for ( ConflictItem item : items ) |
| { |
| if ( item.getDepth() <= 1 ) |
| { |
| return item.getDependency().isOptional(); |
| } |
| if ( ( item.getOptionalities() & ConflictItem.OPTIONAL_FALSE ) != 0 ) |
| { |
| optional = false; |
| } |
| } |
| return optional; |
| } |
| |
| } |