001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.util.graph.version;
020
021import org.eclipse.aether.artifact.Artifact;
022import org.eclipse.aether.collection.DependencyCollectionContext;
023import org.eclipse.aether.collection.VersionFilter;
024
025/**
026 * A version filter that blocks "*-SNAPSHOT" versions if the
027 * {@link VersionFilterContext#getDependency()} ancestor whose range is being filtered is not a snapshot.
028 */
029public class ContextualAncestorSnapshotVersionFilter implements VersionFilter {
030    private final SnapshotVersionFilter filter;
031
032    /**
033     * Creates a new instance of this version filter.
034     */
035    public ContextualAncestorSnapshotVersionFilter() {
036        filter = new SnapshotVersionFilter();
037    }
038
039    @Override
040    public void filterVersions(VersionFilterContext context) {
041        Artifact ancestor = context.getDependency().getArtifact();
042        if (!ancestor.isSnapshot()) {
043            filter.filterVersions(context);
044        }
045    }
046
047    @Override
048    public VersionFilter deriveChildFilter(DependencyCollectionContext context) {
049        return this;
050    }
051
052    @Override
053    public boolean equals(Object obj) {
054        if (this == obj) {
055            return true;
056        } else if (null == obj || !getClass().equals(obj.getClass())) {
057            return false;
058        }
059        return true;
060    }
061
062    @Override
063    public int hashCode() {
064        return getClass().hashCode();
065    }
066}