| package org.eclipse.aether.internal.impl.collect; |
| |
| /* |
| * 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.ArrayList; |
| import java.util.Collections; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| |
| import org.eclipse.aether.RepositorySystemSession; |
| import org.eclipse.aether.collection.VersionFilter; |
| import org.eclipse.aether.graph.Dependency; |
| import org.eclipse.aether.repository.ArtifactRepository; |
| import org.eclipse.aether.repository.RemoteRepository; |
| import org.eclipse.aether.resolution.VersionRangeResult; |
| import org.eclipse.aether.version.Version; |
| import org.eclipse.aether.version.VersionConstraint; |
| |
| /** |
| * @see DefaultDependencyCollector |
| */ |
| final class DefaultVersionFilterContext |
| implements VersionFilter.VersionFilterContext |
| { |
| |
| private final Iterator<Version> EMPTY = Collections.<Version>emptySet().iterator(); |
| |
| private final RepositorySystemSession session; |
| |
| private Dependency dependency; |
| |
| VersionRangeResult result; |
| |
| int count; |
| |
| byte[] deleted = new byte[64]; |
| |
| DefaultVersionFilterContext( RepositorySystemSession session ) |
| { |
| this.session = session; |
| } |
| |
| public void set( Dependency dependency, VersionRangeResult result ) |
| { |
| this.dependency = dependency; |
| this.result = result; |
| count = result.getVersions().size(); |
| if ( deleted.length < count ) |
| { |
| deleted = new byte[count]; |
| } |
| else |
| { |
| for ( int i = count - 1; i >= 0; i-- ) |
| { |
| deleted[i] = (byte) 0; |
| } |
| } |
| } |
| |
| public List<Version> get() |
| { |
| if ( count == result.getVersions().size() ) |
| { |
| return result.getVersions(); |
| } |
| if ( count <= 1 ) |
| { |
| if ( count <= 0 ) |
| { |
| return Collections.emptyList(); |
| } |
| return Collections.singletonList( iterator().next() ); |
| } |
| List<Version> versions = new ArrayList<Version>( count ); |
| for ( Version version : this ) |
| { |
| versions.add( version ); |
| } |
| return versions; |
| } |
| |
| public RepositorySystemSession getSession() |
| { |
| return session; |
| } |
| |
| public Dependency getDependency() |
| { |
| return dependency; |
| } |
| |
| public VersionConstraint getVersionConstraint() |
| { |
| return result.getVersionConstraint(); |
| } |
| |
| public int getCount() |
| { |
| return count; |
| } |
| |
| public ArtifactRepository getRepository( Version version ) |
| { |
| return result.getRepository( version ); |
| } |
| |
| public List<RemoteRepository> getRepositories() |
| { |
| return Collections.unmodifiableList( result.getRequest().getRepositories() ); |
| } |
| |
| public Iterator<Version> iterator() |
| { |
| return ( count > 0 ) ? new VersionIterator() : EMPTY; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return dependency + " " + result.getVersions(); |
| } |
| |
| private class VersionIterator |
| implements Iterator<Version> |
| { |
| |
| private final List<Version> versions; |
| |
| private final int size; |
| |
| private int count; |
| |
| private int index; |
| |
| private int next; |
| |
| VersionIterator() |
| { |
| count = DefaultVersionFilterContext.this.count; |
| index = -1; |
| next = 0; |
| versions = result.getVersions(); |
| size = versions.size(); |
| advance(); |
| } |
| |
| private void advance() |
| { |
| for ( next = index + 1; next < size && deleted[next] != (byte) 0; next++ ) |
| { |
| // just advancing index |
| } |
| } |
| |
| public boolean hasNext() |
| { |
| return next < size; |
| } |
| |
| public Version next() |
| { |
| if ( count != DefaultVersionFilterContext.this.count ) |
| { |
| throw new ConcurrentModificationException(); |
| } |
| if ( next >= size ) |
| { |
| throw new NoSuchElementException(); |
| } |
| index = next; |
| advance(); |
| return versions.get( index ); |
| } |
| |
| public void remove() |
| { |
| if ( count != DefaultVersionFilterContext.this.count ) |
| { |
| throw new ConcurrentModificationException(); |
| } |
| if ( index < 0 || deleted[index] == (byte) 1 ) |
| { |
| throw new IllegalStateException(); |
| } |
| deleted[index] = (byte) 1; |
| count = --DefaultVersionFilterContext.this.count; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return ( index < 0 ) ? "null" : String.valueOf( versions.get( index ) ); |
| } |
| |
| } |
| |
| } |