| package org.eclipse.aether.util.version; |
| |
| /* |
| * 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.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.aether.version.Version; |
| import org.eclipse.aether.version.VersionRange; |
| |
| /** |
| * A union of version ranges. |
| */ |
| final class UnionVersionRange |
| implements VersionRange |
| { |
| |
| private final Set<VersionRange> ranges; |
| |
| private final Bound lowerBound; |
| |
| private final Bound upperBound; |
| |
| public static VersionRange from( VersionRange... ranges ) |
| { |
| if ( ranges == null ) |
| { |
| return from( Collections.<VersionRange>emptySet() ); |
| } |
| return from( Arrays.asList( ranges ) ); |
| } |
| |
| public static VersionRange from( Collection<? extends VersionRange> ranges ) |
| { |
| if ( ranges != null && ranges.size() == 1 ) |
| { |
| return ranges.iterator().next(); |
| } |
| return new UnionVersionRange( ranges ); |
| } |
| |
| private UnionVersionRange( Collection<? extends VersionRange> ranges ) |
| { |
| if ( ranges == null || ranges.isEmpty() ) |
| { |
| this.ranges = Collections.emptySet(); |
| lowerBound = upperBound = null; |
| } |
| else |
| { |
| this.ranges = new HashSet<VersionRange>( ranges ); |
| Bound lowerBound = null, upperBound = null; |
| for ( VersionRange range : this.ranges ) |
| { |
| Bound lb = range.getLowerBound(); |
| if ( lb == null ) |
| { |
| lowerBound = null; |
| break; |
| } |
| else if ( lowerBound == null ) |
| { |
| lowerBound = lb; |
| } |
| else |
| { |
| int c = lb.getVersion().compareTo( lowerBound.getVersion() ); |
| if ( c < 0 || ( c == 0 && !lowerBound.isInclusive() ) ) |
| { |
| lowerBound = lb; |
| } |
| } |
| } |
| for ( VersionRange range : this.ranges ) |
| { |
| Bound ub = range.getUpperBound(); |
| if ( ub == null ) |
| { |
| upperBound = null; |
| break; |
| } |
| else if ( upperBound == null ) |
| { |
| upperBound = ub; |
| } |
| else |
| { |
| int c = ub.getVersion().compareTo( upperBound.getVersion() ); |
| if ( c > 0 || ( c == 0 && !upperBound.isInclusive() ) ) |
| { |
| upperBound = ub; |
| } |
| } |
| } |
| this.lowerBound = lowerBound; |
| this.upperBound = upperBound; |
| } |
| } |
| |
| public boolean containsVersion( Version version ) |
| { |
| for ( VersionRange range : ranges ) |
| { |
| if ( range.containsVersion( version ) ) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public Bound getLowerBound() |
| { |
| return lowerBound; |
| } |
| |
| public Bound getUpperBound() |
| { |
| return upperBound; |
| } |
| |
| @Override |
| public boolean equals( Object obj ) |
| { |
| if ( obj == this ) |
| { |
| return true; |
| } |
| else if ( obj == null || !getClass().equals( obj.getClass() ) ) |
| { |
| return false; |
| } |
| |
| UnionVersionRange that = (UnionVersionRange) obj; |
| |
| return ranges.equals( that.ranges ); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| int hash = 97 * ranges.hashCode(); |
| return hash; |
| } |
| |
| @Override |
| public String toString() |
| { |
| StringBuilder buffer = new StringBuilder( 128 ); |
| for ( VersionRange range : ranges ) |
| { |
| if ( buffer.length() > 0 ) |
| { |
| buffer.append( ", " ); |
| } |
| buffer.append( range ); |
| } |
| return buffer.toString(); |
| } |
| |
| } |