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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 org.eclipse.aether.version.InvalidVersionSpecificationException;
import org.eclipse.aether.version.Version;
import org.eclipse.aether.version.VersionRange;
/**
* A version range inspired by mathematical range syntax. For example, "[1.0,2.0)", "[1.0,)" or "[1.0]".
*/
final class GenericVersionRange
implements VersionRange
{
private final Bound lowerBound;
private final Bound upperBound;
/**
* Creates a version range from the specified range specification.
*
* @param range The range specification to parse, must not be {@code null}.
* @throws InvalidVersionSpecificationException If the range could not be parsed.
*/
GenericVersionRange( String range )
throws InvalidVersionSpecificationException
{
String process = range;
boolean lowerBoundInclusive, upperBoundInclusive;
Version lowerBound, upperBound;
if ( range.startsWith( "[" ) )
{
lowerBoundInclusive = true;
}
else if ( range.startsWith( "(" ) )
{
lowerBoundInclusive = false;
}
else
{
throw new InvalidVersionSpecificationException( range, "Invalid version range " + range
+ ", a range must start with either [ or (" );
}
if ( range.endsWith( "]" ) )
{
upperBoundInclusive = true;
}
else if ( range.endsWith( ")" ) )
{
upperBoundInclusive = false;
}
else
{
throw new InvalidVersionSpecificationException( range, "Invalid version range " + range
+ ", a range must end with either [ or (" );
}
process = process.substring( 1, process.length() - 1 );
int index = process.indexOf( "," );
if ( index < 0 )
{
if ( !lowerBoundInclusive || !upperBoundInclusive )
{
throw new InvalidVersionSpecificationException( range, "Invalid version range " + range
+ ", single version must be surrounded by []" );
}
String version = process.trim();
if ( version.endsWith( ".*" ) )
{
String prefix = version.substring( 0, version.length() - 1 );
lowerBound = parse( prefix + "min" );
upperBound = parse( prefix + "max" );
}
else
{
lowerBound = upperBound = parse( version );
}
}
else
{
String parsedLowerBound = process.substring( 0, index ).trim();
String parsedUpperBound = process.substring( index + 1 ).trim();
// more than two bounds, e.g. (1,2,3)
if ( parsedUpperBound.contains( "," ) )
{
throw new InvalidVersionSpecificationException( range, "Invalid version range " + range
+ ", bounds may not contain additional ','" );
}
lowerBound = parsedLowerBound.length() > 0 ? parse( parsedLowerBound ) : null;
upperBound = parsedUpperBound.length() > 0 ? parse( parsedUpperBound ) : null;
if ( upperBound != null && lowerBound != null )
{
if ( upperBound.compareTo( lowerBound ) < 0 )
{
throw new InvalidVersionSpecificationException( range, "Invalid version range " + range
+ ", lower bound must not be greater than upper bound" );
}
}
}
this.lowerBound = ( lowerBound != null ) ? new Bound( lowerBound, lowerBoundInclusive ) : null;
this.upperBound = ( upperBound != null ) ? new Bound( upperBound, upperBoundInclusive ) : null;
}
private Version parse( String version )
{
return new GenericVersion( version );
}
public Bound getLowerBound()
{
return lowerBound;
}
public Bound getUpperBound()
{
return upperBound;
}
public boolean containsVersion( Version version )
{
if ( lowerBound != null )
{
int comparison = lowerBound.getVersion().compareTo( version );
if ( comparison == 0 && !lowerBound.isInclusive() )
{
return false;
}
if ( comparison > 0 )
{
return false;
}
}
if ( upperBound != null )
{
int comparison = upperBound.getVersion().compareTo( version );
if ( comparison == 0 && !upperBound.isInclusive() )
{
return false;
}
if ( comparison < 0 )
{
return false;
}
}
return true;
}
@Override
public boolean equals( Object obj )
{
if ( obj == this )
{
return true;
}
else if ( obj == null || !getClass().equals( obj.getClass() ) )
{
return false;
}
GenericVersionRange that = (GenericVersionRange) obj;
return eq( upperBound, that.upperBound ) && eq( lowerBound, that.lowerBound );
}
private static boolean eq( T s1, T s2 )
{
return s1 != null ? s1.equals( s2 ) : s2 == null;
}
@Override
public int hashCode()
{
int hash = 17;
hash = hash * 31 + hash( upperBound );
hash = hash * 31 + hash( lowerBound );
return hash;
}
private static int hash( Object obj )
{
return obj != null ? obj.hashCode() : 0;
}
@Override
public String toString()
{
StringBuilder buffer = new StringBuilder( 64 );
if ( lowerBound != null )
{
buffer.append( lowerBound.isInclusive() ? '[' : '(' );
buffer.append( lowerBound.getVersion() );
}
else
{
buffer.append( '(' );
}
buffer.append( ',' );
if ( upperBound != null )
{
buffer.append( upperBound.getVersion() );
buffer.append( upperBound.isInclusive() ? ']' : ')' );
}
else
{
buffer.append( ')' );
}
return buffer.toString();
}
}