public VersionRange restrict()

in maven-artifact/src/main/java/org/apache/maven/artifact/versioning/VersionRange.java [249:305]
42 lines of code
13 McCabe index (conditional complexity)

    public VersionRange restrict( VersionRange restriction )
    {
        List r1 = this.restrictions;
        List r2 = restriction.restrictions;
        List restrictions;
        if ( r1.isEmpty() || r2.isEmpty() )
        {
            restrictions = Collections.EMPTY_LIST;
        }
        else
        {
            restrictions = intersection( r1, r2 );
        }

        ArtifactVersion version = null;
        if ( restrictions.size() > 0 )
        {
            boolean found = false;
            for ( Iterator i = restrictions.iterator(); i.hasNext() && !found; )
            {
                Restriction r = (Restriction) i.next();

                if ( recommendedVersion != null && r.containsVersion( recommendedVersion ) )
                {
                    // if we find the original, use that
                    version = recommendedVersion;
                    found = true;
                }
                else if ( version == null && restriction.getRecommendedVersion() != null
                    && r.containsVersion( restriction.getRecommendedVersion() ) )
                {
                    // use this if we can, but prefer the original if possible
                    version = restriction.getRecommendedVersion();
                }
            }
        }
        // Either the original or the specified version ranges have no restructions
        else if ( recommendedVersion != null )
        {
            // Use the original recommended version since it exists
            version = recommendedVersion;
        }
        else if ( restriction.recommendedVersion != null )
        {
            // Use the recommended version from the specified VersionRange since there is no
            // original recommended version
            version = restriction.recommendedVersion;
        }
/* TODO: should throw this immediately, but need artifact
        else
        {
            throw new OverConstrainedVersionException( "Restricting incompatible version ranges" );
        }
*/

        return new VersionRange( version, restrictions );
    }